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Chapter 4 - Commands
4.1 Modem AT Commands

AT commands are the means by which you, and your communications

software, are able to communicate with and configure your modem. They

enable you to establish, read, and modify parameters in addition to dialing.

The following provides a summary and brief explanation of the AT

commands recognized by the MT2834.

COMMAND: AT
VALUES: n/a
DEFAULT: n/a
DESCRIPTION: Attention Code that precedes most command strings
except A/, A: and Escape Codes.
COMMAND: Return
VALUES: n/a
DEFAULT: n/a
DESCRIPTION: Pressing the RETURN key executes most commands.
COMMAND: A
VALUES: n/a
DEFAULT: n/a
DESCRIPTION: Answer call, even if no ring present.
COMMAND: $
VALUES: n/a
DEFAULT: n/a
DESCRIPTION: This symbol placed in dialing string enables the modem to
detect AT&T's "call card" tones to access user's calling
card to originate an on-line connection.
COMMAND: A/
VALUES: n/a
DEFAULT: n/a
DESCRIPTION: Repeat last command. (Do not precede this command with
AT. Do not hit RETURN to execute).
COMMAND: A:
VALUES: n/a
DEFAULT: n/a
DESCRIPTION: Continuous redial (10 redials in DOC units) of last number
until answered. (Not used on International Models).