
Table of Contents
Multi-Tech Systems, Inc. AT Commands for the MultiModem & SocketModem MT9234 Series (S000434H) 5
Voice Commands ................................................................................................................................... 44
Commands That Change for Voice Mode Support ............................................................................ 44
Voice +V Commands Detail .................................................................................................................. 45
+FCLASS=8 Select Voice Mode .................................................................................................... 45
+VNH Automatic Hang-Up Control ................................................................................................. 45
+VIP Initialize Voice Parameters ................................................................................................... 45
+VRX Enter Voice Receive State ................................................................................................... 45
+VTS Send Voice Tone(s) .............................................................................................................. 46
+VTX Start Voice Transmission Process ....................................................................................... 47
+VGR Voice Gain for Received Voice Samples ............................................................................. 47
+VGT Set the Volume for Transmitted Voice Samples .................................................................. 47
+VIT Set DTE/DCE Inactivity Timer .............................................................................................. 48
+VLS Select Analog Source/Destination ........................................................................................ 49
+VRA Ringback Goes Away Timer ................................................................................................. 50
+VRN Ringback Timer .................................................................................................................... 50
+VSD Silence Detection Sensitivity ................................................................................................ 51
+VSM Select Voice Compression Method ...................................................................................... 52
+VTD Beep Tone Duration Timer (DTMF/Tone Generation Duration) ........................................... 53
+VDR Distinctive Ring (Ring Cadence Reporting) .......................................................................... 53
+VEM Event Reporting and Masking .............................................................................................. 54
Interface Configuration Commands .................................................................................................... 55
+VBT Set Modem Flow Control Assert and Deassert Points ......................................................... 55
+VPP Enable or Disable Voice Mode Packet Protocol................................................................... 56
+VPR Select DTE/DCE Interface Rate (Turn Off Autobaud) .......................................................... 56
Flow Control ........................................................................................................................................... 57
Voice Mode Result Codes ..................................................................................................................... 57
Unsolicited Voice Mode Result Codes ................................................................................................ 58
Valid Complex Event Report Tags ...................................................................................................... 58
Voice Mode Shielded Codes ................................................................................................................. 59
DTE/DCE Interface Rates ...................................................................................................................... 61
Chapter 5 – Country/Regional Code Configuration ............................................................................... 62
Index ........................................................................................................................................................... 63
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