MultiModemDID User GuideChapter 4 - AT Commands, S-Registers, Result Codes

AT Commands

Command:

AT

Attention Code

Values:

 

n/a

Description:

 

The attention code precedes all command lines except A/ and

 

 

the escape sequence.

Command:

ENTER Key

Values:

 

n/a

Description:

 

Press the ENTER or RETURN key to execute most commands.

Command:

A

Answer

Values:

 

n/a

Description:

 

Answers an incoming call before the final ring.

Command:

A/

Repeat Last Command

Values:

 

n/a

Description:

 

Repeats the last command string. Do not precede this

 

 

command with AT. Do not press ENTER to execute.

Command:

Bn

Communication Standard Setting

Values:

 

n = 0–3, 15, 16

Default:

 

1 and 16

Description:

B0

Select ITU-T V.22 mode when modem is at 1200 bps.

 

B1

Select Bell 212A when modem is at 1200 bps.

 

B2

Deselect V.23 reverse channel (same as B3).

 

B3

Deselect V.23 reverse channel (same as B2).

 

B15

Select V.21 when the modem is at 300 bps.

 

B16

Select Bell 103J when the modem is at 300 bps.

Command:

Ds

Dial

Values:

 

s = dial string (phone number and dial modifiers)

Default:

 

none

Description:

 

Dial telephone number s, where s may up to 40 characters long

 

 

and include the 09, *, #, A, B, C, and D characters, and the L,

P, T, W, S, comma (,), semicolon (;), !, @, ^ and $ dial string modifiers.

Dial string modifiers:

LRedial last number. (Must be placed immediately after ATD.) P Select pulse-dialing until a T is encountered. Affects current

and subsequent dialing.

T Select tone-dialing until a P is encountered. Affects current and subsequent dialing.

W Wait for a new dial tone before continuing to dial. (X2, X4, X5, X6, or X7 must be selected.)

, Pause during dialing for time set in register S8.

; Return to command mode after dialing. Place at end of dial string.

! Hook flash. Causes the modem to go on-hook for one-half second, then off-hook again.

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Multi-Tech Systems MT5634ZBA-DID manual AT Commands, Answer, Repeat Last Command, Communication Standard Setting, Dial