
Table of Contents
Multi-Tech Systems, Inc. AT Commands for the MultiModem & SocketModem MT9234 Series (S000434H) 3
Contents
Chapter 1 – AT Commands, S-Registers, and Result Codes ................................................................. 6
Introduction .............................................................................................................................................. 6
A Note About Fax Commands ................................................................................................................ 6
Data and General Commands................................................................................................................. 7
AT Attention Code ........................................................................................................................... 7
ENTER Key ........................................................................................................................................... 7
+++AT Escape Sequence .................................................................................................................. 7
A/ Repeat Last Command ................................................................................................................. 7
A Answer .......................................................................................................................................... 7
B Communication Standard Setting ................................................................................................. 7
D Dial ................................................................................................................................................ 8
E Echo Command ............................................................................................................................ 9
F Online Data Character Echo Command ....................................................................................... 9
H Hook Control ................................................................................................................................. 9
I Request ID Information .................................................................................................................. 10
M Monitor Speaker Mode ............................................................................................................... 10
N Modulation Handshake ............................................................................................................... 11
O Return Online to Data Mode ....................................................................................................... 11
P Set Pulse or Tone Dialing Default ............................................................................................... 11
Q Result Codes Enable/Disable ..................................................................................................... 11
Sr S-Register Control ...................................................................................................................... 12
T Select Tone Dialing ..................................................................................................................... 12
V Result Code Format .................................................................................................................... 12
W Result Code Options ................................................................................................................... 12
X Select Result Code and Monitor Call Progress .......................................................................... 13
Z Reset and Recall Stored Profile .................................................................................................. 13
&C Data Carrier Detect (DCD) Control .......................................................................................... 14
&D Data Terminal Ready (DTR) Control ....................................................................................... 14
&E XON/XOFF Pacing Control ...................................................................................................... 14
&F Restore Factory Default Configuration .................................................................................... 14
&G V.22bis Guard Tone Control .................................................................................................... 15
&K Local Flow Control Selection ................................................................................................... 15
&L Leased Line Operation ............................................................................................................... 15
&P Pulse Dial Make-to-Break Ratio Selection .............................................................................. 15
&Q Asynchronous Communications Mode .................................................................................... 16
&S Data Set Ready (DSR) ............................................................................................................ 16
&T Self-Test Commands ............................................................................................................... 16
&V View Active Configuration ........................................................................................................ 16
&W Store Current Configuration ..................................................................................................... 17
&Z Store Dialing Location and Number ........................................................................................ 17
\A Select Maximum MNP Block Size .............................................................................................. 17
\B Transmit Break ............................................................................................................................ 18
\K Break Control .............................................................................................................................. 18
\N Error Correction Mode Selection ................................................................................................ 19
\Q Local Flow Control Selection ...................................................................................................... 19
\T Inactivity Timer ............................................................................................................................ 19
\V Protocol Result Code .................................................................................................................. 19
\X XON/XOFF Pass-Through .......................................................................................................... 20
-C Data Calling Tone ...................................................................................................................... 20
%A Adaptive Answer Result Code Enable .................................................................................... 20
%B View Numbers in Blacklist ....................................................................................................... 20
%C Data Compression Control ...................................................................................................... 21
%DC AT Command Control ........................................................................................................... 21
%DT Set AT Command Mode Timer ............................................................................................ 21
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