Lucent Technologies Modem Host Based Controller Modem AT User Manual

Data Addendum

June 15, 1998

Version 1.1

Host-Based Controller Modem AT Command Set

Contents

Page

Introduction

AT Command Summary ........................................2

AT Commands Reference .....................................6

Test and Debug AT Commands ..........................24

AT Commands Reference S-Registers ...............29

AT FAX Command Set (Class 1 FAX)..................36

AT FAX Commands Reference............................37

AT Voice Command Set.......................................42

AT Voice Commands Reference .........................43

AT COMMANDS: SPEAKERPHONE OPERATION.........45

AT COMMANDS: TELEPHONE ANSWERING DEVICE...45

AT VOICE COMMAND SET NOT DEFINED IN IS-101

This document specifies the Lucent Technologies

MTC AT Command Set for the host-based controller

modem products. Note that if a particular modem

board does not support a feature (such as voice),

then the corresponding commands are disabled for

that modem.

SPECIFICATIONS...................................................48

VOICE MODEM COMMAND EXAMPLES .....................49

AT DSVD Commands...........................................56

V.25ter AT Commands.........................................57

V.80 AT Commands .............................................59

AT Commands for Homologation Testing and

Debugging............................................................61

CONFIGURING FOR DIFFERENT COUNTRIES .............63

COUNTRY SPECIFIC HOMOLOGATION PARAMETERS .69

COUNTRY SPECIFIC S REGISTER DEFAULTS............84

CHANGING THE DTMF DIAL SPEED DEFAULT VALUE86

Data Addendum

June 15, 1998

Host-Based Controller Modem

AT Command Set

AT Command Summary (continued)

Table 2. AT Testing and Debugging Command Set Summary

Command Description

Command

Description

&&C

&&L

&&R

&&S

Write to/read from host interface

%T94

%T124

%T125

#UD

Test external DSP RAM

Return to on-chip DSP RAM

Load K56flex image to external DSP RAM

Unimodem diagnostics

Line-to-line loopback

Write to/read from DSP RAM location

Speaker codec loopback

Table 3. The S-Register Summary

Description

Automatic answer ring number

Ring counter

AT escape character

Command line termination character

Response formatting character

Command line editing character

Wait before dialing

Connection completion time-out

Comma dial modifier time

Automatic disconnect delay

DTMF dialing speed

S10

S11

S12

S14

S21

S22

S24

S28

S30

S32

S33

S35

S36

S37

S38

S42*

S43*

S48

S89

S90

S91

S108

Escape guard time

General bit-mapped options status

V.24 bit-mapped options status

Results bit-mapped options status

Timer to control sleep mode

V.34 modulation enable/disable

Inactivity timer

112

Synthetic ring volume

Synthetic ring frequency

Data calling tone

Negotiation fallback

Dial line rate

Enable/disable K56flex settings

Auto rate

Auto mode

LAPM error control and feature negotiation

Timer to control sleep mode

Local phone status

Line transmit level

Network codec type

* S-registers 42, and 43 are for test and debugging purposes only.

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AT Command Set

1998

Data Addendum

June 15,

AT Command Summary (continued)

Table 4. The Result Code Summary

Result Code

Numeric

Description

Command executed

CONNECT

RING

Modem connected to line

A ring signal has been detected

NO CARRIER

Modem lost carrier signal, or does not detect carrier signal, or does

not detect answer tone

ERROR

Invalid command

CONNECT 1200 EC*

NO DIALTONE

Connection at 1200 bit/s

No dial tone detected

Busy signal detected

BUSY

NO ANSWER

Remote end never answered

Connection at 2400 bit/s

Connection at 4800 bit/s

Connection at 9600 bit/s

CONNECT 2400 EC*

CONNECT 4800 EC*

CONNECT 9600 EC*

CONNECT 14400 EC*

CONNECT 19200 EC*

CONNECT 7200 EC*

CONNECT 12000 EC*

CONNECT 16800 EC*

CONNECT 300 EC*

CONNECT 21600 EC*

CONNECT 24000 EC*

CONNECT 26400 EC*

CONNECT 28800 EC*

CONNECT 31200 EC*

CONNECT 33600 EC*

CONNECT 38400 EC*

CONNECT 57600 EC*

CONNECT 115200 EC*

DELAYED

100

Connection at 14400 bit/s

Connection at 19200 bit/s

Connection at 7200 bit/s

Connection at 12000 bit/s

Connection at 16800 bit/s

Connection at 300 bit/s

Connection at 21600 bit/s

Connection at 24000 bit/s

Connection at 26400 bit/s

Connection at 28800 bit/s

Connection at 31200 bit/s

Connection at 33600 bit/s

Connection at 38400 bit/s (DTE rate)

Connection at 57600 bit/s (DTE rate)

Connection at 115200 bit/s (DTE rate)

Delay is in effect for the dialed number

Dialed number is blacklisted

BLACKLISTED

BLACKLIST FULL

Blacklist is full

CONNECT 32000 EC*

CONNECT 34000 EC*

CONNECT 36000 EC*

CONNECT 38000 EC*

CONNECT 40000 EC*

CONNECT 42000 EC*

CONNECT 44000 EC*

CONNECT 46000 EC*

CONNECT 48000 EC*

CONNECT 50000 EC*

CONNECT 52000 EC*

CONNECT 54000 EC*

CONNECT 56000 EC*

CONNECT 28000 EC*

Connection at 32000 bit/s (K56flex mode) or V.90

Connection at 34000 bit/s (K56flex mode)

Connection at 36000 bit/s (K56flex mode) or V.90

Connection at 38000 bit/s (K56flex mode)

Connection at 40000 bit/s (K56flex mode) or V.90

Connection at 42000 bit/s (K56flex mode)

Connection at 44000 bit/s (K56flex mode) or V.90

Connection at 46000 bit/s (K56flex mode)

Connection at 48000 bit/s (K56flex mode) or V.90

Connection at 50000 bit/s (K56flex mode)

Connection at 52000 bit/s (K56flex mode) or V.90

Connection at 54000 bit/s (K56flex mode)

Connection at 56000 bit/s (K56flex mode)

Connection at 28000 bit/s (V.90 mode)

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Host-Based Controller Modem

AT Command Set

AT Command Summary (continued)

Result Code

Numeric

101

102

103

104

105

106

107

108

109

110

111

112

113

114

Description

CONNECT 29333 EC*

CONNECT 30666 EC*

CONNECT 33333 EC*

CONNECT 34666 EC*

CONNECT 37333 EC*

CONNECT 38666 EC*

CONNECT 41333 EC*

CONNECT 42666 EC*

CONNECT 45333 EC*

CONNECT 46666 EC*

CONNECT 49333 EC*

CONNECT 50666 EC*

CONNECT 53333 EC*

CONNECT 54666 EC*

Connection at 29333 bit/s (V.90 mode)

Connection at 30666 bit/s (V.90 mode)

Connection at 33333 bit/s (V.90 mode)

Connection at 34666 bit/s (V.90 mode)

Connection at 37333 bit/s (V.90 mode)

Connection at 38666 bit/s (V.90 mode)

Connection at 41333 bit/s (V.90 mode)

Connection at 42666 bit/s (V.90 mode)

Connection at 45333 bit/s (V.90 mode)

Connection at 46666 bit/s (V.90 mode)

Connection at 49333 bit/s (V.90 mode)

Connection at 50666 bit/s (V.90 mode)

Connection at 53333 bit/s (V.90 mode)

Connection at 54666 bits/s (V.90 mode)

* EC only appears when the extended result codes configuration option is enabled. EC is replaced by one of the following symbols,

depending upon the error control method used:

V42bis—V.42 error control and V.42bis data compression.

V42—V.42 error control only.

MNP 5—MNP class 4 error control and MNP class 5 data compression.

MNP 4—MNP class 4 error control only.

NoEC—No error control protocol.

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AT Command Set

1998

Data Addendum

June 15,

AT Commands Reference

AT commands are issued to the modem to control the modem's operation and software configuration. AT

commands can only be entered while the modem is in command mode. The format for entering AT commands is:

TYPE:

command.

ATXn

where X is the AT command and n is the specific value for that

PRESS:

Enter

If n is omitted from a command that takes a parameter valu, the

value 0 I(zero)

is assumed.

Any command issued is acknowledged with a response in either text or numeric values known as result codes.

Table 2 lists all the valid result codes.

In the following listing, all commands and command-values accepted by the modem are shown; any entries other

than those shown cause the ERROR result code.

+++ Escape sequence

The escape sequence allows the modem to exit data mode and enter on-line command mode. While in on-line

command mode, you may communicate directly to your modem using AT commands. Once you are finished, you

may return to data mode using the ATO command.

A pause, the length which is set by the Escape Guard Time (S12), must be used before and after an escape

sequence is issued. This pause prevents the modem from interpreting the escape sequence as data.

The value of the escape sequence character may be changed using Register S2.

Repeat Last Command

This command repeats the last command string entered. Do not precede this command with an AT prefix or

conclude it by pressing Enter.

Answer Command

This command instructs the modem to go off-hook and answer an incoming call.

Bn Communication Standard Setting

This command determines CCITT vs. Bell standard.

B0:

B1:

B2:

Selects CCITT V.22 mode when the modem is at 1200 bits/s.

Selects Bell 212A when the modem is at 1200 bits/s (default).

Unselects V23 reverse channel (same as B3 ).

B3:

Unselects V23 reverse channel (same as B2 ).

B15:

Selects V.21 when the modem is at 300 bits/s.

B16:

Selects Bell 103J when the modem is at 300 bits/s (default).

Result Codes:

n = 0, 1, 2, 3, 15, 16

Otherwise

ERROR

Carrier Control

The modem will accept the C1 command without error in order to assure backward compatibility with

communications software that issues the C1 command. However, this modem does not support the C0

command. The C0 command may instruct some other modems not to send carrier (i.e., it puts them in a receive-

only mode).

C0:

C1:

Transmit carrier always off.

Normal transmit carrier switching.

Result Codes:

n = 1

ERROR

Otherwise

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Host-Based Controller Modem

AT Command Set

AT Command Reference (continued)

Dial

This command instructs the modem to begin the dialing sequence. The dial string (n, including modifiers and the

telephone number) is entered after the ATD command.

A dial string can be up to 60 characters long. Any digit or symbol (0 9, *, #, A, B, C, D) may be dialed as touch-

tone digits. Characters such as spaces, hyphens, and parentheses do not count they are ignored by the

modem and may be included in the dial string to enhance readability.

The following may be used as dial string modifiers:

Redials last number. Should be the first character following ATD, ignored otherwise.

Pulse dialing.

Touch-tone dialing (default).

Pause during dialing. Pause for time specified in Register S8 before processing the next

character

in the dial string.

Wait for dial tone. Modem waits for a second dial tone before processing the dial string.

The modem switches to speakerphone mode and dials the number. An ATH command may be

used to

disconnect the voice call.

Wait for quiet answer. Wait for five seconds of silence after dialing the number. If silence is not

detected, the modem sends a NO ANSWER result code back to the user.

Hook flash. Causes the modem to go on-hook for 0.5 seconds and then return to off-hook.

Return to command mode. Causes the modem to return to command mode after dialing the

;

number,

without disconnecting the call.

Disable data calling tone transmission.

S=n Dial a telephone number previously stored using the &Zn=x command (see the &Zn=x command for

further information). The range of n is 0—3.

Bong tone detection

Echo Command

This command controls whether or not the characters entered from your computer keyboard are echoed back to

your monitor while the modem is in command mode.

E0:

E1:

Disables echo to the computer.

Enables echo to the computer (default).

Result Codes:

n = 0, 1

ERROR

Otherwise

Online Data Character Echo Command

This command determines if the modem will echo data from the DTE. This modem does not support the F0

version of the command. However, the modem will accept F1, which may be issued by older communication

software, to assure backward compatibility.

F0:

F1:

Online data character echo enabled (NOT SUPPORTED).

Online character echo disabled.

Result Codes:

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AT Command Set

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AT Command Reference (continued)

n = 1

ERROR

Otherwise

Hook Control

This command instructs the modem to go on-hook to disconnect a call, or off-hook to make the phone line busy.

H0:

H1:

Modem goes on-hook (default).

Modem goes off-hook.

Result Codes:

n = 0, 1

ERROR

Otherwise

Request ID Information

This command displays specific product information about the modem.

I0:

I1:

I2:

Returns modem identity string and driver version number, same as I3.

Calculates ROM checksum and displays it on the DTE.

Performs a ROM check and calculates and verifies the checksum displaying OK or

ERROR.

I3:

I4:

I5:

Returns modem identity string and driver version number, same as I0.

Returns firmware version for data pump.

Returns the board/firmware ID and country ID in hexadecimal (for Apollo).

Returns the code ver, board ID, country ID and subsystem vendor ID in hexadecimal (for

MARS).

I6-8:

I9:

Returns OK for compatibility.

Returns country ID in English.

I11:

Displays connection information as described in the following example.

Result Codes:

ERROR

As described n = 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11

Otherwise

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Host-Based Controller Modem

AT Command Set

AT Command Reference (continued)

The ATI11 result has two pages; the user must hit a key to get the second page. See the following example:

ati11

Description

---------------

Last Connection

K56flex connection

------------------

56K

V.90 Connection

---------------

V.90

Initial Transmit Carrier Rate

Initial Receive Carrier Rate

Final Transmit Carrier Rate

Final Receive Carrier Rate

Protocol Negotiation Result

Data Compression Result

Estimated Noise Level

28800

50000

28800

50000

LAPM

V42bis

152

28800

49333

28800

49333

LAPM

V42bis

152

Receive Signal Power Level (-dBm) 25

10 Transmit Signal Power Level (-dBm) 16

11 Round Trip Delay (msec) 4

Press any key to continue; ESC to quit.

12 Near Echo Level

13 Far Echo Level

14 Transmit Frame Count

(-dBm) NA

15 Transmit Frame Error Count

16 Receive Frame Count

17 Receive Frame Error Count

18 Retrain by Local Modem

19 Retrain by Remote Modem

20 Call Termination Cause

21 Robbed-Bit Signaling

22 Digital Loss

(dB) 6

4342C3

23 Remote Server ID

The ATI11 command may be issued from on-line command mode or after the end of a call. After a call, some of

the values are no longer valid; it's useful to know which ones.

Each of the line items in the ATI11 result is explained next:

1. V.90, 56K, V.34, or V.32 depending on the type of connection negotiated.

2. Initial upstream rate

3. Initial downstream rate

4. Current or final upstream rate

5. Current or final downstream rate

6. LAPM or MNP or None, depending on V.42 negotiation

7. V42bis or MNP or None, depending on V.42 negotiation

8. Mean-square error of received downstream signal. Difference between received constellation point and

reference decision point. This is a dimensionless decimal number, only valid during a call. Higher numbers

are worse. There's no absolute threshold of goodness; it depends on the downstream data rate. The number

varies during a call, so it can be useful to sample it a few times.

9. The received signal power, although labeled -dBm, is only a relative measure for comparing calls to/from

different locations. Only valid during a call.

10. Upstream transmit signal power.

11. Round-trip delay in milliseconds.

12. Echo levels are valid for V.34 only.

13. Echo levels are valid for V.34 only.

14. Number of LAPM frames sent upstream during this call. Count wraps around at 65535.

15. Number of REJ frames received at the analog client modem.

16. Number of LAPM frames received by client during this call. Count wraps around at 65535.

17. Number of frames received in error by the client.

18. Number of retrains or rate renegotiations requested by this modem.

19. Number of retrains or rate renegotiations requested by remote modem.

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AT Command Set

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AT Command Reference (continued)

20. Reason for call ending, only valid after call ends:

0 = Local modem command: ATH, DTR drop

1 = Remote modem: cleardown, loss of signal

2 = No answer, busy, etc.

3 = Training failure V.90, K56flex or V.34.

4 = Protocol failure if required by \N4, for example.

21. For PCM connection only, a hexadecimal 6-bit pattern of T1 frames with robbed-bit signaling.

22. For PCM connection only, the downstream digital loss.

23. For K56flex connection only, the V.8bis info sent by the server. Meaning is defined at the server and by

convention. Example above is from a recent Ascend MAX in µ-Law.

Monitor Speaker Volume

This command sets speaker volume to low, medium, or high.

L0:

Selects low volume.

L1:

Selects low volume.

L2:

L3:

Selects medium volume (default).

Selects high volume.

Result Codes:

n = 0, 1, 2, 3

Otherwise

ERROR

Monitor Speaker Mode

This command turns the speaker on or off.

M0:

M1:

M2:

M3:

The speaker is off.

The speaker is on until the modem detects the carrier signal (default).

The speaker is always on when modem is off-hook.

The speaker is on until the carrier is detected, except while dialing.

Result Codes:

n = 0, 1, 2, 3

Otherwise

ERROR

Modulation Handshake

This command controls whether or not the local modem performs a negotiated handshake at connection time with

the remote modem when the communication speed of the two modems is different.

N0:

When originating or answering, this is for handshake only at the communication standard specified by

S37 and the ATB command.

N1:

When originating or answering, begin the handshake only at the communication standard specified by

S37 and the ATB command. During handshake, fallback to a lower speed may occur (default).

Result Codes:

n = 0, 1

Otherwise

ERROR

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Host-Based Controller Modem

AT Command Set

AT Command Reference (continued)

Return On-line to Data Mode

O0:

Instructs the modem to exit on-line command mode and return to data mode

(see AT Escape Sequence, +++).

O1:

O3:

This command issues a retrain before returning to on-line data mode.

This command issues a rate renegotiation before returning to on-line data mode.

Result Codes:

n = 0, 1, 3

Otherwise

ERROR

Select Pulse Dialing

This command configures the modem for pulse (non touch-tone) dialing. Dialed digits are pulsed until a T

command or dial modifier is received. Tone dial is the default setting.

Result Code Control

Result codes are informational messages sent from the modem and displayed on your monitor. Basic result

codes are OK, CONNECT, RING, NO CARRIER, and ERROR. The ATQ command allows the user to turn result

codes on or off.

Q0:

Q1:

Enables modem to send result codes to the computer (default).

Disables modem from sending result codes to the computer.

Result Codes:

n = 0, 1

ERROR

Otherwise

Select Tone Dialing

This command instructs the modem to send DTMF tones while dialing. Dialed digits are tone dialed until a P

command or dial modifier is received. This is the default setting.

DCE Response Format

This command controls whether result codes (including call progress and negotiation progress messages) are

displayed as words or their numeric equivalents. For the result code, see table 4.

V0:

V1:

Displays result codes as digits.

Displays result codes as text (default).

Result Codes:

n = 0, 1

ERROR

Otherwise

ATV0

Result Code Format <numeric code> <CR>

ATV1

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AT Command Set

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AT Command Reference (continued)

Result Code Option

W0:

W1:

W2:

CONNECT result code reports DTE receive speed. Disable protocol result codes.

CONNECT result code reports DTE receive speed. Enable protocol result codes.

CONNECT result code reports DCE receive speed. Enable protocol result codes (default).

Result Codes:

n = 0, 1, 2

Otherwise

ERROR

Result Code Selection and Call Progress Monitoring

This command enables tone detection options used in the dialing process. As these functions are chosen, the

modem chip set’s result codes are also affected. Therefore, this command is frequently used to control the

modem chip set’s responses. The primary function of this control is to control the modem chip set’s call response

capabilities.

Ext. Result Code Dial Tone Detect Busy Tone Detect

Disable

Enable

Disable

Enable

Disable

Enable

Disable

Enable

Enable (default)

Enable

Extended Result Codes

Disabled:

Enabled:

Displays only the basic result codes OK, CONNECT, RING, NO CARRIER, and ERROR.

Displays basic result codes, along with the connect message and the modem's date rate,

and an indication of the modem's error correction and data compression operation.

Dial Tone Detect

Disabled:

The modem dials a call regardless of whether it detects a dial tone. The period of time

the modem waits before dialing is specified in register S6.

Enabled:

The modem dials only upon detection of a dial tone, and disconnects the call if the dial

tone is not detected within 10 seconds.

Busy Tone Detect

Disabled:

Enabled:

The modem ignores any busy tones it receives.

The modem monitors for busy tones.

Result Codes:

ERROR

n = 0, 1, 2, 3, 4, 5, 6, 7

Otherwise

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Host-Based Controller Modem

AT Command Set

AT Command Reference (continued)

Long Space Disconnect

Long space disconnect is always disabled.

Y0:

Y1:

Disable long space disconnect (default).

Enable long space disconnect (NOT SUPPORTED).

Result Codes:

n = 0

Otherwise

ERROR

Recall Stored Profile

This command instructs the modem chip set to go on-hook and restore the profile saved by the last &W

command. Either Z0 or Z1 restores the same single profile.

Result Codes:

ERROR

n = 0, 1

Otherwise

&Bn

V.32 Auto Retrain

This modem always auto retrains.

&B0: Disable V.32 auto retrain (NOT SUPPORTED).

&B1: Enable V.32 auto retrain (default).

Result Codes:

ERROR

n = 1

Otherwise

&Cn

Data Carrier Detect (DCD) Control

Data Carrier Detect is a signal from the modem to your computer indicating that the carrier signal is being

received from a remote modem. DCD normally turns off when the modem no longer detects the carrier signal.

&C0: The state of the carrier from the remote modem is ignored. DCD circuit is always on.

&C1: DCD turns on when the remote modem's carrier signal is detected, and off when the carrier signal

is not detected (default).

Result Codes:

ERROR

n = 0, 1

Otherwise

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AT Command Set

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AT Command Reference (continued)

&Dn

DTR Control

This command interprets how the modem responds to the state of the DTR signal and changes to the DTR signal.

&D0: Ignore. The modem ignores the true status of DTR and treats it as always on. This should only

used if your computer does not provide DTR to the modem.

&D1: If the DTR signal is not detected while in on-line data mode, the modem enters command mode,

issues OK result code, and remains connected.

&D2: If the DTR signal is not detected while in on-line data mode, the modem disconnects (default).

&D3: Reset modem on the on-to-off DTR transition.

Result Codes:

ERROR

n = 0, 1, 2, 3

Otherwise

&Fn

Load Factory Settings

This command loads the configuration stored and programmed at the factory. This operation replaces all of the

command options and the S-register settings in the active configuration with factory default values.

Note: In voice mode (AT+FCLASS=8), if the AT&F command is placed on the same line as other commands, the

command line is ignored. To load factory settings in voice mode, issue AT&F by itself.

Result Codes:

n = 0

ERROR

Otherwise

&Gn V.22bis Guard Tone Control

This command determines which guard tone, if any, to transmit while transmitting in the high band (answer

mode). This command is only used in V.22 and V.22bis mode. This option is not used in North America and is for

international use only.

&G0: Guard tone disabled (default).

&G1: Sets guard tone to 550 Hz.

&G2: Sets guard tone to 1800 Hz.

Result Codes:

ERROR

n = 0, 1, 2

Otherwise

&Jn

Auxiliary Relay option

&J0:

&J1:

The auxiliary relay is never closed. (Default)

NOT SUPPORTED

Result Codes:

n = 0

ERROR

Otherwise

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Host-Based Controller Modem

AT Command Set

AT Command Reference (continued)

&Kn

Local Flow Control Selection

&K0: Disable flow control

&K1: Reserved

&K2: Reserved

&K3: Enable RTS/CTS (hardware) flow control (default)

&K4: Enable XON/XOFF flow control

Result Codes:

n = 0, 3, 4

Otherwise

ERROR

&Mn

&M0:

Asynchronous Communications Mode

Asynchronous mode (default).

Reserved

&M1:

&M2:

&M3:

&M4:

Result Codes:

n = 0

ERROR

Otherwise

&Pn

Pulse Dial Make-to-Break Ratio Selection

This Command is effective only for Japan.

&P0

&P1

&P2

39/61 make/break ratio, 10PPS

33/67 make/break ratio, 10PPS (default)

33/67 make/break ratio, 20PPS

Result Codes:

n = 0, 1, 2

Otherwise

ERROR

&Qn Asynchronous Communications Mode

&Q0:

&Q5:

&Q6:

&Q8:

Asynchronous Mode, buffered. Same as \N0.

Error Control Mode, buffered (default). Same as \N3.

Asynchronous Mode, buffered. Same as \N0.

MNP error control mode. If an MNP error control protocol is not established, the modem will

fallback according to the current user setting in S36.

&Q9:

V.42 or MNP error control mode. If neither error control protocol is established, the modem will

fallback according to the current user setting in S36.

Result Codes:

n = 0, 5, 6, 8, 9

Otherwise

ERROR

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AT Command Set

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AT Command Reference (continued)

&Sn

Data Set Ready (DSR) Option

This command selects DSR action.

&S0:

&S1:

DSR always ON (default).

DSR comes on when establishing a connection and goes off when the connection ends.

Result Codes:

n = 0, 1

ERROR

Otherwise

&Tn

Self-Test Commands

This command allows the user to perform diagnostic tests on the modem. These tests can help to isolate

problems when experiencing periodic data loss or random errors.

&T0

&T1

Abort. Stops any test in progress.

Local analog loop. This test verifies modem operation, as well as the connection

between the modem and computer. Any data entered at the local DTE is modulated, then

demodulated, and returned to the local DTE. To work properly, the modem must be off-line.

&T3 Local digital loopback test.

&T6 Remote digital loopback test. This test can verify the integrity of the local modem, the communications

link, and the remote modem. Any data entered at the local DTE is sent to, and returned from, the

remote modem. To work properly, the modems must be on-line with error control disabled.

Result Codes:

n = 0

CONNECT

ERROR

n = 1, 3, 6

Otherwise

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Host-Based Controller Modem

AT Command Set

AT Command Reference (continued)

View Active Configuration and Stored Profile

This command is used to display the active profiles.

For example:

Option

Selection

AT Cmd

Comm Standard

CommandCharEcho

Speaker Volume

Speaker Control

Bell

Enabled

Medium

OnUntilCarrier

Enabled

Result Codes

Dialer Type

Tone

Text

Enabled

Standard RS232

T/P

ResultCode Form

ExtendResultCode

Dial Tone Detect

Busy Tone Detect

LSD Action

DTR Action

Press any key to continue; ESC to quit.

Option

Selection

AT Cmd

V22b Guard Tone

Flow Control

Disabled

Hardware

V42, MNP, Buffer

Enabled

Error Control Mode

Data Compression

AutoAnswerRing#

AT Escape Char

CarriageReturnChar

Linefeed Char

Backspace Char

Blind Dial Pause

NoAnswer Timeout

“ , “ Pause Time

2 sec

50 sec

2 sec

Press any key to continue; ESC to quit.

Option

Selection

AT Cmd

No Carrier Disc

DTMF Dial Speed

Escape GuardTime

Data Calling Tone

Line Rate

2000 msec

95 msec

1000 msec

Disabled

33600

S10

S11

S12

S35

S37

-SSE

DSVD mode

Disabled

Stored Phone Numbers

&Z0=

&Z1=

&Z2=

&Z3=

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AT Command Reference (continued)

&Wn

Store Current Configuration

This command stores certain command options and S-register values except S3, S4, and S5. The ATZ command

or a power-up reset of the modem restores this profile.

Result Codes:

n = 0

ERROR

Otherwise

&Yn

Select Stored Profile for Hard Reset

This command does not change the behavior of the modem but is included for compatibility with applications that

issue the &Y0 command

&Y0:

&Y1:

Select stored profile 0 on power-up

ERROR

Result Codes:

n = 0

ERROR

Otherwise

&Zn=x

Store Telephone Number

This command is used to store up to four dialing strings for later dialing. The format for the command is &Zn =

”stored number” where n is the location 0—3 to which the number should be written. The dial string may contain

up to 40 characters. The ATDS = n command dials using the string stored in location n.

Result Codes:

ERROR

n = 0, 1, 2, 3

Otherwise

\An

Select Maximum MNP Block Size

The modem will operate an MNP error corrected link using a maximum block size controlled by the parameter

supplied.

\A0:

\A1:

\A2:

\A3:

64 characters.

128 characters.

192 characters.

256 characters (default).

Result Codes:

n = 0, 1, 2, 3

Otherwise

ERROR

\Bn

Transmit Break to Remote

In non-error-control mode, the modem will transmit a break signal to the remote modem with a length in multiples

of 100ms according to parameter specified. The command works in conjunction with the \K command.

\B1 - \B9:

Result Codes:

Break length in 100ms units. (Default = 3.) (Non-error-control mode only.)

If connected in data modem mode.

NO CARRIER

If not connected or connected in fax modem mode.

Modem Port Flow Control

\G0:

\G1:

Modem process XON/XOFF flow control characters locally (default).

Modem passes XON/XOFF flow control characters.

Result Codes:

n = 0, 1

ERROR

Otherwise

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AT Command Set

AT Command Reference (continued)

Bits/s Rate Adjusted

This command determines whether or not the negotiated connect speed of the modem forces the adjustment of

the speed of the DTE to the modem’s speed.

\J0:

\J1:

Buffer mode. Error control selected (or not) by \Nn command (default).

Force the max DCE rate to the DTE rate.

Result Codes:

n = 0 or 1

Otherwise

ERROR

\Kn

Break Control

Controls the response of the modem to a break received from the DTE or the remote modem or the \B command.

The response is different in three separate cases.

The first case is where the modem receives a break from the DTE when the modem is operating in data transfer

mode:

\K0:

\K1:

\K2:

\K3:

\K4:

\K5:

Enter on-line command mode, no break sent to the remote modem.

Clear data buffers and send break to remote modem.

Same as 0.

Send break to remote modem immediately.

Same as 0.

Send break to remote modem in sequence with transmitted data. (Default.)

The second case is where the modem is in the on-line command state (waiting for AT commands) during a data

connection, and the \B is received in order to send a break to the remote modem:

\K0:

\K1:

\K2:

\K3:

\K4:

\K5:

Clear data buffers and send break to remote modem.

Clear data buffers and send break to remote modem. (Same as 0.)

Send break to remote modem immediately.

Send break to remote modem immediately. (Same as 2.)

Send break to remote modem in sequence with data.

Send break to remote modem in sequence with data. (Same as 4.) (Default.)

The third case is where there a break is received from a remote modem during a connection:

\K0:

\K1:

\K2:

\K3:

\K4:

\K5:

Clear data buffers and send break to the DTE.

Clear data buffers and send break to the DTE. (Same as 0.)

Send a break immediately to DTE.

Send a break immediately to DTE. (Same as 2.)

Send a break in sequence with received data to DTE.

Send a break in sequence with received data to DTE. (Same as 4.) (Default.)

Result Codes:

ERROR

n = 0,1, 2, 3, 4, 5

Otherwise

\Nn

Error Control Mode Selection

This command determines the type of error control used by the modem when sending or receiving data.

\N0:

\N1:

\N2:

Buffer mode. No error control (same as &Q6).

Direct mode.

MNP* or disconnect mode. The modem attempts to connect using MNP 2 4 error control

procedures. If this fails, the modem disconnects. This is also known as MNP reliable

mode.

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AT Command Reference (continued)

\N3:

V.42, MNP, or buffer (default).

The modem attempts to connect in V.42 error control mode. If this fails, the modem attempts to

connect in MNP mode. If this fails, the modem connects in buffer mode and continues

operation. This

is also known as V.42/MNP auto reliable mode (same as &Q5).

\N4:

V.42 or disconnect. The modem attempts to connect in V.42 error control mode. If this fails, the

call

will be disconnected.

\N5:

\N7:

V.42. MNP or buffer (same as \N3).

Result Codes:

n = 0, 1, 2, 3, 4,5,7

Otherwise

ERROR

Local Flow Control Selection

\Q0:

\Q1:

\Q2:

\Q3:

Disable flow control. Same as &K0.

XON/XOFF software flow control. Same as &K4.

CTS-only flow control. This is not supported and the response is ERROR.

RTS/CTS to DTE (default). Same as &K3.

Result Codes:

n = 0, 1, 3

Otherwise

ERROR

\Rn

Ring indicator signal off after the telephone call is answered (Compatibility command)

\R0:

ring indicator signal is off after the telephone call is answered

Result Codes:

n = 0

ERROR

Otherwise

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AT Command Set

AT Command Reference (continued)

\Tn

Inactivity Timer

This command specifies the length of time (in minutes) that the modem will wait before disconnecting when no

data is sent or received. A setting of zero disables the timer. Alternatively, this timer may be specified in register

S30. This function is only applicable to buffer mode.

\T0:

Inactivity timer disabled (default).

Result Codes:

n = 0 - 255

Otherwise

ERROR

\Vn

Protocol Result Code

\V0:

\V1:

\V2:

Disable protocol result code appended to DCE speed.

Enable protocol result code appended to DCE speed (default).

Same as \V1.

Result Codes:

n = 0, 1

ERROR

Otherwise

\Xn

XON/XOFF Pass Through

\X0:

\X1

Modem process XON/XOFF flow control characters locally (default).

Modem passes XON/XOFF flow control characters.

Result Codes:

n = 0, 1

ERROR

Otherwise

-Cn

Data Calling Tone

Data Calling Tone is a tone of certain frequency and cadence as specified in V.25 which allows remote

Data/FAX/Voice discrimination. The frequency is 1300 Hz with a cadence of .5 s on and 2 s off.

-C0:

-C1:

Disabled (default).

Enabled.

Result Codes:

n = 0, 1

ERROR

Otherwise

-V90 = <n>

command to enable/disable V.90 and change downstream rate

-V90=0 will disable V.90

-V90=1 will enable V.90 Auto Rate (default value)

-V90=X - controls the downstream rate

-V90? - Shows the current value

-V90=? - Shows the range [0-21]

See next page for the values of n.

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Data Addendum

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AT Command Reference (continued)

The table below shows the possible values:

“AT-V90=X”

Downstream Rate

V.90 disabled

Auto Rate (default)

28000 kbit/s

29333 kbit/s

30666 kbit/s

32000 kbit/s

33333 kbit/s

34666 kbit/s

36000 kbit/s

37333 kbit/s

38666 kbit/s

40000 kbit/s

41333 kbit/s

42666 kbit/s

44000 kbit/s

45333 kbit/s

46666 kbit/s

48000 kbit/s

49333 kbit/s

50666 kbit/s

52000 kbit/s

53333 kbit/s

View Numbers in Blacklist

If blacklisting is in effect, this command displays the numbers for which the last call attempted in the past two

hours failed. The ERROR result code appears in countries that do not require blacklisting.

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AT Command Set

AT Command Reference (continued)

%Cn Data Compression Control

This command determines the operation of V.42bis and MNP class 5 data compression. Online changes do not

take effect until a disconnect occurs first.

%C0: V.42bis/MNP 5 disabled. No data compression.

%C1: V.42bis/MNP 5 enabled. Data compression enabled (default).

Result Codes:

n = 0, 1

ERROR

Otherwise

%En Enable/Disable Auto-Retrain and Fallback/Fall Forward

Provides option for the modem to automatically monitor line quality to fall back when line quality is insufficient and

to fall forward when line quality is sufficient.

%E0:

%E1:

%E2:

Disable fallback/fall forward

Enable fallback, Disable fall forward

Enable fallback/fall forward (Default)

Result Codes:

n = 0,1, 2

ERROR

Otherwise

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AT Command Set

1998

Data Addendum

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Test and Debug AT Commands

The following commands are to be used for testing and debugging only and are not meant for general use.

&&C

Write to / Read from DSP Register

AT&&C<loc>,<val> writes the value <val> to DSP register at location <loc>.

AT&&C<loc> reads from location <loc>.

&&L

&&R

Line-to-Line Loopback

This command provides a loopback for line-to-line.

Write to/Read from DSP RAM Location

AT&&R<loc>,<val> writes the value <val> to DSP RAM location <loc>.

AT&&R<loc> reads from location <loc>.

&&S

Speaker Codec Loopback

This command provides a loopback from the microphone to the speaker.

%T94 Test External RAM

This command “AT%T94” is used for testing the external RAM. If the external RAM is good, this command returns

“PASS”. If the external ram is not good, this command returns “FAIL”.

Example :

AT%T94

PASS

- external ram is good

%T125, %T124

Test DSP 56K Version in External Ram

The command “AT%T125” is used for testing the DSP 56K code version and checksum running in external ram.

After issuing “AT%T125” the user may then issue “ATI4” to get DSP Version or “ATI1” to get the DSP checksum.

(The command “AT%T125” is not valid for ramless version of the DSP 56K code.)

The command “AT%124” is for internal ram version.

#UD

Unimodem Diagnostics

The reference for the #UD command is Microsoft’s Draft Reference Specification rev.0.85. The Lucent

Technologies modem implements a subset of the parameters in that document.

#UD is an action command. It does not take parameters. It shall be the last command in the command line.

The modem logs aspects of its operation for each call, and saves these results (in volatile memory) until cleared

by one of the following events:

1. Power off (or D1 or D3 state entered)

2. Hard reset (e.g. negate DTR with &D3 set, reset button)

3. Soft reset = ATZ or AT&F

4. ATD command issued

5. ATA command issued

6. Automatic answer (e.g. set register S0>0 and ring detected)

These results are NOT cleared by changing DTR, V.24 circuit 108.2, if &D0, &D1 or &D2.

In response to this command, the modem reports one or more lines of information text as defined below.

Information text format is defined in ITU V.25ter: each line is preceded by a <CR><LF> pair, and terminated by

<CR><LF>. (Note: as per V.25ter, CR and LF characters may be changed by writing new values to the contents

of registers S2 and S3 respectively.)

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AT Command Set

Test and Debug AT Commands (continued)

The modem may generate a single line or multiple lines, based on modem capabilities and call results, followed

by a standard OK final result code. For example, if call setup failed, only that result is useful. Each information

text line shall be formatted as follows, including one or more key=value pairs:

DIAG <token key=value [[key=value] [key=value]] …>

DIAG 5 characters, hex: 44, 49, 41, 47, 20

left angle bracket (less than sign), hex: 3C

token unique 32-bit hexadecimal string 2A4D3263, hex: 32, 41, 34, 44, 33, 32, 36, 33

space space character, hex 20

key

single hexadecimal numeric digit, see Table 1

equal sign, hex: 3D

value any string as defined below (Tables 1-3, etc.)

right angle bracket (greater than sign), hex: 3E

Unless otherwise noted, all values are hexadecimal numbers. Any numeric values from tables in ITU V.58 are

converted to hexadecimal. Multi-digit values are reported MSD first. Leading 0’s may be deleted.

The following table includes all the items listed in Microsoft’s specification for the AT#UD command. Within these

items, the one that has a check mark in the “Implemented” column is implemented in this release of the modem

product. For an item that has an extra option table, please check the corresponding option table to see exactly

which option has been implemented.

Table 1 - AT#UD Last Call Status Report Format

Key

6-F

value(s)

2 digits

Table 2

Table 3

Table 4

String

required

yes

Definition

Implemented

Diagnostic Command Specification revision number, digit.digit

Call Setup Result code

Multi-media mode

DTE-DCE interface mode

V.8 CM octet string, same format as V.25ter Annex A, in quotes

V.8 JM octet string, same format as V.25ter Annex A, in quotes

Reserved for call negotiation reports

Received signal power level, in –dBm (0-43)

0-A

0-1

yes

String

yes

2 digits

Note 4

2 digits

Note 4

Transmit signal power level, in –dBm (0-17)

Estimated noise level, in –dBm (10-90)

Normalized Mean Squared error, 100 (0x64) = minimum inter-symbol

distance

2 digits

4 digits

2 digits

Table 5

Note 4

Near echo loss, in units of dB

Far echo loss, in units of dB

Far echo delay, in units of ms

Round Trip delay, in units of ms

V.34 INFO bit map

19-1F

28-2F

Reserved for modulation setup and training reports (Note 5)

Transmit Carrier Negotiation Result

Receive Carrier Negotiation Result

Transmit Carrier symbol rate (0-8000)

Receive Carrier symbol rate (0-8000)

Transmit Carrier frequency (0-4000)

Receive Carrier frequency (0-4000)

Initial transmit carrier data rate (0-64000)

Initial receive carrier data rate (0-64000)

Reserved

Temporary carrier loss event count

Carrier Rate re-negotiation event count

Carrier Retrains requested

Carrier Retrain requests granted

Final transmit carrier rate

Table 6

4 digits

Note 6

0-1F40

0-FA0

0-FA00

2 digits

4 digits

0-FF

0-FA00

Final receive carrier rate

36-3F

Reserved

Protocol Negotiation Result (Note 7)

Table 7

0-2

Tables are numbered separately within this #UD section to be consistent with the Microsoft specification.

Notes refer to notes in the Microsoft specification

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Test and Debug AT Commands (continued)

3 digits

2 digits

Table 8

4 digits

0-400

0-FF

0-1

Error Control frame size

Error control link timeouts

Error control link NAKs

Compression Negotiation Result (Note 7)

Compression dictionary size (Note 7)

0-200

46-4F

5A-5F

Reserved

1 digit

0-2

Transmit flow control: 0 = off; 1 = DC1/DC3; 2 = V.24 ckt 106/133

Receive flow control: 0 = off; 1 = DC1/DC3; 2 = V.24 ckt 106/133

Transmit characters sent from DTE (Note 8)

Received characters sent to DTE (Note 8)

Transmit characters lost (data overrun errors from DTE) (Note 9)

Received characters lost (data overrun errors to DTE) (Note 9)

Transmit Frame count, if error control protocol running (Note 8)

Received Frame count, if error control protocol running (Note 8)

Transmit Frame error count, if error control protocol running (Note 9)

Received Frame error count, if error control protocol running (Note 9)

Reserved

8 digits

0-FFFFFFFF

0-FFFF

0-FFFFFFFF

0-FFFF

Tables 9-10

2 digits

Note 10

0-FF

Termination Cause

Call Waiting event count

62-7F

80-FF

Reserved for future versions of this specification

Reserved for manufacturer proprietary keys

Table 2 - Call Setup Result Codes

Code

Definition

Implemented

No previous call (modem log has been cleared since any previous calls)

No dial tone detected

Reorder signal detected, network busy

Busy signal detected

No recognized signal detected

Voice detected

C-F

Text telephone signal detected (see V.18)

Data Answering signal detected (e.g. V.25 ANS, V.8 ANSam)

Data Calling signal detected (e.g. V.25 CT, V.8 CI)

Fax Answering signal detected (e.g. T.30 CED, DIS)

Fax Calling signal detected (e.g. T.30 CNG)

V.8bis signal detected

Reserved

Table 6 - gstnModulationSchemeActive from 3.7.2/V.58

Value (hex)

Description

Implemented

V.17

V.21

V.22

V.22bis

V.23 Constant Carrier (1200/75)

V.23 Switched Carrier (half duplex)

V.26bis

V.26ter

V.27ter

V.29 HD

V.32

V.32bis

V.34

V.34 HD

V.pcm (asymmetric)

V.pcm (symmetric)

Reserved (V.58)

“X2™”

“K56FLEX™”

“V.FC”

E-7F

80-FF

“V.32terbo”

Reserved for mfgs

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AT Command Set

Test and Debug AT Commands (continued)

Table 7 - errorControl Active from 3.5.2/V.58

Value

3-7F

Description

Disable/none

V.42 LAPM

V.42 Alternative protocol (MNP™)

Reserved (V.58)

MNP10™

Implemented

ECP™ Enhanced Cellular Protocol

ETC

82-FF

Reserved for mfgs

Table 8 - compressionActive from 3.2.2/V.58

Value

Description

None

V.42bis

Implemented

2-7F

Reserved (V.58)

MNP5™

81-FF

Reserved for mfgs

Table 9 - Additional callCleared codes (3.6.4/V.58)

Code Definition

Implemented

No Previous call

Call is still in progress

Call Waiting signal detected

Delayed - see ETS 300 001

Table 10 - callCleared codes from 3.6.4/V.58-1994

callCleared: Indicates that the DCE has gone on hook and that the previously existing network connection has

been cleared. These values are hexadecimal, converted from decimal in V.58.

Value

1-3

Description

CauseUnidentified

See Table 9 above

NMSinitiatedDialCall

NMSinitiatedLeasedLineRestoral

NMSinitiatedRedial

NMSinitiatedDialDisconnect

PowerLoss

Notes

Call setup issues

Implemented

-- Network Management System

DCE

EquipmentFailure

FrontPanelDisconnectRequested

FrontPanelLeasedLineRestoral

AutomaticLeasedLineRestoral

InactivityTimerExpired

cct116RestoralRequest

cct108isOffInhibitsDial

cct108turnedOff

DTE Interface

Line Interface

NoNumberProvided

BlacklistedNumber

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Test and Debug AT Commands (continued)

CallAttemptsLimitExceeded

ExtensionPhoneOffHook

CallSetupFailTimerExpired

IncomingCallDetected

LoopCurrentInterrupted

NoDialTone

VoiceDetected

ReorderTone

SitTone

EngagedTone

LongSpaceDisconnect

CarrierLost

TrainingFailed

NoModulationinCommon

RetrainFailed

RetrainAttemptCountExceeded

GstnCleardownReceived

FaxDetected

InTestMode

IntrusiveSelfTestInitiated

AnyKeyAbort

DteHangupCommand

DteResetCommand

FrameReject

NoErrorControlEstablished

ProtocolViolation

Signal Converter

Test

Call Control

Error Control

n400exceeded

NegotiationFailed

DisconnectFrameReceived

SabmeFrameReceived

LossOfSynchronization

Data Compression

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AT Commands Reference S-Registers

S-registers generally affect how the AT commands perform. Contents of the registers can be displayed or

modified when the modem is in command mode.

To display the value of an S-register:

TYPE:

PRESS:

ATSn? where n is the register number.

Enter

To modify the value of an S-register:

TYPE: ATSn = r

where n is the register number, and r is the new register value.

PRESS:

Enter

Auto Answer Ring Number

This register determines the number of rings the modem will count before automatically answering a call. Enter 0

(zero) if you do not want the modem to automatically answer at all. When disabled, the modem can only answer

with an ATA command.

Range:

Default:

Units:

0—255

rings

Ring Counter

This register, Ring Counter, is read only. The value of S1 is incremented with each ring. If no rings occur over a

six second interval, this register is cleared.

Range:

Default:

Units:

0—255

rings

AT Escape Character (user defined)

This register determines the ASCII valued used for an escape sequence. The default is the + character. The

escape sequence allows the modem to exit data mode and enter command mode when on-line. Values greater

than 127 disable the escape sequence.

Range:

Default:

Units:

0—255

ASCII

Command Line Termination Character (user defined)

This register determines the ASCII values as the carriage return character. This character is used to end

command lines and result codes.

Range:

Default:

Units:

0—127, ASCII decimal

13 (carriage return)

ASCII

Note: This register value is not stored with &W command.

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AT Commands Reference S-Registers (continued)

Response Formatting Character (user defined)

This register determines the ASCII value used as the line feed character. The modem uses a line feed character

in command mode when it responds to the computer.

Range:

Default:

Units:

0—127, ASCII decimal

10 (line feed)

ASCII

Note: This register value is not stored with &W command.

S5 Command Line Editing Character (user defined)

This register sets the character recognized as a backspace and pertains to asynchronous only. The modem will

not recognize the backspace character if it is set to a value that is greater than 32 ASCII. This character can be

used to edit a command line. When the echo command is enabled, the modem echoes back to the local DTE the

backspace character, an ASCII space character, and a second backspace character. This means a total of three

characters are transmitted each time the modem processes the backspace character.

Range:

Default:

Units:

0—127, ASCII decimal

8 (backspace)

ASCII

Note: This register value is not stored with &W command.

S6 Wait Before Dialing

This register sets the length of time, in seconds, that the modem must wait (pause) after going off-hook before

dialing the first digit of the telephone number. The modem always pauses for a minimum of two seconds, even if

the value of S6 is less that two seconds. The wait for dial tone call progress feature (W dial modifier in the dial

string) will override the value in register S6. This operation, however, may be affected by some ATX options

according to country restrictions.

Range:

Default:

Units:

2—65

seconds

Connection Completion Time-Out

This register sets the time, in seconds, that the modem must wait before hanging up because carrier is not

detected. The timer is started when the modem finishes dialing (originate), or goes off-hook (answer). In

originate mode, the timer is reset upon detection of an answer tone if allowed by country restriction. The timer

also specifies the wait for silence time for the @ dial modifier in seconds. S7 is not associated with the W dial

modifier.

Range:

Default:

Units:

1—255

seconds

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AT Command Set

AT Commands Reference S-Registers (continued)

Comma Dial Modifier Time

This register sets the time, in seconds, that the modem must pause when it encounters a comma (,) in the dial

command string.

Range:

Default:

Units:

0—65

seconds

S10

Automatic Disconnect Delay

This register sets the length of time, in tenths of a second, that the modem waits before hanging up after a loss of

carrier. This allows for a temporary carrier loss without causing the local modem to disconnect.

The actual interval the modem waits before disconnecting is the value in register S10.

Range:

Default:

Units:

1—254

.1 seconds

S11

DTMF Dialing Speed

This register determines the dialing speed which is prefixed for each country.

Range:

Default:

Units:

50—150

.001 seconds

S12

Escape Guard Time

This register sets the value (in 20 ms increments) for the required pause after the escape sequence (default 1 s).

Range:

Default:

Units:

0—255

.02 seconds

S14

General Bit Mapped Options Status

Indicates the status of command options. Only bit 3 and bit 6 are used, read-only.

Bit 3

Result codes (Vn)

0 = Numeric (V0)

1 = Verbose (Vl) (Default)

Pulse dial PPS selection (&Pn)

Bit 6

0 = 10 PPS (&p0, &p1) (Default)

1 = 20 PPS (&p2)

Default:

8 (00001000b)

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AT Commands Reference S-Registers (continued)

S21

V.24/General Bit Mapped Options Status

Indicates the status of command options. Only bits 3, 4 and 5 are used, read-only.

Bits 3-4

DTR behavior (&Dn)

0 = &D0 selected

1 = &D1 selected

2 = &D2 selected (Default)

3 = &D3 selected

Bit 5

DCD behavior (&Cn)

0 = &C0 selected

1 = &C1 selected (Default)

48 (00110000b)

Default:

S22

Results Bit Mapped Options Status

Indicates the status of command options. Only bits 4, 5 and 6 are used, read only.

Bits 4-6

result codes (Xn)

0 = X0 selected

4 = X1 selected

5 = X2 selected

6 = X3 selected

7 = X4 selected (Default)

Bit 7

Pulse dial make/break ratio (&Pn)

0 = 33/67 make/break ratio (&P1, &P2) (Default)

1 = 39/61 make/break ratio (&P0)

112 (01110000b)

Default:

S24

Timer to Control Sleep Mode

This command displays the number of seconds of inactivity (no characters sent from the DTE, no RING) in the

off-line command state before the modem places itself into standby mode. A value of zero prevents standby

mode. S24 is an alias for S89.

Note: If a number between 1 and 4 is entered for this register, it will set the value to 5, and the inactivity before

standby will be 5 seconds. This is done for compatibility with previous products which allowed time-outs

down to 1 s.

Range:

Default:

0, 5—65

S28

V.34 Modulation Enable/Disable

This register enables/disables V.34 modulation.

0 = disabled, 1 = enabled

Range:

Default:

0 —1

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AT Command Set

AT Commands Reference S-Registers (continued)

S30

Inactivity Timer

S30 specifies the length of time (in minutes) that the modem will wait before disconnecting when no data is sent

or received. This function is only applicable to buffer mode..

Range:

Default:

0—255

S32

Synthetic Ring Volume

This register specifies a synthetic ring volume.

Range:

Default:

0—255 (allowed, but not meaningful)

S33

Synthetic Ring Frequency

This register specifies a synthetic ring frequency. There are five choices, with 0 meaning disabled.

Range:

Default:

0—5

S35

Data Calling Tone

Data Calling Tone is a tone of certain frequency and cadence as specified in V.25 which allows remote

Data/FAX/Voice discrimination. The frequency is 1300 Hz with a cadence of .5 s on and 2 s off.

0 = disabled, 1 = enabled

Range:

Default:

0—1

S37

Dial Line Rate (default 0)

This register sets the maximum line data rate. In K56flex and V.90 mode, S37 controls the upstream V.34 rate.

S37 = 0

S37 = 1

S37 = 2

S37 = 3

S37 = 4

S37 = 5

S37 = 6

S37 = 7

S37 = 8

S37 = 9

S37 = 10

S37 = 11

S37 = 12

S37 = 13

S37 = 14

S37 = 15

S37 = 16

S37 = 17

S37 = 18

S37 = 19

auto rate

reserved

1200/75 bit/s (V.23)

300 bit/s

reserved

1200 bit/s

2400 bit/s

4800 bit/s

7200 bit/s

9600 bit/s

12000 bit/s

14400 bit/s

16800 bit/s

19200 bit/s

21600 bit/s

24000 bit/s

26400 bit/s

28800 bit/s

31200 bit/s

33600 bit/s

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AT Commands Reference S-Registers (continued)

S38

K56flex Downstream Rate

To force a particular K56flex downstream rate, use S-register S38. S38=0 disables K56flex, and may allow a

more reliable V.34 connection. S38=1 default allows the modem to select the downstream rate automatically.

Other values of S38 force the downstream rate, with fallback to V.34 if unsuccessful at the configured rate:

S38=0

S38=1

S38=2

S38=3

S38=4

S38=5

S38=6

S38=7

S38=8

S38=9

S38=10

S38=11

S38=12

S38=13

S38=14

Disable K56flex

Automatic rate selection (default)

32 kbit/s

34 kbit/s

36 kbit/s

38 kbit/s

40 kbit/s

42 kbit/s

44 kbit/s

46 kbit/s

48 kbit/s

50 kbit/s

52 kbit/s

54 kbit/s

56 kbit/s

The number of robbed-bit signaling (RBS) frames detected decreases the true DCE rate per the following table:

RBS links Rate hit (kbit/s)

For example, if S38=10 and there are 3 RBS links, the K56flex downstream rate will be 48-4=44 kbit/s. The

exception to this is for 32 kbit/s and 34 kbit/s, which are the true rates regardless of the number of RBS frames

detected.

One special value of S38, S38 = 251, is used for back-to-back (factory) testing of V.34 rates, with DSP code

running in external memory. Set S38=251 on both originating and answering modems. (This feature is not valid

with ramless solution.)

S42

Auto Rate (default 1, range 0 1)

This command is used for testing and debugging only.

V.32bis and V.22bis auto rate is disabled. Retrain operation is disabled or enabled in data mode, and fallback is

disabled in data mode. In K56flex mode, S42=0 forces connection at the rate specified by S38 (even if the rate

cannot be sustained), without fallback to V.34.

0 = auto rate disabled, 1 = enabled.

Range:

Default:

0—1

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AT Command Set

AT Commands Reference S-Registers (continued)

S43

Auto Mode (default 1, range 0 1)

This command is used for testing and debugging only.

V.32bis startup auto mode operation disabled.

0 = auto mode disabled, 1 = enabled.

Range:

Default:

0—1

S48

LAPM Error Control and Feature Negotiation (default 7)

S48 = 7

Negotiation enabled

S48 = 128

Negotiation disabled; forces immediate fallback options specified in S36

The following chart lists the S36 and S48 configuration settings necessary to negotiate certain types of

connections:

S48 = 7

S48 = 128

S36 = 0, 2

S36 = 1, 3

S36 = 4, 6

S36 = 5, 7

LAPM or hangup

LAPM or async

LAPM, MNP, or hangup

do not use

async

MNP or hangup

MNP or async

LAPM, MNP, or async

S89

Timer to Control Sleep Mode

This command displays the number of seconds of inactivity (no characters sent from the DTE, no RING) in the

off-line command state before the modem places itself into standby mode. A value of zero prevents standby

mode.

Note: If a number between 1 and 4 is entered for this register, it will set the value to 5, and the inactivity before

standby will be 5 seconds. This is done for compatibility with previous products which allowed time-outs

down to 1 s.

Range:

Default:

0, 5—65

S90

Read-only Local Phone

This register tells the status of the Local Phone. It is read-only.

0 = on-hook

1 = off-hook

S91

Line Transmit Level

This register is effective only for Japan. It specifies the line transmit level in dBm with an implied minus sign.

Range:

Default:

Units:

6—15

1 dB

S108

Network Codec Type

S108=22

S108=33

µ-Law

A-law

S108=7 default, or any other value: Coding as specified by digital modem in V.8bis information. If an old server

does not tell its code type in V.8bis, then the client modem chooses based on its country ID. µ-law regions are

Japan, Taiwan, Korea, Hong Kong, North America, and Latin America. Everywhere else is A-law. (This S –

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AT FAX Command Set (Class 1 FAX)

The Lucent Technologies modem supports FAX commands conforming to EIA standard 578. These commands

are given here with short descriptions; complete explanations are given in the standard, available from the

Electronic Industries Association.

Table 5. The AT FAX Command Set Summary

Command

Description

+FCLASS?

+FCLASS = ?

+FCLASS = n

+FTS = <n>

+FRS = <n>

+FTM = <m>

+FRM = <m>

+FTH = <m>

+FRH = <m>

+FTM = ?

+FRM = ?

+FTH = ?

Service class indication

Service class capabilities

Service class selection

Transmission silence

Receive silence

Transmit FAX data with <m> carrier

Receive FAX data with <m> carrier

Transmit HDLC data with <m> carrier

Receive HDLC data with <m> carrier

Transmit FAX modulation

Receive FAX modulation

Transmit HDLC Data modulation

Receive HDLC Data modulation

Manufacturer Identification

+FRH = ?

+FMI?

+FMM?

Product Identification

+FMR?

Version/Revision Information

+FPR = <n>

+FPR = ?

Set DTE-DCE Fax port rate

Reports all fax port rate that DCE supports

Reports the current fax port rate of DTE-DCE

Set DCE Adaptive answer mode

Display valid adaptive answer values that DCE supports

Display current set value of adaptive answer mode

+FPR?

+FAA = <n>

+FAA = ?

+FAA?

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AT FAX Commands Reference

+FCLASS?

Service Class Indication

This command causes the modem to display the current setting. The modem can operate either as a Class 0

data modem or a class 1 FAX modem.

Typical responses:

+FCLASS?

000 if in data mode; 001 if in FAX class 1, 008 if in voice mode, and 080

if in

VoiceView^†mode.

+FCLASS=? Service Class Capabilities

This command causes the modem to display the classes it supports.

Typical responses:

+FCLASS = ? 0, 1, 8, 80

+FCLASS=n Service Class Selection

This command sets the modem for class n operation, where n is either a 0 or 1.

Parameters:

Default:

0, 1, 8, 80

Command options:

+FCLASS = 0 Select data mode.

+FCLASS = 1 Select Facsimile Class 1.

+FCLASS = 8 Select voice mode.

+FLCASS = 80 Select VoiceView mode.

+FTS=<n>

Transmission Silence

This command causes the modem to stop transmitting data and pause for 10 * n ms. At the end of this period,

the modem then responds OK. You can specify any number from 0 through 255 as the value of n; for example, a

value of 5 specifies a period of 50 ms.

n = 0 255 (10 ms intervals)

+FRS=<n>

Receive Silence

This command causes the modem to listen and wait for a 10 * n ms period of silence on the line. At the end of

this period, the modem then responds OK. You can specify any number from 0 through 255 as the value of n; for

example, a value of 5 specifies a period of 50 ms.

n = 0 255 (10 ms intervals)

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AT Fax Commands Reference (continued)

+FTM=<m>

Transmit FAX Data with <m> Carrier

This command causes the modem to transmit data at the modulation specified by <m>. The following table

shows the values you can enter for this command and the meaning of those values.

Command Option

Modulation

Speed (bits/s)

+FTM=3

+FTM=24

+FTM=48

+FTM=72

+FTM=96

+FTM=73

+FTM=74

+FTM=97

+FTM=98

+FTM=121

+FTM=122

+FTM=145

+FTM=146

V.21 Channel 2

V.27ter

300

2400

4800

7200

9600

7200

9600

12000

14400

V.27ter

V.29

V.17

V.17 (short train)

V.17

V.17 (short train)

V.17

V.17 (short train)

V.17

V.17 (short train)

+FRM=<m>

Receive FAX Data with <m> Carrier

This command causes the modem to receive data at the modulation specified by <m>.

Command Option

Modulation

Speed (bits/s)

+FRM=3

+FRM=24

+FRM=48

+FRM=72

+FRM=96

+FRM=73

+FRM=74

+FRM=97

+FRM=98

+FRM=121

+FRM=122

+FRM=145

+FRM=146

V.21 Channel 2

V.27ter

300

2400

4800

7200

9600

7200

9600

12000

14400

V.27ter

V.29

V.17

V.17 (short train)

V.17

V.17 (short train)

V.17

V.17 (short train)

V.17

V.17 (short train)

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AT Command Set

AT Fax Commands Reference (continued)

+FTH=<m>

Transmit HDLC Data with <m> Carrier

This command causes the modem to transmit data framed in the HDLC protocol at the modulation specified

by <m>.

Command Option

Modulation

Speed (bits/s)

+FTH=3

+FTH=24

+FTH=48

+FTH=72

+FTH=96

+FTH=73

+FTH=74

+FTH=97

+FTH=98

+FTH=121

+FTH=122

+FTH=145

+FTH=146

V.21 Channel 2

V.27ter

300

2400

4800

7200

9600

7200

9600

12000

14400

V.27ter

V.29

V.17

V.17 (short train)

V.17

V.17 (short train)

V.17

V.17 (short train)

V.17

V.17 (short train)

+FRH=<m>

Receive HDLC Data with <m> Carrier

This command causes the modem to receive data framed in the HDLC protocol at the modulation specified

by <m>.

Command Option

Modulation

Speed

(bits/s)

+FRH=3

+FRH=24

+FRH=48

+FRH=72

+FRH=96

+FRH=73

+FRH=74

+FRH=97

+FRH=98

+FRH=121

+FRH=122

+FRH=145

+FRH=146

V.21 Channel 2

V.27ter

300

2400

4800

7200

9600

7200

9600

12000

14400

V.27ter

V.29

V.17

V.17 (short train)

V.17

V.17 (short train)

V.17

V.17 (short train)

V.17

V.17 (short train)

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AT Fax Commands Reference (continued)

+FPR=<n>

Select Fax port rate

This command sets the DTE to DCE fax port rate.

DTE command

DCE action

Description or notes

•FPR • 0

•FPR • 1

•FPR • 2

•FPR • 4

•FPR • 8

•FPR • 10

•FPR • 18

Execute •IPR • 0

Select automatic rate detection

Set DTE-DCE to 2400 bit/s

Execute •IPR • 2400

Execute •IPR • 4800

Execute •IPR • 9600

Execute •IPR • 19 200

Execute •IPR • 38 400

Execute •IPR • 57 600

Report (0,1,2,4,8,10,18)

Set DTE-DCE rate to 4800 bit/s

Set DTE-DCE rate to 9600 bit/s

Set DTE-DCE rate to 19 200 bit/s

Set DTE-DCE rate to 38 400 bit/s

Set DTE-DCE rate to 57 600 bit/s

•FPR • ? (if all values listed above

are supported)

DCE supports 2400, 4800, 9600, 19 200,

38 400

and 57 600 bit/s

•FPR? (if •IPR • 0)

Report 0

Report 1

Report 2

Report 4

Report 8

Report 10

Report 18

Report 255

DTE-DCE rate is automatically detected

DTE-DCE rate is 2400 bit/s

DTE-DCE rate is 4800 bit/s

DTE-DCE rate is 9600 bit/s

DTE-DCE rate is 19 200 bit/s

DTE-DCE rate is 38 400 bit/s

DTE-DCE rate is 57 600 bit/s

255 indicates invalid setting

•FPR? (if •IFC • 2400)

•FPR? (if •IFC • 4800)

•FPR? (if •IFC • 9600)

•FPR? (if •IFC • 19 200)

•FPR? (if •IFC • 38 400)

•FPR? (if •IFC • 57 600)

•FPR? (all other •IPR settings)

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AT Command Set

AT Fax Commands Reference (continued)

+FAA Adaptive answer

A Service Class 1 Facsimile DCE may have the ability to answer as a data modem DCE or as a Facsimile DCE. It

also may be able to adaptively change from Class 1 facsimile mode (•FCLASS•1.0) to data modem operation

(•FCLASS•0) in response to the incoming call. The •FAA parameter controls this feature.

–

Write syntax:

Valid values:

Default value:

Mandatory value:

•FAA•<value>

0, 1

•FAA•0

•FAA•1

The DCE shall answer only as a Class 1 facsimile device. No automatic switching of service class

shall occur based on the calling device type.

The DCE can answer and automatically determine whether to answer as a facsimile DCE or as a

data modem. If a data modem is detected, the DCE shall operate as described in 8.3.2.4.

NOTE – The •FAA parameter controls automatic switching only from Class 1 to Class 0, for call answering only. It

does not affect call origination, switching to Class 1 from other classes, or switching to classes other than Class 0.

Manufacturer Identification (+FMI)

Read Syntax: AT+FMI

Result:

Lucent Data/Fax

Lucent Data/Fax/Voice/VoiceView (depending on product)

Product Identification (+FMM)

Read Syntax: AT+FMM

Result:

Data/Fax

Data/Fax/Voice/VoiceView (depending on product)

Version / Revision Information (+FMR)

Read Syntax: AT+FMR

Result:

Lucent driver version number (e.g. 1.5.05)

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AT Voice Command Set

The AT Voice Command set follows a modified IS-101 architecture. The commands are sent through the comm

port, but the data path is sent either through the comm port or through a DMA channel using the wave driver.

Tables 1 and 2 show a summary of the AT Voice Command Set.

Summary of the AT Voice Command Set

Table 6. The AT Voice Command Set

Voice Commands

Command

AT+FCLASS=8

Description

Enter voice mode

AT+VIP

Initialize voice parameters

Caller ID

AT+VCID

AT+VDR

AT+VGT

AT+VIT

Distinctive ring

Speaker volume control

DTE/DCE inactivity timer

Automatic hang-up control

AT+VNH

AT+VTD

AT+VLS

AT+VSD

AT+VRA

AT+VRN

AT+VTS

AT+VTR

AT+VTX

AT+VRX

AT+VSM

AT+VEM

AT+VGR

AT+VPR

Set beep tone duration timer

Analog source/destination selection and DTMF/tone reporting

Set silence detection timer

Set ringback goes away timer

Set ringback never came timer

DTMF/tone generation

Start full duplex voice transmission and reception process

Enter voice transmit state (see examples)

Enter voice receive state (see examples)

Voice compression method

Event reporting and masking

Receive gain selection

Select DTE/DCE interface rate

Table 7. The AT Voice Command Set Not Defined In IS-101 Specification

Command

Description

ATS32

ATS33

Synthetic ring volume

Synthesized ring frequency

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AT Voice Commands Reference

AT+FCLASS=8

Enter Voice Mode

The command AT+FCLASS=8 puts the modem in voice mode. Speakerphone and TAD modes are subsumed

under the more general heading of voice mode, and use a particular subset of voice mode commands to

implement their respective features and functions.

The modem controller will maintain the overall state of the system so as to know when voice commands are

issued in the context of using the speakerphone versus TAD or other voice contexts.

AT+FCLASS?

AT+FCLASS=?

Returns the current DCE mode

Queries the DCE for the range of modes supported DCE returns: 0, 1, 8, 80 (data, FAX,

voice, VoiceView)

AT+VIP

Initialize Voice Parameters

The command AT+VIP causes the modem to initialize all the voice parameters to their default values. The

command has no effect on the +FCLASS setting.

AT+VCID=<pmode> Caller ID

With this command caller identification is enabled/disabled.

• Disable caller ID:

<pmode>=0

• Enable, formatted caller report: <pmode>=1

• Enable, unformatted caller report: <pmode>=2

AT+VCID?

Returns the current caller ID pmode

AT+VCID=?

Queries the DCE for the range of supported caller ID report formats DCE returns: 0, 1, 2

AT+VDR=<enable>,<report>

Distinctive Ringing & Cadence Report

This command will enable the distinctive ringing feature. This will allow a report of DROF/DRON to follow an

exact ring cadence coming over the phone line.

AT+VDR?

Returns the current values of <enable> and <report

AT+VDR=?

Queries the DCE for the range of supported distinctive ring configurations DCE

(0 255)

returns: (0, 1),

AT+VGT=<level>

Speaker Volume Control

This command will enable the speaker volume control.

✟ <level> is 0 255

✟ <level>=128: Nominal volume level for sending to speaker

✟ <level>=<value greater than 128>: Increase volume above nominal level

✟ <level>=<value less than 128>: Decrease volume below nominal level

AT+VGT?

Returns current value

AT+VGT=?

Returns range of supported values

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AT Voice Commands Reference (continued)

AT+VGR=<gain>

Receive Gain Selection

This command will enable the receive microphone gain control.

✟ <gain> is 0 255: the only useful range is 121—134

✟ <gain>=128: nominal level for receive gain from microphone

✟ <gain>=<value greater than 128>: increase gain above nominal level

✟ <gain>=<value less than 128>: decrease gain below nominal level

TAD mode—This command may be used in TAD local recording to control the recording level from the

microphone.

Speakerphone mode—This command may be used to control the gain to the remote caller.

AT+VGR?

Returns current value of receive gain

Returns range of supported gain values

AT+VGR=?

AT+VEM=<mask>

Event Reporting and Masking

The DTE can use this command to disable an event report regardless of the DCE state, or of the analog signal

source or destination configuration. Mask is Bits 0—33 (i.e., FFFFFFFFC). See the IS-101 specification for

defined bit values.

AT+VEM?

Returns the current values of the mask

AT+VEM=?

Queries the DCE for the range of supported service level events

AT+VIT = <Timer>

DTE/DCE Inactivity Timer

This command sets the DCE’s value for the DTE/DCE inactivity timer. The units are in one seconds.

AT+VIT?

Returns the current value of the timer

AT+VIT=?

Queries the DCE for the range of supported values

AT+VNH = <Hook>

Automatic Hang-up Control

This command causes the DCE to enable or disable automatic hangups in the data and facsimile modes. See

the IS-101 specification for the detailed description of this command and its interaction with the +FCLASS and

ATH commands.

✟

<hook> = 0 The DCE retains automatic hangups (which is the way in the other non-voice modes).

✟

<hook> = 2 The DCE disables automatic hangups in the other non-voice modes. The DTE only performs a

logical hangup (returns the “OK” result code).

AT+VNH?

Returns the current value

AT+VNH=?

Returns the supported values

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AT Command Set

AT Voice Commands Reference (continued)

AT Commands: Speakerphone Operation

AT+VLS=<label>

Analog Source/Destination Selection

This is a general purpose analog source/destination command that attaches various analog devices to the system

in voice mode.

✟ Speakerphone on: AT+VLS=7.

Attach internal speaker and internal microphone, DCE off-hook.

✟ Speakerphone off: AT+VLS=0.

Detach analog devices, DCE on-hook.

✟ Microphone Control/Phone Muting:

AT+VLS=5 disables/detaches microphone analog source (leaving speaker only) when speakerphone is in

operation (phone mute feature).

AT+VLS=7 restores/attaches microphone along with speaker (normal speakerphone operation).

AT+VLS?

Reports the current analog source/destination configuration, along with a listing of all event codes

reported from the modem to the DTE under that configuration.

AT+VLS=?

Queries the DCE for the range of supported configurations and the list of unsolicited event codes

that the modem will report to the DTE under each configuration. For speakerphone, the

configurations supported are 0, 5, and 7 as explained above.

AT Commands: Telephone Answering Device

AT+VTD=<dur>

Beep Tone Duration Timer

This command sets the default duration for DTMF/tone generation in 0.01 s increments.

For DTMF digits, beep tone duration is the interdigit time. For tone generation, this number is the actual tone

duration.

AT+VTS=<string>

DTMF and Tone Generation in Voice Mode

This command will cause the modem to produce a sequence of DTMF tones (or other tones, such as dial tone,

busy, silence, etc.) as specified in the string parameter. Specifications for the format of tone strings are detailed

in IS-101.

■ AT+VTS? reports the current <string> parameter.

■ AT+VTS=? reports the range of frequencies supported for tone generation, as well as tone duration.

Example: (200 3300), (200 3300), (0 500).

AT+VTR

Start voice transmission and reception process

This command will cause DCE to start full duplex voice mode. In this mode, the DTE selects the analog source

and sink through the +VLS command; the selections can be microphone and speaker or GSTN. The DCE is not

required to perform any Acoustic Echo Cancellation nor any Line Echo Cancellation.

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AT Voice Commands Reference (continued)

AT+VLS=?

Analog Source/Destination Selection and DTMF/Tone Reporting

Requests for the modem's DTMF/Tone reporting capabilities are made using this command. For each system

configuration in voice mode (i.e., speakerphone and answering machine), the modem reports the capabilities that

are enabled for the configuration.

Also, for each configuration, the modem indicates tone-reporting capabilities for each of the three different voice

states: voice transmit data, voice receive data, and voice command state (voice idle).

TAD supports each of the following IS-101 analog source/destination configurations:

Label #

Description

DCE on-hook, local phone connected to Telco.

DCE off-hook, DCE connected to Telco.

DCE off-hook, local phone connected to DCE.

DCE off-hook, local phone connected to Telco, DCE to local phone.

Speaker connected to DCE, DCE on-hook (playback messages)

Speaker connected to DCE, DCE off-hook (call screening)

Microphone connected to DCE, DCE on-hook (record greeting)

Microphone and speaker connected, DCE off-hook (speakerphone)

AT+VSD=<sds, sdi> Silence Detection (QUIET and SILENCE)

This command sets both the silence detection sensitivity (<sds>) and silence detection interval (<sdi>).

■ Larger values of <sds> indicate that the modem is to treat noisier line conditions as silence.

<sds> = 128 ; Nominal level of sensitivity; −40 dBm (default) .

<sds> > 128 ; More aggressive ; <sds>=129 is −39 dBm.

<sds> < 128 ; Less aggressive; <sds>=127 is −41 dBm.

■ The <sdi> specifies the amount of time the modem shall wait before reporting silence to the DTE. It is used for

determining :

Presumed hang-up (SILENCE), after which the modem sends <DLE>-s to DTE.

Default is 5 seconds.

AT+VSM=<cml>,<vsr>

Compression Method and Sampling Rate Specifications

This command enables the compression method and sampling specifications where cml = compression method

label and vsr = voice sampling rate.

AT+VSM?

Returns the numeric and string labels of the compression method currently in use, and the

sampling rate currently in use.

AT+VSM=?

Reports the voice compression methods supported by the DCE, and the voice sampling rates at

which they are supported: The default is 129,8000 (16-bit linear, 8.0 kHz )

✟ 128, 8-bit linear, (7200, 8000, 11025)

✟ 129, 16-bit linear, (7200, 8000, 11025)

✟ 130, 8-bit A-law, (8000)

✟ 131, 8-bit µ-law, (8000)

✟ 132, IMA ADPCM, (8000)

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AT Command Set

AT Voice Commands Reference (continued)

AT+VRA=<interval> Ringback Goes Away Timer

The modem uses the ringback goes away timer when originating a call.

This command sets this timer to the amount of time the modem shall wait between ringbacks before assuming

that the remote station has gone off-hook.

AT+VRA?

Returns the current value.

AT+VRA=?

Returns the range of supported values.

AT+VRN=<interval> Ringback Never Appeared Timer

The modem uses the ringback never appeared timer when originating a call.

The AT+VRN command sets this timer to the amount of time that the modem shall spend looking for an initial

ringback. If ringback is not detected within this interval, the modem shall assume that the remote station has

gone off-hook.

AT+VRN?

Returns the current value.

AT+VRN=?

Returns the supported values.

AT+VPR=<rate>

Select DTE/DCE Interface Rate

The AT+VPR command returns an OK for any rate but has no action.

Events Reported to the DTE :

The modem will return OK when going off-hook in voice mode (+FCLASS=8). After answering in voice mode, the

modem may send any of the following <DLE> shielded event codes to the DTE, as appropriate:

<DLE> Shielded Codes Sent from DCE to DTE

Code Character

Description

9, A D, #, *

DTMF tones

Answer tone

Busy tone

Fax calling tone

Dial tone

Data calling tone

Local phone on-hook

Local phone off-hook

Ring

Silence timer has expired

End of voice data transmission

CAS tone detected

<ETX>

<DLE> Codes Sent to DCE:

For simple actions in voice mode, the modem may send any of the following <DLE> shielded event codes

(in ASCII) to the DTE, as appropriate:

<DLE> Shielded Codes Sent from DTE to DCE

Code Character

Description

Bump up the volume by 1 dB

Bump down the volume by 1 dB

End of voice data transmission

End receive data state

<ETX>

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AT Voice Commands Reference (continued)

AT Voice Command Set Not Defined In IS-101 Specifications

S32

This command will provide a synthetic ring volume in dB with an implied minus sign. The default = 10.

S33 Synthetic Ring Frequency

Synthetic Ring Volume

This command will provide a synthetic ring frequency. The valid values are 0 5, with 0 = disabled and 1 5 =

five varying ring frequencies. The default = 0.

AT+VTS=!

This does a flash hook.

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Host-Based Controller Modem

AT Command Set

AT Voice Commands Reference (continued)

Voice Modem Command Examples

The application issues AT commands to request actions by the modem, and the modem responds with standard

TIA-602 result codes to tell the application that the requested action has been completed.

Notes for Speakerphone Examples

1. If the user decides to pick up his local (parallel) phone while in the middle of a speakerphone call, the DCE will

sense the transition and send the application a <DLE>-H sequence. The application which should always be

screening for DLE-shielded codes in the background when the modem is in the voice mode can then respond

to the <DLE>-H (for example, by resetting speakerphone buttons or doing whatever else needs to be done with

the speakerphone interface).

2. DLE-shielded codes that the modem will send to the application while in speakerphone mode are:

Command

DLE - c

Description

FAX calling tone detect.

DLE - e

DLE - h

DLE - H

Data calling tone detect.

Local phone went on-hook (hung up).

Local phone went off-hook (picked up).

3. When the user is in the middle of a speakerphone call, call waiting (hold operation) can be initiated when the

user hears the call-waiting signal through the speaker. Call waiting entails the following communication

between the application and the modem.

Command

ATD!

Description

Put the current call on hold, and answer the new incoming call.

DCE responds. Original call is on hold, and the speakerphone user is connected

to the second call.

To terminate the second call and return to the first, the application should again send the modem the

ATD! command.

ATD!

Terminate the second call and return to the original call.

DCE responds. Second call is terminated and the user is again connected to the

original call.

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AT Voice Commands Reference (continued)

Example # 1: Initiating a speakerphone call (with phone muting during conversation)

The speakerphone application is loaded. The modem is initially idle, in data mode. The user then decides to pick

up the phone to place a speakerphone call. Picking up the phone should initiate the following chain of events.

Command

AT+FCLASS=8

Description

The modem enters voice mode.

DCE responds. Now in voice mode.

Set speaker volume to normal level.

DCE responds. Volume level is set.

Attach internal speaker and microphone, DCE off-hook.

AT+VGT=128

AT+VLS=7

DCE responds. Now in speakerphone mode. Phone off hook, dial tone audible,

speaker and microphone ready to use.

ATD5551234

Provide dial string for DCE to place the call.

DCE responds. Number is dialed.

Call is placed through phone network. Caller can hear ringback or busy signal from the phone being called. If the

person at the other end picks up the phone, caller and callee converse. If the speakerphone user decides to

mute his speakerphone, the application sends the following to mute the speakerphone.

Command

AT+VLS=5

Description

Enter Mute Mode. Mic is disconnected from the line, leaving the speaker only.

DCE responds. The mic is no longer connected to the line, and the

speakerphone is mute.

After a while, the speakerphone user decides to turn the mic back on (mute off). This is done when the

application issues the following command.

Command

AT+VLS=7

Description

No Mute. Microphone is reattached to system along with speaker.

DCE responds. Speakerphone with both mic and speaker is operational.

Conversation ends, and user hangs up.

Command

ATH

Description

Application tells the modem to terminate the call with standard AT command.

DCE responds.

Speakerphone is now on-hook. The speaker and mic have been detached from the system, and the modem

is now in data mode (+FCLASS=0).

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AT Command Set

AT Voice Commands Reference (continued)

Example # 2: Initiating a stored number speakerphone call

The speakerphone application is loaded. The modem is initially idle, in data mode. The user then decides to

place a speakerphone call either by entering the number without going off-hook first or selecting a number

previously stored in the application. When the user tells the application to dial, the following events occur:

Command

Description

ATD5551234;

Provide a dial string appended with a semicolon (;) for the DCE to place the call

and go to command mode.

The DCE responds, and the number is dialed.

The call is placed through the phone network in data mode. The modem stays in command mode, and the

application should wait for the OK before sending next command.

Command

Description

AT+FCLASS=8

AT+VGT=128

Put the modem into voice mode.

DCE responds: The modem is now in voice mode.

Set the speaker volume to normal level.

DCE responds: The volume level is set.

AT+VLS=7

Start the speakerphone by attaching the internal speaker and mic to the line;

DCE off-hook.

DCE responds: Speakerphone mode is active. The phone is off hook; dial tone is

audible, and the speaker and mic are ready to use.

The caller can hear ringback or busy signal from the phone being called. If the person at the other end picks up,

the caller and callee converse.

The conversation ends, and the speakerphone user hangs up.

Command

Description

ATH

The application tells the modem to terminate the call with a standard

AT command.

DCE responds: The speakerphone is now on-hook. The speaker and

microphone have been detached from the system, and the modem is now in

data mode (+FCLASS = 0).

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AT Voice Commands Reference (continued)

Example # 3: Answering a speakerphone call

The speakerphone application is loaded. The modem is initially idle, in data mode. In this mode, the modem is

always screening for incoming calls.

Command

Description

RING

DCE reports ringing from remote station. The user decides to pick-up the

phone, which should initiate the following:

AT+FCLASS=8

Modem enters voice mode.

DCE responds. Now in voice mode.

Speaker volume set to normal.

DCE responds. Volume level is set.

AT+VGT=128

AT+VLS=7

Call is answered: Attach internal speaker and microphone to the line, DCE

off-hook.

DCE responds. Now in speakerphone mode, connected to the line

(call is answered).

Speakerphone user picks up the phone and hears the caller from the other end. Conversation continues for

awhile. When it ends, the speakerphone user hangs up.

Command

ATH

Description

DTE issues standard command to terminate call.

DCE responds. Speakerphone goes on-hook. Speaker and microphone are

detached from system, and modem returns to data mode (+FCLASS=0).

Note 1: When the local phone goes off-hook in the middle of a speakerphone call, the speakerphone

disconnects, and the DCE returns <DLE>-H to the DTE.

Note 2: When the speakerphone is on, call waiting (hold operation) is initiated by:

Command

ATD!

Description

DTE sends hold command to DCE.

DCE responds.

Example # 4: Receiving an incoming FAX call in speakerphone or TAD mode and switching to FAX mode

In this example, the sequence begins at the point of the user or telephone answering device (TAD) taking the

speakerphone off-hook and detecting a FAX calling tone from the other end.

Command

Description

<DLE>-c

DCE detects FAX calling tone from the remote FAX and informs the application

by sending DLE-c sequence.

AT+FCLASS=1

Application switches modem out of voice mode, and into FAX mode.

DCE responds. Now in FAX mode, still off-hook and connected to incoming call.

Application instructs modem to answer FAX call using standard AT commands.

ATA

DCE responds. The call is answered, and modem continues with procedures to

establish connection and receive FAX transmission. The application software

will then take care of disconnecting the call when the FAX is done, and returns to

data mode (+FCLASS=0).

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AT Command Set

AT Voice Commands Reference (continued)

Example # 5: Receiving an incoming data call in speakerphone or TAD mode and switching to data mode

In this example, the sequence begins at the point of the user or telephone answering device (TAD) taking the

speakerphone off-hook and detecting a data calling tone from the other end.

Command

Description

<DLE>-e

DCE detects data calling tone from the remote modem and informs the

application by sending DLE-e sequence.

AT+FCLASS=0

Application switches modem out of voice mode, and into data mode.

DCE responds. Now in data mode, still off-hook and connected to incoming call.

Application instructs modem to answer data call using standard AT commands.

ATA

CONNECT

DCE responds. The call is answered, and modem continues with procedures to

establish connection.

Example # 6: Switching from speakerphone mode to TAD mode

In this example, the sequence begins at the point of the user in speakerphone mode and at some point in time

wants to put the other end in hold. The application may switch to TAD mode in hold state and play some music

wave file to the line.

Command

AT+VLS=1

Description

Applications switches modem out of speakerphone mode and into TAD mode.

DCE responds. Now in TAD mode.

AT+VTX

CONNECT

<Data>

DTE selects voice transmit mode.

DCE responds.

DTE plays music through modem to remote caller.

DTE indicates end of voice transmit data.

DCE acknowledges switch back to voice command state.

The Application may switch back to speakerphone mode by following the example to switch from TAD mode to

speakerphone mode.

Example # 7: Call screening & recording a message using TAD - IS101 <dle> shielded method.

The TAD application is loaded. The modem is initially idle, in data mode (+FCLASS=0).

Command

RING

Description

DCE reports ringing from remote station.

The modem enters voice mode.

DCE responds.

AT+FCLASS=8

AT+VGT=128

Set speaker volume to normal.

DCE responds.

AT+VSM=132,8000

DTE selects IMA ADPCM with 8.0 kHz sampling rate.

DCE responds.

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AT Voice Commands Reference (continued)

AT+VSD=128,0

DTE selects normal silence detection sensitivity, and a silence detection interval

of 0 seconds. Disable silence detection.

DCE responds.

<DLE>-R

AT+VLS=1

DCE detects another ring, and notifies DTE.

The modem answers the call.

DCE is off-hook.

The TAD next plays its greeting message, issues a beep, and records the caller's message.

Command

AT+VTX

Description

DTE selects voice transmit mode.

DCE responds.

CONNECT

<Data>

DTE plays greeting through modem to remote caller.

DTE indicates end of voice transmit data.

DCE acknowledges switch back to voice command state.

DTE annotates greeting message with a 1.2 second beep.

DCE responds.

AT+VTS=[933,0,120]

AT+VSD=128,50

DTE selects normal silence detection sensitivity and a silence detection interval

of 5 seconds. Enable silence detection.

DEC responds.

AT+VLS=5

The speaker is attached to the system, and the modem is off-hook.

DCE is off-hook.

AT+VRX

CONNECT

<Data>

DTE selects voice receive mode.

DCE agrees.

DCE delivers <DLE> shielded voice message to DTE.

The caller leaves a message, and hangs up. The modem detects silence for a specified period of time, and then

notifies the DTE that the message being recorded has ended.

Command

Description

<DLE>-s

DCE issues presumed end of message after silence detection interval has

elapsed.

<DLE>-!

DTE signals end of voice receive state.

DCE ends voice transmission to DTR, with this code, and returns back to voice

command state.

ATH

DTE issues standard command to terminate call. Speakerphone goes on-hook,

speaker and microphone are detached from system, and modem returns to data

mode (+FCLASS=0).

DCE responds.

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AT Command Set

AT Voice Commands Reference (continued)

Example # 8: Call screening & recording a message with TAD—using the wave driver to transmit and

receive voice samples

The TAD application is loaded. The modem is initially idle, in data mode (+FCLASS=0).

Command

RING

Description

DCE reports ringing from remote station.

The modem enters voice mode.

DCE responds.

AT+FCLASS=8

AT+VGT=128

Set speaker volume to normal.

DCE responds.

AT+VSD=128,0

DTE selects normal silence detection sensitivity, and a silence detection interval

of 0 seconds. Disable silence detection.

DCE responds.

AT+VSM=129,8000

DTE selects 16-bit linear voice compression with 8.0 kHz sampling rate.

DCE responds.

<DLE>-R

AT+VLS=1

DCE detects another ring, and notifies DTE.

The modem answers call.

DCE is off-hook

The TAD next plays its greeting message, issues a beep, and records the caller's message.

The Application may transmit voice samples using the wave driver. The application may issue

WAVE_OUT_OPEN and WAVE_OUT_WRITE messages to the wave driver.

At the end of the greeting message the application may issue the WAVE_OUT_STOP message to the wave

driver.

AT+VTS=[933,0,120]

DTE annotates greeting message with a 1.2 second beep.

DCE responds.

The Application may receive voice samples using the wave driver. The application may issue

WAVE_IN_OPEN and WAVE_IN_START messages to the wave driver.

AT+VSD=128,50

DTE selects normal silence detection sensitivity and a silence detection interval

5 seconds. Enable silence detection.

DCE responds.

AT+VLS=5

Speaker is attached to system, and modem is off-hook.

DCE is off-hook

The caller leaves a message, and hangs up. The modem detects silence for a specified period of time,

and then notifies the DTE.

<DLE>-s

DCE issues presumed end of message after silence detection interval has

elapsed.

At the end of the message the application may issue the WAVE_IN_STOP message to the wave driver.

ATH

DTE issues standard command to terminate call. DCE goes on-hook,

speaker and microphone are detached from system, and modem returns to

data mode (+FCLASS=0).

DCE response.

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AT DSVD Commands

In order to use the DSVD without a local phone, a ring 3 application can be used to simulate the local phone. In

the absence of such an application, the voice connection needs to be auto enabled. This is accomplished by the

following DSVD custom AT commands:

Command

AT-SSE-OF

AT-SSE-ON

AT-SSE-AC

Description

Simulates virtual offhook event.

Simulates virtual onhook event.

Enables auto call whereby the voice channel is established as soon as the connection

is made with the DSVD modem. There is a single request for each new call.

**Both sides can be programmed in this mode and the voice channel will be activated

by one of the modems. The voice channel will stay enabled until the line is dropped.

AT-SSE-AA

AT-SSE-AM

Enables Auto Answer mode allowing the modem to always accept and answer the

voice channel request.

Enables Auto Multiple Call mode allowing a new connection every 30 seconds with a

5 second delay between calls.

AT-SSE- A -

AT-SSE-&W

AT-SSE-&R

AT-SSE-SN

AT-SSE-SF

AT-SSE-FN

AT-SSE-FF

Cancels Auto mode

Writes system audio parameters into the VoiceEeprom registry.

Reads the current registry parameters from the VoiceEeprom registry.

Sets silence detection as default mode

Disables silence detection for the modem

Sets full duplex mode (with headset) as default

Disables full duplex mode (with speakerphone), reverting to half duplex mode as

default

AT-SSE+VGT= Sets speakerphone gain level

= ?

Displays range available

Displays current setting

AT-SSE+VGR= Sets microphone gain level

= ?

Displays range available

Displays current setting

Standard AT Commands

AT-SSE=

= 0 Disables DSVD

= 1 Enables DSVD

=? Displays range available

? Displays current setting

ATD

Initiates transition from voice to DSVD

Hang up modem

ATH

AT+VNH=

Used in conjunction with ATH command for hook control:

= 0 the DCE will hang up the line when it does not detect a carrier

= 2 the DCE will remain offhook when it detects no carrier to allow the DTE to switch

the DCE to another mode

AT+VIT=

= x to set the inactivity timer

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Data Addendum

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V.25ter AT Commands

The +GMx commands are required by the Microsoft PC98 specifications.

Manufacturer Identification (+GMI?)

Read Syntax: AT+GMI?

Result:

Lucent Data/Fax

Lucent Data/Fax/Voice/VoiceView (depending on product)

Version / Revision Information (+GMR?)

Read Syntax: AT+GMR?

Result:

Lucent driver version number (e.g. 1.5.05)

Modem Identification (+GMM?)

Read Syntax: AT+GMM?

Result:

H.324 video-ready rev. 1.0

The chip set supports the following functionalities of the V.25ter for a H.324 call.

✟ The modified function of the ATD command when issued while the analog voice connection is established. This

command will not cause the DTMF dialing and tone detection associated with the usual ATD # command.

✟ The following AT commands, sub-parameters and values are supported

Table 8. V.25ter AT Commands

Command

Sub-

Values

Description

parameter

AT+A8E=<v8o>,

Defined for two conditions: as a

parameter to configure

v8o

1 The default value disables the CI option

while in V.8 origination negotiation.

V.8originating and answering

operation while the DCE is on-

hook. It initiates an action if the

DCE is off-hook. If enabled, V.8

negotiation does not preclude

simultaneous implementation of

other negotiation means like

V.8bis, V.18, V.32bis.

However, the modem, when initiating the

call as a data call, detects ANSam and is

capable of starting in V.34 mode).

6 Enables DCE control of V.8 and CI

option.

v8a

1 The default value disables the CI option

while in V.8 negotiation. However, the

modem, when answering a call, sends the

ANSam and is capable of starting in V.34

mode)

5 Enables DCE control of V.8 and CI

option.

v8cf

21h Call function for H.324 calls

c1h Call function for DSVD calls

AT+A8E?

Report current values of sub-

parameters

AT+A8E=?

Report supported ranges of values

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V.25ter AT Commands (continued)

+A8I:<v8cf><CR>

This indication is used by an

answering DCE, if +A8E,<v8a> !=0,

to indicate detection of a V.8 CI

signal, and report the recovered

Call Function octet(s). Value

<v8cf> is a hexadecimal code octet

that can take values as shown

above in +A8E command.

+A8M=<hexadecimal

coded CM or JM octet

string>

Coded CM

or JM octet

Refer to V.8 document for coding.

Directs the DCE to send a V.8 CM

or JM signal using the specified

hexadecimal coded string.

+A8A:<type><CR>

<type>

This indication is used by a calling

DCE, if +A8E <v8o> #0, to indicate

detection of an answering signal.

1 Indicates V.8 ANSam signal

flags

0 Indicated no ANSam signal detected

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V.80 AT Commands

The chip set supports the Synchronous Access Mode and most of the commands specified in V.80 standards.

The commands are either AT commands issued in the command mode, or in-band commands transmitted in the

data stream. These in-band commands are delimited by the hexadecimal characters EM (or numerically, 19h.)

A) Synchronous Access Mode AT commands

Table 9. V.80 AT Commands

Command

Sub-

parameters

Values

Initiate

Synchronous Access Mode

when the data state is

entered.

Description

+ES=[<orig_rqst>[,,<ans_fbk

>]]

Orig_rqst

Control the manner of

operation of the V.42 protocol

in the DCE

ans_fbk

Initiate

Synchronous Access Mode

when connection is

completed and Data State

is entered.

Read Syntax command to

query the current values of the

+ES sub-parameters. The

DCE shall transmit a string of

information text to the DTE

consisting of

+ES?

+ES:<orig_rqst>, ,<ans_fbk>.

Test Syntax command to

obtain all defined values of the

+ES sub-parameters. The

DCE shall transmit a string of

information text to the DTE

consisting of

+ES=?

+ES:( list of supported

<orig_rqst> values), ,(list of

supported <ans_fbk> values).

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V.80 AT Commands (continued)

Table 10. V.80 AT Commands (continued)

Command

Sub-

Values

Description

parameters

trans_idle

+ESA=[<trans_idle>[,<framed

_idle>[,,,<crc_type>[,<nrzi_en

>]]]]

In transparent sub-

mode, DCE transmits

marks (ones) on idle.

framed_idle

In Framed sub-

mode, DCE transmits

HDLC flags on idle.

In Framed sub-

mode, DCE transmits

marks (ones) on idle.

crc_type

Disable CRC

generation and checking

In Framed sub-

mode, the 16 bit CRC

specified in V.42 is

generated by the DCE in

the transmit direction and

checked by the DCE in the

receive direction.

nrzi_en

Disable NZRI

encoding and decoding.

Read Syntax command to

query the current values of the

+ESA sub-parameters

+ESA?

Test Syntax command to

obtain all supported values of

the +ESA sub-parameters

+ESA=?

<off>

<on>

Determines the threshold,

in octets, above which the

DCE shall generate a flow

off signal.

Transmit Flow Control

+ITF= [<off>[, <on>]]

Thresholds. This command

allows the DTE to determine

the input buffer size in the

DCE for data on circuit 103

from the DTE, to control the

thresholds used for flow

control of such data.

Determines the threshold,

in octets, below which the

DCE shall generate a flow

on signal.

The DCE shall transmit a

string of information to the

DTE consisting of : ITF: (list of

supported <off> values>),(list

of supported <on> values.

+ITF=?

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Version 1.0

Host-Based Controller Modem

AT Command Set

Data Addendum

June 15, 1998

AT Commands for Homologation Testing and Debugging

This section lists the homologation testing and debugging commands and homologation parameter values for

different countries.

Table 11. The Homologation Testing and Debugging Commands

Name

Description

Value

Comments

%Txx Test Commands

AT%T<val>.

Data voice relay on

Data voice relay off

Caller-ID relay on

Caller-ID relay off

Audio codec on

Audio codec off

Shunt relay on

Shunt relay off

ac off-hook relay on

ac off-hook relay off

Loop limit on

Loop limit off

Loop VI on

Loop VI off

Ring impedance on

Ring impedance off

—

Write to EEPROM

AT%T19, <loc>, <val> (<loc> and <val>

are in hex)

Read from EEPROM

Modify homologation parameter

AT%T20, <loc> (<loc> is in hex).

AT%T21, <param#>, <param_value>

(<param#> and <param_value> are in

hex as defined in the parameters table).

AT%T22, <param#> (<param#> is in hex

as defined in the parameters table).

—

Read homologation parameter

Generate DTMF 0 - 9

23 32

35 38

Generate DTMF *

Generate DTMF #

Generate DTMF A - D

—

V.25 answer tone (2100Hz)

V.25 data calling tone (1300Hz)

FAX calling tone (1100Hz)

—

1800Hz guard tone

—

V.21 channel 1 mark symbol originate

V.21 channel 1 mark symbol answer

V.21 channel 1 space symbol originate

V.21 channel 1 space symbol answer

V.23 originate channel mark symbol

V.23 answer channel mark symbol

V.23 originate channel space symbol

V.23 answer channel space symbol

Set S37 = 3, ATB0

Set S37 = 2

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Data Addendum

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AT Commands for Homologation Testing and Debugging (continued)

Table 11. The Homologation Testing and Debugging Commands (continued)

Name

Description

Value

Comments

%Txx V.22 1200 originate signaling

V.22 1200 answer signaling

Set S37 = 5

Set S37 = 6

Set S37 = 7

Set S37 = 8

Set S37 = 9

Set S37 = 10

Set S37 = 11

Set S37 = 12

Set S37 = 13

Set S37 = 3

V.22bis/V.34 2400 originate signaling*

V.22bis/V.34 2400 answer signaling*

V.32/V.34 4800 originate signaling*

V.32/V.34 4800 answer signaling*

V.32/V.34 7200 originate signaling*

V.32/V.34 7200 answer signaling*

V.32bis/V.34 9600 originate signaling*

V.32bis/V.34 9600 answer signaling*

V.32bis/V.34 12000 originate signaling*

V.32bis/V.34 12000 answer signaling*

V.32bis /V.3414400 originate signaling*

V.32bis/V.34 14400 answer signaling*

V.32ter/V.34 16800 originate signaling*

V.32ter/V.34 16800 answer signaling*

V.32ter/V.34 19200 originate signaling*

V.32ter/V.34 19200 answer signaling*

V.21 Channel 2 mark symbol

V.21 Channel 2 space symbol

V.27 2400 signaling

—

V.27 4800 signaling

V.29 7200 signaling

V.29 9600 signaling

V.17 12000 signaling

V.17 14400 signaling

Off-Hook

This puts the modem in off-hook state.

Set S37 = 14

V.34 21600 originate signaling

V.34 21600 answer signaling

V.34 24000 originate signaling

V.34 24000 answer signaling

V.34 26400 originate signaling

V.34 26400 answer signaling

V.34 28800 originate signaling

V.34 28800 answer signaling

V.34bis 31200 originate signaling

V.34bis 31200 answer signaling

V.34bis 33600 originate signaling

V.34bis 33600 answer signaling

Set S37 = 14

Set S37 = 15

Set S37 = 16

Set S37 = 17

Set S37 = 18

Set S37 = 19

•

The default is V.34 with register S28 = 1. To disable, set S28 = 0.

The following example shows how to use the V.22bis 2400 originate signaling homologation test command:

S28 = 0

S37 = 6

AT%T90

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Host-Based Controller Modem

AT Command Set

AT Commands for Homologation Testing and Debugging (continued)

Configuring for Different Countries

To configure for a specific country, execute the following AT commands:

AT%T19,0,country_code in HEX (refer to Table 2)

Verify with the ATI9 command (which displays the country name) that the right country has been configured.

Table 12. The Country Codes

Country

Country_Code in HEX

USA

Australia

Belgium

Denmark

Finland

France

Germany

The Netherlands

Italy

New Zealand

Norway

Spain

Sweden

Switzerland

United Kingdom

Austria

Japan

People’s Republic of China

Korea

Malaysia

Singapore

Taiwan

Thailand

Indonesia

Portugal

Ireland

Hong Kong

Canada

Mexico

India

Vietnam

Philippines

Greece

Hungary

Turkey

South Africa

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Data Addendum

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AT Commands for Homologation Testing and Debugging (continued)

Modifying Homologation Parameters

Once the modem is configured for a country, the homologation parameters shown in Table 3 can be temporarily

altered for that country with the following AT command

AT%T21,par#,param_value

where par# and param_value should be entered in HEX. For example, AT%T21,7,28 sets the call progress

threshold to -40 dB. AT%T22,par# displays the current value of the parameter in HEX. The par# parameter

descriptions are shown in Table 3. The country specific default values (param_value) are shown in Table 4.

Note: If a parameter is changed with the AT%T21 command, the ATZ and AT&F commands do not reset the

homologation parameters to the default values (i.e., the changes made are not reset until the power is turned off).

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AT Command Set

AT Commands for Homologation Testing and Debugging (continued)

Homologation Parameters

Table 13. The Homologation Parameters

Par #

Parameter Description

Pulse dial make time

Range

Reference

0—255

ATD

Pulse dial break time

Pulse dial digit pattern

1 = normal, 2 = Sweden,

3 = Norway

DTMF high tone level in dB with implied minus sign

Min. DTMF dial speed in ms

0—255

ATD

S11

0—255

Max. DTMF dial speed in ms

Call progress detection threshold in dB with implied minus 0—255

sign

Dial tone delay, i.e., waiting time before dial tone

detection begins in multiples of 10 ms

Dial tone hole time in ms

0—255

Delay before resetting ring count to 0, in multiples of 100

Min. ring count for auto-answer

0—255

Max. ring count for auto-answer

Min. ring signal period =

1000/(0.833 x Max. ring frequency)

Max. ring signal period =

0—255

1000/(0.833 x Min. ring frequency)

Min. ring cadence on time, in multiples of 10 ms

0—255

Min ring cadence off time, in multiple of 20 ms

Min. busy cadence on time, in multiples of 10 ms

0—255; If 0, use the standard

busy detection algorithm;

otherwise, use the country

specific values for cadence

0—255; If 0, use the standard

busy detection algorithm;

otherwise, use the country

specific values for cadence

0—255

Max. busy cadence on time, in multiples of 10 ms

Number of busy cycles required to detect busy condition

Min. busy cadence off time, in multiples of 10 ms

0—255; If 0, use the standard

busy detection algorithm;

otherwise, use the country

specific values for cadence

0—255; If 0, use the standard

busy detection algorithm;

otherwise, use the country

specific values for cadence

0 = disabled, 1 = enabled

Max. busy cadence off time, in multiples of 10 ms

Continuous # unavailable detection flag

Answer tone validation time in multiples of 10 ms

Blacklisting/delayed flag

0—255

0 = disabled, 1 = enabled

ATD

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Data Addendum

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AT Commands for Homologation Testing and Debugging (continued)

Table 13. The Homologation Parameters (continued)

Par #

Parameter Description

Range

Reference

Number of failed attempts allowed before

blacklisting

0—255

ATD

Troubled call delay in minutes

Ineffective call delay in minutes

Erroneous call delay in minutes

0—255

ATD

Blacklisting duration in multiple of 10 minutes 0—255;

0 = only delayed and no blacklisting

255 = no limit (i.e., till power turned off)

0—255, 0 = current sense disabled.

Over-current sense validation time in

multiples of 10 ms

Calling tone flag

ATA, ATD

ATD , S35

0 = disabled

1 = enabled, and disable with ^ dial

modifier permitted

2 = enabled, and disable with ^ dial

modifier not permitted

0 = not permitted

1 = permitted

Blind dial flag

ATD , ATX

2 = permitted with speaker on

0 = not permitted

1 = permitted

0 = not present & adjustable

1 = 550 Hz, 2 = 1800 Hz

0 = not permitted

1 = permitted

0 = no restrictions

1 = restricted by S7 duration

2 = not allowed

Busy detect disable (with ATX) flag

Guard tone type

ATD , ATX

S37

Bell modes permitted flag

Off-hook (ATH1) restrictions

ATB

ATH1

Shunt relay on time during off-hook in

multiples of 10 ms.

Hook flash time in multiples of 10 ms

0—255

0 = shunt relay disabled

0—255

ATD

0 = hook flash not allowed

0—65

Min. blind dial pause in seconds

Max. blind dial pause in seconds

Min. no answer time-out in seconds

Max. no answer time-out in seconds

Min. dial pause time in seconds

Max. dial pause time in seconds

S10

0—65

Min. no carrier disconnect time in multiples of 1—65

100 ms

Max. no carrier disconnect time in multiples of 1—255

100 ms

S10

Transmit level in dB with implied minus sign

Dial modifier validation

0—255

ATD

—

0 = if an invalid dial modifier is found, treat the

entire dial string as null (no digits dialed)

1 = ignore invalid dial modifiers

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AT Command Set

AT Commands for Homologation Testing and Debugging (continued)

Table 13. The Homologation Parameters (continued)

Par #

Parameter Description

TAD receive gain

Range

Reference

0—255

—

Half/full wave ring detection

0 = halfwave, 1 = fullwave

0—255

Number of failed attempts allowed in first stage

delayed dialing

ATD

Number of all failed attempts ( to any number)

allowed before any further dial attempts are blocked

Erroneous call increment count

0—255

ATD

255 = not applicable

0—255

ATD

—

Dial tone validation time in multiples of 100 ms

Busy tone detection during dial tone detection flag

DTMF high and low tone level difference in dB

Local phone detection in speakerphone

Pulse dialing flag

0—255

0 = not required, 1 = required

0—255

0 = enabled; 1 = disabled

—

ATD

—

Dial tone/call progress filter index

0 = 340—560 Hz

2 = 363—502 Hz

4 = 415—460 Hz

0—255

1 = 310—485 Hz

3 = 276—504 Hz

5 = 310—640 Hz

Dial tone detection threshold in dB

ABCD dialing permitted flag

—

0 = permitted, 1 = not permitted

ATD

Comma pause duration limit in seconds. (If there are 0—255

multiple commas between digits, the total pause

duration is limited to the duration set by this

parameter).

TAD transmit level in dB

0—255

—

Data/FAX carrier receive threshold in dB. There is a 6 0—255

dB offset in DSP. This parameter value should set to:

(required threshold [6 dB] DAA gain)

No dialtone time-out duration while detecting dialtone 0—255

with W dial modifier, in seconds

ATD

FAX/Data answer tone detection threshold in dB

Dialtone level (absolute value)

0—255

—

FAX receive threshold in dB

—

Pulse and tone dial in same dial string permitted flag 0 = permitted, 1 = not permitted

ATD

Ringer impedance relay flag

DC loop V/I characteristics relay flag

DC loop limiting relay flag

0 = off, 1 = on

Real/complex impedance

0x0X = real, Tx & Rx gains set by mercury

internal components. X = Don’t care

0x10 = real, Tx gain set by mercury

internal components & Rx gain set by

external components.

0x12 = complex, Tx gain set by mercury

internal components & Rx gain set by

external components. Mercury internal

switch used to select complex impedance.

This parameter is relevant only when a Mercury

line codec is used.

Mercury register CIOCA MSB value—receive gain

—

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Data Addendum

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AT Commands for Homologation Testing and Debugging (continued)

Par #

Parameter Description

Mercury register CIOCA LSB value—hybrid,

impedance, etc.

Range

Reference

This parameter is relevant only when a Mercury

line codec is used.

—

Mercury register CIOCB MSB value—transmit gain

This parameter is relevant only when a Mercury

line codec is used.

Mercury register CIOCB LSB value—BOM control

This parameter is relevant only when a Mercury

line codec is used.

TAD Mercury register CIOCB MSB value—transmit

gain in TAD mode

This parameter is relevant only when a Mercury

line codec is used.

FDSP Mercury register CIOCB MSB value—transmit This parameter is relevant only when a Mercury

gain in speakerphone mode line codec is used.

Lucent Technologies Inc.

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Host-Based Controller Modem

AT Command Set

AT Commands for Homologation Testing and Debugging (continued)

Country Specific Homologation Parameters

Country specific values for the homologation parameters are shown in Table 14.

Note: The values listed in Table 14 are typical values and change based on OEM preferences.

Table 14. The Country Specific Homologation Parameters

Par. #

Australia

Belgium

Denmark

Finland

France

Germany

150

255

100

255

120

255

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Data Addendum

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AT Commands for Homologation Testing and Debugging (continued)

Table 15. The Country Specific Homologation Parameters (continued)

Par. #

Australia

Belgium

Denmark

Finland

France

Germany

255

0x00

0x88

0x80

0x6b

0x12

0x00

0x06

0x6b

0x10

0x00

0x0c

0x6b

0x10

0x00

0x0c

0xaa

0x10

0x00

0x0c

0x6b

0x10

0x00

0x0c

0x6b

Version 1.0

0x12

0x00

0x06

0x6b

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Host-Based Controller Modem

AT Command Set

AT Commands for Homologation Testing and Debugging (continued)

Par. #

Australia

0x17

Belgium

0x1e

Denmark

0x1e

Finland

0x1e

France

0x1e

Germany

0x17

0x1e

0x13

0xcd

0x13

0xcd

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Data Addendum

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AT Commands for Homologation Testing and Debugging (continued)

Table 15. The Country Specific Homologation Parameters (continued)

Par. # Netherlands

Italy

New Zeal.

Norway

Spain

Sweden

Switzerland

100

120

100

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AT Command Set

AT Commands for Homologation Testing and Debugging (continued)

Table 15. The Country Specific Homologation Parameters (continued)

Par. # Netherlands

Italy

New Zeal.

Norway

Spain

Sweden

Switzerland

255

0x10

0x12

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AT Commands for Homologation Testing and Debugging (continued)

Par. # Netherlands

Italy

0x00

0x0c

0x6b

0x1e

0x13

0xcd

New Zeal.

0x00

Norway

0x00

0x0c

Spain

0x00

0x0c

0x6b

0x1e

0x13

0xcd

Sweden

Switzerland

0x00

0x0c

0x6b

0x1e

0x13

0xcd

0x00

0x0c

0x6b

0x16

0x13

0xcd

0x0c

0x06

0x6b

0x1e

0x13

0xcd

0x6b

0x16

0x17

0x13

0xcd

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AT Command Set

AT Commands for Homologation Testing and Debugging (continued)

Table 15. The Country Specific Homologation Parameters (continued)

Par. #

Austria

Japan

China

Korea

Malaysia

Singapore

150

100

250

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Data Addendum

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AT Commands for Homologation Testing and Debugging (continued)

Table 15. The Country Specific Homologation Parameters (continued)

Par. #

Austria

Japan

China

Korea

Malaysia

Singapore

255

0x12

0x00

0x06

0x10

0x00

0x0c

0x00

0x88

0x80

0x10

0x00

0x0c

0x10

0x00

0x0c

0x10

0x00

0x0c

0x10

0x00

0x0c

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AT Commands for Homologation Testing and Debugging (continued)

Par. #

Austria

0x6b

Japan

0x6b

0x1e

0x13

0xcd

China

0x6b

0x1e

0x13

0xcd

Korea

0x6b

0x1e

0x13

0xcd

Malaysia

0x6b

Singapore

0x6b

0x17

0x13

0xcd

0x1e

0x13

0xcd

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Data Addendum

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AT Commands for Homologation Testing and Debugging (continued)

Table 15. The Country Specific Homologation Parameters (continued)

Par. #

Taiwan

Thailand

Indonesia

Ireland

Portugal

Hong Kong

150

250

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AT Command Set

AT Commands for Homologation Testing and Debugging (continued)

Table 15. The Country Specific Homologation Parameters (continued)

Par. #

Taiwan

Thailand

Indonesia

Ireland

Portugal

Hong Kong

255

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AT Commands for Homologation Testing and Debugging (continued)

Par. #

Taiwan

0x10

Thailand

0x10

Indonesia

Ireland

0x12

Portugal

0x10

Hong Kong

0x10

0x00

0x0c

0x6b

0x1e

0x13

0xcd

0x00

0x0c

0x6b

0x1e

0x13

0xcd

0x00

0x0c

0x6b

0x1e

0x13

0xcd

0x00

0x0c

0x6b

0x1e

0x13

0xcd

0x00

0x06

0x6b

0x17

0x13

0xcd

0x00

0x0c

0x6b

0x1e

0x13

0xcd

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AT Command Set

AT Commands for Homologation Testing and Debugging (continued)

Table 15. The Country Specific Homologation Parameters (continued)

Canada

Mexico

India

Vietnam

Philippines

Par. #

150

255

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Data Addendum

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AT Commands for Homologation Testing and Debugging (continued)

Table 15. The Country Specific Homologation Parameters (continued)

Par. #

Canada

Mexico

India

Vietnam

Philippines

255

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AT Commands for Homologation Testing and Debugging (continued)

Par. #

Canada

Mexico

0x10

India

0x10

Vietnam

0x10

Philippines

0x10

0x88

0x80

0x6b

0x1e

0x13

0xcd

0x00

0x0c

0x6b

0x1e

0x13

0xcd

0x00

0x0c

0x6b

0x1e

0x13

0xcd

0x00

0x0c

0x6b

0x1e

0x13

0xcd

0x00

0x0c

0x6b

0x1e

0x13

0xcd

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AT Commands for Homologation Testing and Debugging (continued)

Country Specific S Register Defaults

Note: The values listed in Table 15 are typical values and change based on OEM preferences.

Table 156. Country Specific Defaults for S Registers

S Reg.

Australia

Belgium

Denmark

Finland

France

Germany

000

004

050

002

020

095

000

001

000

004

050

004

020

090*

000

001

000

004

050

002

020

090*

000

001*

000

004

050

004

002

090*

000

001*

000

002

140

002

090*

000

001

000

004

050

004

020

090*

000

001

s10

s11

s30

s35

* Changing this value with the ATS command is not permitted.

Table 16. Country Specific Defaults for S Registers (continued)

S Reg. Netherlands

Italy

New Zeal.

Norway

Spain

Sweden

000

005

050

002

020

090*

000

001*

000

004

050

002

020

090*

000

001

000

004

050

004

015

090

000

001

000

004

050

004

009

090*

000

001*

000

004

050

005

020

090*

000

001*

000

004

050

004

020

090*

000

001*

s10

s11

s30

s35

* Changing this value with the ATS command is not permitted.

Table 16. Country Specific Defaults for S Registers (continued)

S Reg.

Switzerland

Austria

Japan

China

Korea

000

004

050

004

020

090*

000

001

000

004

050

004

020

090

000

001

000

004

050

004

020

090*

000

001*

000

004

050

002

020

095

000

002

050

002

020

095

000

001

000

004

045

002

020

095

000

001

s10

s11

s30

s35

* Changing this value with the ATS command is not permitted.

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AT Commands for Homologation Testing and Debugging (continued)

Table 16. Country Specific Defaults for S Registers (continued)

S Reg.

Malaysia

Singapore

Taiwan

Thailand

Indonesia

Portugal

000

003

035

002

020

095

000

003

035

002

020

095

000

003

050

002

020

095

000

001

000

002

050

002

020

095

000

002

050

002

020

095

000

001

000

004

050

002

090*

004

001

s10

s11

s30

s35

* Changing this value with the ATS command is not permitted.

Table 16. Country Specific Defaults for S Registers (continued)

S Reg.

Ireland

Hong Kong

Mexico

India

Vietnam

Philippines

000

002

050

002

020

095

000

004

039

004

020

090

000

001

000

002

050

002

020

095

000

001

000

002

050

002

020

095

000

002

050

002

020

095

000

002

050

002

020

095

000

002

050

002

020

095

000

s10

s11

s30

s35

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AT Commands for Homologation Testing and Debugging (continued)

Changing the DTMF Dial Speed Default Value

To change the DTMF dial speed default value, follow these steps:

1. Set par# 5 (Min DTMF dial speed) and par# 6 (Max DTMF dial speed) to the required DTMF dial speed with

the AT%T21 command.

2. Issue an ATZ command.

3. Issue an ATS11? command to display the new value. The following example shows how to set the current

default value from 80 to 85:

ATS11?

080

AT%T21,5,55

AT%T21,6,55

ATZ

ATS11?

085

If you do not want to change both par#5 and par#6, set par#5 to the new default DTMF duration if you are

increasing the default value from the current value; otherwise, set par#6 to the new default DTMF duration.

The following two example show how to set one parameter:

1. This example shows how to set the current default value of S11 from 80 to 85:

ATS11?

080

AT%T21,5,55

ATZ

ATS11?

085

2. This example shows how to set the current default value of S11 from 85 to 80:

ATS11?

085

AT%T21,6,50

ATZ

ATS11?

080

Lucent Technologies Inc.

Version 1.0

For additional information, contact your Microelectronics Group Account Manager or the following:

INTERNET: http://www.lucent.com/micro

U.S.A.:

ASIA PACIFIC:

JAPAN:

Microelectronics Group, Lucent Technologies Inc., 555 Union Boulevard, Room 30L-15P-BA, Allentown, PA 18103

1-800-372-2447, FAX 610-712-4106 (In CANADA: 1-800-553-2448, FAX 610-712-4106), e-mail [email protected]

Microelectronics Group, Lucent Technologies Singapore Pte. Ltd., 77 Science Park Drive, #03-18 Cintech III, Singapore 118256

Tel. (65) 778 8833, FAX (65) 777 7495

Microelectronics Group, Lucent Technologies Japan Ltd., 7-18, Higashi-Gotanda 2-chome, Shinagawa-ku,Tokyo 141, Japan,

Tel. (81) 3 5421 1600, FAX (81) 3 5421 1700

For data requests in Europe:

MICROELECTRONICS GROUP DATALINE: Tel. (44) 1734 324 299, FAX (44) 1734 328 148

For technical inquiries in Europe:

CENTRAL EUROPE: (49) 89 95086 0 (Munich), NORTHERN EUROPE: (44) 1344 865 900 (Bracknell UK),

FRANCE: (33) 1 47 67 47 67 (Paris), SOUTHERN EUROPE: (39) 2 6601 1800 (Milan) or (34) 1 807 1700 (Madrid)

For Technical inquires in Taiwan:

Microelectronics, Lucent Technologies Taiwan Modem Design Center (886) 2-547-7016

ucent Technologies Inc. reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or application. No

ghts under any patent accompany the sale of any such product(s) or information.

Printed in U.S.A.

June 1998

XX-XXXDMOD

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