Specifications

Chapter 1 – Universal Socket Connectivity
Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342C) 9
AT Commands, Fax Commands, and Voice
Commands
AT Commands
Multi-Tech provides Reference Guides for each SocketModem's AT commands, fax commands, and voice
commands. These reference guides are available on the CD included in the Developer Kit. They are also available by
email at [e-mail] or by request using the Developer Guide Request Form on Multi-Tech's Web site.
Fax Commands
Fax Commands are included in the AT Command Reference Guide when applicable to the product. They are
available on the CD included in the Developer Kit.
Note: Fax Commands supported by product:
• SocketModem MT5600SMI supports Class 1 & 1.0
• SocketModem MT5656SMI supports Class 1 & 2 (not 2.0/2.1)
• SocketModem MT5634SMI supports all Class 1 and Class 2 commands (Class 1, 1.0, 2, 2.0/2.1)
• Wireless GSM/GPRS MTSMC-G supports Class 1 core commands only (defined by ITU T.31)
• Wireless CDMA MTSMC-C supports Class 2.0
Voice Commands
Voice Commands Reference Guides are available on the CD included in the Developer Kit.
• SocketModem MT5600SMI supports +V commands
• SocketModem MT5656SMI supports +V (including speakerphone)
• SocketModem MT5634SMI supports +V commands
Table of Commands
Note: The following is a list of Reference Manuals available at the time of this Hardware Guide's publication.
Product AT Commands Fax Commands Voice Commands
SocketModem
(MT5600SMI)
MT5600SMI/MT5656SMI
AT Commands Reference
Guide # S000306B
MT5600/5656SMI Class 1 &
2 Fax Commands included in
guide # S000306B
MT5600/5656SMI Voice
Commands included in
Guide # S000306B
SocketModem
(MT5656SMI)
MT5600/5656SMI AT
Commands Reference
Guide # S000306B
MT5600/5656SMI Class 1 & 2
Fax Commands included in
Guide # S000306B
MT5600/5656SMI Voice
Commands included in
Guide # S000306B
SocketModem
(MT5634SMI-xx)
MT5634SMI AT
Commands Reference
Guide # S000263C
MT5634SMI Class 1 & 2 Fax
Commands included in
Guide # S000263C
MT5634SMI Voice
Commands included in
Guide # S000263C
SocketModem
(MT2456SMI-22)
MT2456SMI-22 AT
Commands
Guide # S000281D
Fax Not Supported Voice Not Supported
SocketModem IP
(MT2456SMI-IP)
MT2456SMI-IP Command
Line Interface
Guide # S000307C
Fax Not Supported Voice Not Supported
SocketEthernet IP
(MTXCSEM)
MTXCSEM Command Line
Interface
Guide # S000278G
Fax Not Supported Voice Not Supported
SocketModem ISDN
(MT128SMI)
MT128SMI AT Commands
Guide # S000352B
Fax Not Supported Voice Not Supported
SocketModem GPRS
(MTSMC-G)
GSM/GPRS AT
Commands
Guide # S000293C and
IP AT Commands
Guide # S000333A
GSM/GPRS applicable Fax
Commands included in
Guide # S000293C
Voice Not Supported
SocketModem CDMA
(MTSMC-C)
CDMA AT Commands
Guide # S000294D
CDMA applicable Fax
Commands included in
Guide # S000294D
Voice Not Supported
SocketWireless
Bluetooth
(MTS2BTSMI)
SocketWireless Bluetooth
AT Commands
Guide # S000360B
Fax Not Supported Voice Not Supported