Multi-Tech Systems ISI5634PCI/4/8 manual AT Command Summary, Answer, RepeatLastCommand

Chapter 4—AT Commands, S-Registers, Result Codes

connecting to another modem. For a table of valid result codes, see Result Codes at the end of this chapter.

You can issue several commands in one line, in what is called a command string. The command string begins with AT and ends when you press ENTER. Spaces to separate the commands are optional; they are ignored by the command interpreter. The most familiar command string is the initialization string, which is used to configure the modem when it is turned on or reset or when your communications software calls another modem.

AT Command Summary

Command: AT	AttentionCode
Values:	n/a
Description:	The attention code precedes all command lines except
	A/, A:, and escape sequences.
Command: ENTERkey
Values:	n/a
Description:	Press ENTER (RETURN) to execute most commands.
Command: A	Answer
Values:	n/a
Description:	Answer call before final ring.
Command: A/	RepeatLastCommand
Values:	n/a
Description:	Repeat the last command string. Do not precede this
	command with AT. Do not press ENTER to execute.
Command: Bn	CommunicationStandardSetting
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.

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