Appendix C - At Command Summary - Multitech MT2834BA Series User Manual

Appendix C - AT Command Summary

Command
AT
RETURN
$
A
A:
$An
#An
Bn
&Bn
&BSn
$BAn
&Cn
&CDn
Ds
*Factory Default
Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide
Values Description
Attention Code that precedes most command strings
except A/, A: and Escape Codes.
Pressing RETURN key executes most commands.
This symbol placed in dialing string enables the
modem to detect AT&T's "call card" tones for
accessing user's calling card to originate an on-line
connection.
Answer call, even if no ring present. Repeat last
command. (Do not precede this command with AT.
Do not hit RETURN to execute.)
Continuous redial (10 redials in DOC units) of last
number until answered. (Not used Internationally.)
n = 0 or 1 * $A0 discards data during auto-reliable time period.
$A1 buffers data during auto-reliable time period.
n = 0 thru 3 * #A0 selects initial handshake at:33,600 to 31,200 to
28,800 to 24000 to 21,600 to 19,200 to 16,800 to
14,400 to 12,000 to 9600 to 4800 to 2400 to 1200 to
300 bps.
#A1 selects initial handshake at 33,600 bps only.
#A2 selects initial handshake at 33,600 to 31,200 to
28,800 to 24000 to 21600 to 19,200 to 16,800
19,200 to 14,400 to 9600 to 4800 bps.
#A3 selects initial handshake at 2400 to 1200 to 300
bps.
* Factory Default Setting
n = 0 or 1 * B0 selects V.21 answer tone.
B1 selects Bell answer tone.
n = 0 or 1 * &B0 means normal transmit buffer size.
&B1 means reduced transmit buffer size.
n = 0 or 1 &BS0 means maximum transmit block size of 64
characters.
* &BS1 means maximum transmit block size of 256
characters.
n = 0 or 1 * $BA0 means speed conversion is on.
$BA1 means speed conversion is off.
n = 0,1,2,4 &C0 forces Carrier Detect on.
* &C1 lets Carrier Detect act normally.
&C2 lets Carrier Detect drop S24 time on
disconnect.
&C4 resets modem when Carrier Detect drops.
n = 0 or 1 * &CD0 execute cleardown on disconnect.
&CD1 do not execute cleardown on disconnect.
s = phone # Dial a telephone number "s," where s may include
up to 60 digits or T, P, R, comma and ; characters.
Appendix C - AT Command Summary
99