Multitech RouteFinder MTASR3, User Manual, Page: 86 / 113

Appendixes
MTASR3-200 86
Appendix D - AT Command Summary
This Appendix summarizes the AT commands for the RASFinder modems.
Command: +++AT<CR> Escape Sequence
Values:
n/a
Description: Puts the modem in command mode (and optionally issues a command) while remaining on-line.
Type +++AT and up to ten command characters, then press ENTER. Used mostly to issue the
hang-up command: +++ATH<CR>.
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 key to execute most commands.
Command: $ Detect AT&T's "call card" tone
Values: 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 when originating an on-line connection--
Command: A Answer
Values: n/a
Description: Answer an incoming call before the final ring.
Command: A/ Repeat Last Command
Values: n/a
Description: Repeat the last command string. Do not precede this command with AT. Do not press ENTER to
execute.
Command: B n 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: C n Carrier Control
Values: n = 1
Default: 1
Description: C0 Transmit carrier always off. (Not supported.)
C1 Normal transmit carrier switching (included for backward compatibility with some software).