AT-Command Set

AT A

ANSWER. Accepts an incoming call that has been indicated by a "RING". If the S0 register is set to zero, TTY indicates a RING until the call is answered by the AT A command or released.

AT D[T|P]<number>

DIAL. Dials the given number. Dial tone (T) or dial pulse (P) are ignored. <number> can have the following format: <CalledPartyNumber>[| <Subaddress>][^56k][+i<y> | +p=btx] where <y> is the Diva-specific +I command (see below).

AT E[0|1]

<n>

Echo mode. In echo mode, the commands sent to the modem are echoed back to the terminal.

0

Echo mode OFF. In command mode, the modem does not reflect the data that it has received from the application back to the application.

1

Echo mode ON. In command mode, the modem reflects the data that it has received from the application back to the application.

AT I[<n>]

INFO. Returns the modem identification string. <n> : integer ranging from 0 to 9

AT H[0]

HANGUP. Disconnects the line.

AT O[1]

ONLINE. Switches the modem from command mode to data mode.

AT Q[<n>]

<n>

Modem response mode

0

Returns result codes (default)

1

Quiet mode. In quiet mode the modem driver does not return result codes for the commands.

AT V[<n>]

<n>

Modem response (result code) format

0

Numeric result codes.

1

Plain text result codes (verbal mode, default).

AT L<n>

Command accepted for compatibility reasons.

AT N<n>

Command accepted for compatibility reasons.

AT M<n>

Command accepted for compatibility reasons.

AT Y<n>

Command accepted for compatibility reasons.

AT X<n>

<n>

Result code reporting option

0

Enables minimum information only (plain CONNECT in case of successful connection establishment, NO CARRIER in case of dialing/answer error).

4

Enables full information (the result codes are reported, default).

AT Z[<n>]

Soft reset. Drops the connection if the modem is in ESCAPE mode. Resets the modem and restores the selected predefined modem configuration profile <n>. See Supported TTY Profiles on page 63 for more information. See AT&F below for the list of predefined modem configuration profiles.

AT S<r>=?

Displays the value of the selected S-register <r>.

AT S0=<n>

<n>

Description

0

Disables auto answer. Incoming calls are answered with an ALERT message and indicated by RING messages (every 4 sec). The user can investigate the call parameters, select the appropriate profile or settings and accept the call by the AT A command. The user can issue the AT H command to reject the incoming call.

1 ... 254

Enables auto answer. Incoming calls are indicated by a RING and accepted automatically.

255

Ignores the incoming calls (default).

ATS2=<n>

<n>
(0 ... 255)

Description

127

Disables the escape sequence process, i.e. no escape character is recognized.

43

The default value of the ESCAPE character ("+").

ATS7=<n>

Default value is set to zero (e.g., modem will use protocol-specific default value).

Modem mode: time to wait for carrier. Sets the time in seconds that the modem will wait for a carrier before hanging up. <n> is a range from 0 to 255 seconds.

Fax mode: time to wait for connect. Sets the time in seconds that fax will wait for connection before hanging up. Suggested value is 200 seconds. Values less than 10 seconds are ignored. The carrier waiting time starts after the connection was established and is set to 60 seconds.

ATS9=<n>

Carrier Detect Response Time. Sets the time in tenths of a second that a carrier must be present before the modem considers it valid. <n> is a range from 0 to 255 tenths of a second. This register is only implemented for compatibility reasons. Writing to this register does not affect the Carrier Detect Response time.

ATS10=<n>

Delay between carrier loss and hang up. Sets the time in tenths of a second that the modem waits before hanging up after a loss of carrier. <n> is a range from 0 ... 255 tenths of a second.

ATS27=<bitmask>

Bit

Value

Result

0

1

Reserved

1

2

Reserved

2

4

Reserved

3

8

Disables 2100 Hz answer tone

4

16

Reserved

5

32

Reserved

6

64

Reserved

7

128

Reserved

ATS51=<bitmask>

Bit

Value

Result

0

1

Disables error correction for 1200 bps connections

1

2

Disables error correction for V.22bis connections

2

4

Disables error correction for V.32bis connections

3

8

Reserved

4

16

Reserved

5

32

Reserved

6

64

Reserved

7

128

Reserved

ATS91=<bitmask>

Bit

Value

Result

0

1

Use reverse SDLC establishment (SNRM sent by answerer and not by caller). Mandatory for POS.

1

2

Poll on each SDLC frame. Required by some POS terminals.

ATS92=<n>

SDLC Address A (default 0x30)

ATS128

S-register 128 is a read-only register. Reading this register allows to retrieve information on the current (last) incoming call. It returns a message in the following format: ;<calling party number>;<destination_address>. If calling party or destination sub- addresses are present, they are separated by a slash "/" from the called party number or the destination address. For example, the calling party number 800, calling party sub-address 900, destination address 400, destination sub-address 500 are presented as: ;800/900;400/500.

ATS172=<bitmask>

Bit

Value

Result

0

1

Enable transmission and reception of empty frames.

1

2

Enable "multimoding", i.e. a trailing byte (modulation tag) in every frame specifies which modulation has to be used to send this frame or at which modulation it was received. Valid modulation tags are 0x27 for V.23 HDX off hook and 0x28 for V.23 HDX on hook.

2

4

Shield empty frames. This mode enables a tty application to send and receive empty frames. Since a frame with a length of 1 byte is invalid in the V.23 SMS and V.23 Caller ID protocol, it is used to carry the information that an empty frame occurred and which modulation was detected. The data byte in a real 1 byte frame is replaced by a unique value 0xff. A single byte frame 0x27 indicates or issues an empty frame in V.23 HDX off hook. A single byte frame 0x28 indicates or issues an empty frame in V.23 HDX on hook.

ATS253=<n>

<n> (0 ... 127)

Description

Set

Write allows to set coded in accordance with Q.931 cause value to be used to disconnect this call (for example by ATH/ATZ commands or by DTR drop operation). The Diva Media Board provides conversion between used national dependent values/in band procedures and Q.931.

Read

Read after disconnect provides coded in accordance with Q.931 value of disconnect cause. The Diva Media Board provides conversion between used national dependent values/in band procedures and Q.931.

ATS254=<bitmask>

Bit

Value

Result

0

1

Allows to reject incoming call using ATH, ATZ commands or using DTR drop procedure.

1

2

Activate TIES (Time Independent Escape Sequence). The TIES procedure switches to command mode if "+++AT<CR>" (where <CR> represents hex digit 0x0D) sequence is detected in the data stream after a 20 ms pause and is followed by a 40 ms pause.

ATS1001=<number>

Second origination address. This number is placed as the second origination address.

ATS1002=<number>

Specifies the numbering plan identifier for the second origination address. Number should be in the range 0...255. If number is set to 128 or larger then octet 3a (presentation and screening indicator) is not used.

ATS1003=<number>

Specifies the presentation (bits [7:6] in octet 3a of origination address) and screening (bits [2:1] in octet 3a of origination address) for the second origination address. Number should be in the range 0...127.

AT \V[<n>]

<n>

CONNECT message format

0

Plain CONNECT message without any connection parameters.

1

Full CONNECT message including connection parameters (modulation, compression, transmit/receive rate).

2

Full CONNECT message in multi-line format: CONNECT, TX/RX, CARRIER, PROTOCOL, COMPRESSION.

AT \T[0...65535]

Inactivity timeout (s). TTY releases the connection if there was no data traffic on the interface for the time interval specified here.

AT \D[<n>]

Debug level. Reserved for use by Dialogic Corporation.

AT \N[<n>]

<n>

Error correction control

0|1

Turn off error correction, error correction detection, and data compression (i.e. connect in transparent mode only).

2

Disable V.42 error correction and V.42 error correction detection (i.e. MNP only). In case of failure, connect in transparent mode.

3

Try to establish error correction; try to detect error correction (any supported). In case of failure, connect in transparent mode.

4

Force V.42 error correction. Disconnect in case of failure.

5

Force MNP error correction. Disconnect in case of failure.

6

Force V.42 or MNP error correction. Disconnect in case of failure.

7

Try to establish V.42 error correction; try to detect V.42 error correction. In case of failure, connect in transparent mode.

8

Try to establish MNP error correction; try to detect MNP error correction. In case of failure, connect in transparent mode.

10

Force SDLC error correction. Disconnect in case of failure.

11

Try to establish SDLC error correction. In case of failure, connect in transparent mode.

12

Try to establish SDLC or MNP error correction. In case of failure, connect in transparent mode.

13

Try to establish SDLC or V.42 error correction. In case of failure, connect in transparent mode.

14

Try to establish SDLC or V.42/MNP error correction. In case of failure, connect in transparent mode.

AT %C[<n>]

<n>

Data compression control

0

Turn data compression off

1

Turn data compression on

AT #CID=?

Displays CID (Caller ID) setting. The short form of this command is "CID?".

AT #CID=<n>

<n>

Sets CID mode. The TTY indicates the origination (CID) and destination (DAD) number in the RING and/or CONNECT message. This enables a server application for example to forward incoming calls directly to their destination. [a]

0

No CID indication

1

CID indication in RING message [a]

2

CID indication in CONNECT message [b]

3

CID indication in RING and in CONNECT messages

5

CID and DAD (Destination Address [a]) indication in RING message [c]

6

CID and DAD [a] indication in CONNECT message [d]

7

CID and DAD [a] indication in RING and in CONNECT messages

9

Use an mgetty friendly format for CID indication in RING message [e]

14

HylaFax friendly format

RING
CID: XXX[/YYY]
DAD: HHH[/ZZZ]
RING

15

Use an mgetty friendly format for CID and DAD [a] indication in RING message [f]

AT &C[<n>]

Accepted for compatibility reasons. <n> : any integer

AT &G[<n>]

<n>

Guard tone options

0

Turns guard tone off (default).

1

Turns 550 Hz guard tone on.

2

Turns 1800 Hz guard tone on.

AT &D[<n>]

Data Terminal Ready (DTR) options. <n> ranges from 0 to 3. See AT&Q command below.

AT &Q[<n>]

Communication options. <n> ranges from 0 to 3. Data Terminal Ready (DTR) options and Communication (COM) options determine the behavior of the virtual modem when DTR switches from ON to OFF in accordance with the following table:

AT &K<n>

<n>

Terminal flow control options. Defines the flow control mechanism.

0

Disables flow control.

1

Enables RTS/CTS local + remote flow control (obsolete).

2

Enables XON/XOFF flow control (obsolete).

3

Enables RTS/CTS local + remote flow control.

4

Enables XON/XOFF flow control.

5

Enables transparent XON/XOFF flow control.

6

Enables both XON/XOFF and RTS/CTS flow control (voice).

AT &V

Displays the current configuration, the last number that has been dialed (last DIAL to), and the calling party number of the last incoming call (last RING from).

AT &V1

Displays current settings and settings of the available profiles.

AT &F[<n>]

Resets the modem and restores the selected predefined modem configuration profile. AT&F sets factory defaults for current profile. See Supported TTY Profiles for details.

AT #CID=?

Displays CID (Caller ID) setting. The short form of this command is "CID?".

AT #CID=<n>

<n>

Sets CID mode. The TTY indicates the origination (CID) and destination (DAD) number in the RING and/or CONNECT message. This enables a server application for example to forward incoming calls directly to their destination. [a]

0

No CID indication

1

CID indication in RING message [a]

2

CID indication in CONNECT message [b]

3

CID indication in RING and in CONNECT messages

5

CID and DAD (Destination Address [a]) indication in RING message [c]

6

CID and DAD [a] indication in CONNECT message [d]

7

CID and DAD [a] indication in RING and in CONNECT messages

9

Use an mgetty friendly format for CID indication in RING message [e]

14

HylaFax friendly format

RING
CID: XXX[/YYY]
DAD: HHH[/ZZZ]
RING

15

Use an mgetty friendly format for CID and DAD [a] indication in RING message [f]

AT +iA<number>

Accepted address. Incoming calls are only accepted if the called party number equals the phone number configured here. Addresses are compared backwards. So, if you set the accepted address to 12, the called party numbers that end with 12, e.g., 12, 812, 384012, match the configured address. [c]

AT +iO<number>

Origination address. This number is placed as the origination address. [c]

AT +iB<n>

<n>

B-channel data adaptation rate [d]

2

1200 bps

3

2400 bps

4

4800 bps

5

9600 bps

6

19200 bps

7

38400 bps

8

48000 bps

9

56000 bps

AT +iC[<n>]

<n>

Determines whether the modem stays in command mode after call setup.

0

Stays in command mode.

1

Switches to data mode.

AT +iD<n>

<n>

Delay for AT-command response (ms).

0

AT-command response is sent immediately.

1 ... 255

AT-command response is delayed.

AT +iF<n>

<n>

RNA Framing. [e]

0

No framing check (pass data transparently).

1

Force synchronous conversation (PPP).

2

Force asynchronous conversation (PPP).

3

Force synchronous conversation (RAS).

4

Force asynchronous conversation (RAS).

5

Detects required conversation by analyzing incoming data packets.

Bit

Value

RNA patches*

1

1

Reserved, should be zero.

2

2

Reserved, should be zero.

3

4

Reserved, should be zero.

4

8

Pass IPCP (default is track).

5

16

Force patch of IPCP.

6

32

Keep RX ACCM (default is add).

7

64

Keep TX ACCM (default is delete).

8

128

Pass LCP (default is track).

*Controls the behavior of the ASYNC/SYNC PPP conversion module. See ASYNC/SYNC Conversion Module for details.

AT +iL<n>

Maximum data frame length. <n> should be in the range of 0 ... 2048. 0 defaults to the maximum frame length supported by the Diva Media Board.

AT +iM<n>

<n>

Working mode

1

Normal operation mode. TTY does not try to preserve the protocol data unit boundaries (streaming). This mode fully emulates the behavior of a "classic" modem or terminal adapter connected via a serial interface.

2

Fax mode. TTY switches to this mode as soon as a Fax CLASS 1 or Fax CLASS 2 command is detected.

3

Voice mode (bit-transparent access to B-channel data).

4

RNA mode. TTY operates in framing mode, investigates protocol data units, and provides ASYNC/SYNC conversion if necessary.

5

BTX over ISDN mode.

6

Frame mode. The TTY preserves the frame boundaries of the ISDN data frames. Note that the Linux TTY interface will stream the data again.

AT +iN<Format>

Format

Number1[/Number2[/
Number3[/Number4]]]

Specifies the numbering plan identifier for the destination address (Number1), origination address (Number2), presentation indicator - bits [7:6] in octet 3a of origination address (Number3) and screening indicator - bits [2:1] in octet 3a of origination address (Number4). Number1 and Number2 should be in the range 0...127. Number3 and Number4 should be in the range 0...3.

AT +iP<n>

<n>

Specifies the protocol stack used to transfer bearer data.

1

L1 - HDLC, L2 - X.75SLP and V.42bis data compression autodetection in case of incoming connection, L3 - transparent

2

L1 - V.110 synchronous mode, L2 and L3 - transparent

3

L1 - V.110 asynchronous mode, L2 and L3 - transparent

4

L1 - analog modem (synchronous mode), L2 - V.42+V.42bis autodetect, L3 - transparent

5

L1 - analog modem with full negotiation, L2 - V.42+V.42bis autodetect, L3 - transparent

6

L1 - HDLC, L2 - V.120, L3 - TA

7

L1 - Fax, L2 - transparent, L3 - T.30 with ECM, T.6, MR, MMR, polling

8

L1, L2, and L3 - transparent

9

L1 - HDLC, L2, and L3 - transparent

10

L1 - HDLC, L2 - X.75SLP, L3 - BTX

11

external device 0

12

L1 - HDLC, L2 - X.75SLP and data compression autodetection in accordance with V.42bis, L3 - transparent

AT +iS<Format>

Format

Service Indicator/Additional Service Indicator

Number

Sets the Service Indicator to the provided value. The Additional Service Indicator is set to zero. The number should be in the range 1 ... 7.

Number1/Number2

Number 1: Service Indicator. It should be in the range of 1 ... 7. Number 2: Additional Service Indicator. It should be in the range of 0 ... 255. [f]

At +iT<n>

ISDN trace options. Reserved for use by Dialogic. <n> ranges from 0 to 255.

AT +iH[<n>]

<n>

Erases/sets slow application workarounds.

0

Erases workarounds. Equivalent to AT command: AT+IW=0+IX=0+IY=0+iZ0

1

Sets workarounds. Equivalent to AT command: AT+IW=1+IX=81+IY=8+iZ80

AT +iW<n>

Defers receive notifications to <n> bytes/millisecond. <n> should be in the range of 0 ... 64000.

AT +iX<n>

Respects read block size and defers receive notifications. <n> should be in the range of 0 ... 64000.

AT +iY<n>

Defers transmission to <n> bytes/millisecond. <n> should be in the range of 0 ... 8.

AT +iZ<n>

Splits large frames into <n> byte segments. <n> should be in the range of 0 ... 2048.

AT +iU=<BC>|<BC/LLC>

Sometimes the Service Indicator and Additional Service Indicator are not flexible enough to indicate the necessary information in bearer capabilities (BC) and low-layer compatibility (LLC) that the user wants to provide for an outgoing call. In this case, the user can set these values directly. For example, to indicate a V.110 call with 38400 bps and the appropriate flow control option, the user can enter the command: AT+IU=<8890214d00bb> to specify the BC value. The provided BC and LLC values are used without any verification (except max. length of information element) to create the SETUP message sent over the D-channel. This allows the use of proprietary BC/LLC values not yet covered by standards. See Call Parameter (BC/LLC) Selection for details.

Example: If the BC value is 8890, enter AT +iU<8890>. If the of each of the BC and the LLC is 8890, enter AT +iU<8890/8890>.

AT +iI

Reserved.

Mode

AT&F16+IE=piafs32k

AT&F17+IE=piafs64k

AT&F18+IE=piafs

AT+IE=none

AT +iQ=<binding>

String

Binding. See TTY Channel Pool Mode for details.

oX

Bind TTY to board X for outgoing calls

iX

Bind TTY to board X for incoming calls

aX

Bind TTY to board X for the calls

o0

Erase TTY binding for outgoing calls

i0

Erase TTY binding for incoming calls

a0

Erase TTY bindings for incoming and outgoing calls

?

Display current bindings

AT +iK=<binding>

String

Binding. See TTY Channel Pool Mode for details.

oY

Bind TTY to line Y for outgoing calls

iY

Bind TTY to line Y for incoming calls

aY

Bind TTY to line Y for the calls

o0

Erase TTY binding for outgoing calls

i0

Erase TTY binding for incoming calls

a0

Erase TTY bindings for incoming and outgoing calls

?

Display current bindings

Note: This command must be used in conjunction with the AT+iQ command to first set the controller number that the tty interface is bound to

AT +MF=<data bits><parity>,<top bits>

Data bits: 8,7,5. Parity: N (none), O (odd), E (even), S (space), M (mark). Stop bits: 1, 2. The transmission rate is derived from the currently selected Rx/Tx transmission speed (+MS command). Example: AT+MF=8,N,1 - select 8 data bits, no parity and one stop bit.

AT +MF?

Returns currently selected framing.

AT +MF=?

Returns list of supported parameters.

AT +MS?

Modulation Selection Query. The response to the query has the following format: AT +MS: <mod>,<auto>,<min>,<max>,<min_rx>,<max_rx>.

AT +MS=[<mod>][,[<auto>]

[,[<min>][,[<max>][,[<min_rx>]
[,[<max_rx>]]]]]]

Modulation Selection Set. Modulation: B103 (300 bps), B212A (1200 bps), V21 (300 bps), V22 (1200 bps), V22B (1200 - 2400 bps), V22F (1200 bps Diva Fast Setup), V22BF (1200 - 2400 bps Diva Fast Setup), V23C (Tx:75 bps/Rx:1200 bps outgoing call, Tx:1200 bps/Rx:75 bps incoming call), V23HDX, V23HDXON (1200 bps half duplex for SMS over PSTN, off/on hook standard), V32 (4800 - 9600 bps), V32B, (4800 - 14400 bps), V34 (2400 - 33600 bps), V90 (28000 - 56000 bps download client <- server, 28000 - 32000 bps upload client -> server), V90a (28000 - 56000 bps upload client -> server, 28000 - 32000 bps download client <- server). Auto: 0 - use only the specified modulation, 1 - try other modulations with lower data rates if the specified modulation cannot be used. min: Minimum transmit data rate. max: Maximum transmit data rate. min_rx: Minimum receive data rate. max_rx: Maximum receive data rate. Only V90 modulation has different transmit/receive rates. Rate = 0 means no minimum or maximum limitation. Valid Rate Values (in bps): 75, 300, 600, 1200, 2400, 4800, 7200, 9600, 12000, 14400, 16800, 19200, 21600, 24000, 26400, 28000, 28800, 29333, 30667, 31200, 32000, 33600, 33400, 34667, 36000, 37333, 38000, 38667, 40000, 41333, 42000, 42667, 44000, 45333, 46000, 46667, 48000, 49333, 50000, 50667, 52000, 53333, 54000, 54667, 56000, 0

AT +FCLASS?

Queries the configured modem class.

AT +FCLASS=?

Displays the supported modem classes.

AT +FCLASS=<n>

Configures the modem for modem class <n>. 0 - Data mode, 1 - EIA class 1, 2 - EIA class 2

AT +FMFR?

Returns the name of the modem manufacturer.

AT +FMDL?

Returns the name of the modem model.

AT +FREV?

Returns the product version.

AT +FLPL=<n>

Control class 2 polling capability. 0 - Normal operation. 1 - Document available for polling.

AT +FTD

For information, see AT+FTD: Set current time and date.

AT +FPH

For information, see See AT+FPH: Page header generation.

year

The current year. Range: 1970 to 65535

month

The current month number. Range: 1 to 12. January is 1.

day

The current day of the month. Range: 1 to 31.

hour

The current hour. Range: 0 to 23.

minute

The current minute. Range 0 to 59.

second

The current second. Range 0 to 59.

zone

Reserved. Should be set to zero.

dtsdelta

Reserved. Should be set to zero.

mode

Reserved. Should be set to 1.

string

The string defines the page header itself. Only ASCII printable characters are allowed in the string (0x20 thru 0x7e). Escape sequences that are introduced with the percent (%) character are allowed. The string can be partitioned into one, two, or three parts by using single quote characters (') in the command expression.

%d (or %D)

The day of the month as a decimal number (range 01 to 31).

%h (or %H)

The hour as a decimal number using a 24-hour clock (range 00 to 23).

%i (or %I)

The hour as a decimal number using a 12-hour clock (range 01 to 12).

%m

The month as a decimal number (range 01 to 12).

%M

The minute as a decimal number (two digits).

%p

Either "am" or "pm" according to the given time value or the corresponding strings.

%P

The current page number of the fax being sent, as computed by the padding. Please note that page number is printed at the right upper corner of the page and not at the location where %P tag was found.

%r (or %R)

The ID of the remote fax machine. Leading and trailing blanks are stripped. A printf-style field width specifier such as %20r or %-20r can be used to print this in a fixed width field.

%s (or %S)

The second as a decimal number (two digits).

%t (or %T)

The ID of the transmitting fax machine. Leading and trailing blanks are stripped. A printf-style field width specifier such as %20t or %-20t can be used to print this in a fixed width field.

%y

The year as a decimal number without the century.

%Y

The year as a decimal number including the century.

%C

C - unrecognized format character. Printed as C.