
Table of Contents
Multi-Tech Systems, Inc. AT Commands for the MultiModem & SocketModem MT9234 Series (S000434H) 4
%E Fallback and Fall Forward Control........................................................................................... 21
%H Set Callback Security – Direct Connect Enable ...................................................................... 21
%S Command Speed Response ................................................................................................... 22
+A8E V.8 and V.8bis Operation Controls ....................................................................................... 22
+A8T Send V.8 bis Signal and/or Message ................................................................................... 23
+DCS Select V.42bis or V.44 Data Compression ........................................................................... 23
+DR V.44 Data Compression Reporting .......................................................................................... 24
+DS V.42bis Data Compression ...................................................................................................... 24
+DS44 V.44 Data Compression .................................................................................................... 25
+EB Break Handling in Error Control Operation .............................................................................. 26
+EFCS 32-bit Frame Check Sequence ......................................................................................... 26
+ER Error Control Report ................................................................................................................ 26
+ES Error Control Selection ............................................................................................................ 27
+ESA Set Up Error Control Parameters ......................................................................................... 27
+ETBM Call Termination Buffer Management ............................................................................... 27
+FCLASS Fax Class Indication ........................................................................................................ 28
+GCAP Complete List of Capabilities Request .............................................................................. 28
+GCI= Country of Installation ........................................................................................................... 28
+GMI Manufacturer Identification Request .................................................................................... 28
+GMM Model Identification Request ................................................................................................ 28
+GMR Revision Request ................................................................................................................. 29
+IFC DTE-DCE Local Flow Control .............................................................................................. 29
+ILRR DTE-DCE Local Rate Reporting .......................................................................................... 29
+IPR Fixed DTE Rate .................................................................................................................... 29
+ITF Transmit Flow Control Threshold ............................................................................................ 30
+MR Modulation Reporting Control .............................................................................................. 30
+MS Modulation Selection ............................................................................................................... 30
$D DTR Dialing ............................................................................................................................. 32
$EB Asynchronous Word Length .................................................................................................... 32
$FC Quick Connect ......................................................................................................................... 32
$LB Long Break .............................................................................................................................. 32
$LL Implements V.34 Handshake .................................................................................................. 32
$MB Online BPS Speed ................................................................................................................... 33
$RP Ring Priority vs. AT Command Priority .................................................................................... 33
$SB Serial Port Baud Rate .............................................................................................................. 33
+VDR Distinctive Ring Report ......................................................................................................... 34
#P Set 11-bit Parity .......................................................................................................................... 34
#S Enter Setup Password ................................................................................................................ 34
#S= Store Setup Password ................................................................................................................ 34
%%%ATMTSMODEM Remote Configuration Escape Sequence ................................................... 35
+VCID Caller ID Selection ................................................................................................................ 35
Callback Security Commands .............................................................................................................. 36
#CBA Callback Attempts ................................................................................................................ 36
#CBD Callback Delay ..................................................................................................................... 36
#CBF? Callback Failed Attempts Display ..................................................................................... 36
#CBFR Callback Failed Attempts Reset ........................................................................................ 36
#CBI Local Callback Inactivity Timer ............................................................................................. 36
#CBN Store Callback Password ..................................................................................................... 36
#CBP Callback Parity ..................................................................................................................... 37
#CBR Callback Security Reset ....................................................................................................... 37
#CBS Callback Enable/Disable ...................................................................................................... 37
S-Registers ............................................................................................................................................. 38
Result Codes .......................................................................................................................................... 41
Chapter 4 – Voice Commands ................................................................................................................. 43
Introduction ............................................................................................................................................ 43
Voice S-Register Summary ................................................................................................................... 44
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