Multi-Tech Systems MT2834ZDX manual AT Commands, S- Registers and Result Codes

Chapter 3 – AT Commands, S-Registers, and Results Codes

Chapter 3 – AT Commands, S- Registers and Result Codes

AT Commands

This section summarizes the AT commands for this modem.

Command:	AT	Attention Code
Values:	n/a
Description:	The attention code precedes all command lines except A/, A:, and escape codes.
Command:	RETURN Key
Values:	n/a
Description:	Press the RETURN (ENTER) key to execute most commands.
Command:	A	Force Answer Mode
Values:	n/a
Description:	Answer call before final ring.
Command:	A/	Repeat Last Command
Values:	n/a
Description:	Do not precede this command with AT. Do not press RETURN to execute.
Command:	A:	Continuous Redial
Values:	n/a
Description:	Redial last number until answered (10 redials in DOC modems). Do not precede this command with
	AT or press RETURN to execute.
Command:	&An	Answerback
Values:	n = 0 or 1
Default:	0
Description:	&A0	Disables answerback.
	&A1	Enables answerback reply to an ID request.
Command:	$An	Auto-Reliable Buffering
Values:	n = 0 or 1
Default:	0
Description:	$A0 Discard data received during establishment of a reliable connection.
	$A1 Buffer data received during establishment of a reliable connection.
Command:	#An Auto Speed Detection in Answer Mode
Values:	n = 0–3
Default:	0
Description:	#A0 Start at maximum speed and fall back to a lower speed (26400, 24000, 21600, 19200, 16800,
	14400, 12000, 9600, 7200, 4800, 2400, 1200, or 300 bps) as line conditions warrant.
	#A1 Maximum speed only.
	#A2 Start at maximum speed and fall back decrementally to 4800 bps only.
	#A3 Start at 2400 bps and fall back to 1200 to 300 bps only.
Command:	&BSn Maximum Reliable Block Size
Values:	n = 0 or 1
Default:	1
Description:	&BS0 Maximum transmit block size of 64 characters.
	&BS1 Maximum transmit block size of 256 characters.

Multi-Tech Systems, Inc. MT2834ZDX User's Guide 8