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Host-Based Controller Modem Data Addendum
AT Command Set June 15, 1998
42 Version 1.0 Lucent Technologies Inc.
AT Voice Command Set
The AT Voice Command set follows a modified IS-101 architecture. The commands are sent through the comm
port, but the data path is sent either through the comm port or through a DMA channel using the wave driver.
Tables 1 and 2 show a summary of the AT Voice Command Set.
Summary of the AT Voice Command Set
Table 6. The AT Voice Command Set
Voice Commands
Command Description
AT+FCLASS=8 Enter voice mode
AT+VIP Initialize voice parameters
AT+VCID Caller ID
AT+VDR Distinctive ring
AT+VGT Speaker volume control
AT+VIT DTE/DCE inactivity timer
AT+VNH Automatic hang-up control
AT+VTD Set beep tone duration timer
AT+VLS Analog source/destination selection and DTMF/tone reporting
AT+VSD Set silence detection timer
AT+VRA Set ringback goes away timer
AT+VRN Set ringback never came timer
AT+VTS DTMF/tone generation
AT+VTR Start full duplex voice transmission and reception process
AT+VTX Enter voice transmit state (see examples)
AT+VRX Enter voice receive state (see examples)
AT+VSM Voice compression method
AT+VEM Event reporting and masking
AT+VGR Receive gain selection
AT+VPR Select DTE/DCE interface rate
Table 7. The AT Voice Command Set Not Defined In IS-101 Specification
Command Description
ATS32 Synthetic ring volume
ATS33 Synthesized ring frequency