45
one ringback has been detected)in 100 ms units.
AT#VRN Ringback Never Came Timer(Originate)
This command can be used when originating a voice call(#CLS=8)to set
the "Ringback Never Came" timer value, i.e., an amount of time (in
units of 100 ms) measured from completion of dialing. If ringback is
not detected within this period, the modem assumes the remote has
picked up the line and switches to Online Voice Command Mode.
Parameters: n=0-255 (0-25.5 seconds); Default: 100 (10,000ms)
Result Code: OK If n=0-255.
ERROR Otherwise.
Command options:
#VRN? Returns the current setting of the #VRN command as an ASCII
decimal value in result code format.
#VRN=? Returns the message,"0-255".
#VRN=0 Turns off the "righback never came timer". After dialing, the
modem sends VCON and immediately enters Online Voice Command
Mode.
#VRN=n Where n defines the period without ringback after dialing in
100 ms units.
AT#VRX Voice Receive
This acting command is only valid if the modem is in the Online Voice
Command Mode (indicated previously with the VCON message), and is the
switch to the Voice Receive Mode. This command is used when a voice
file is to be received from the line, microphone, or handset. The #VLS
command should have been previously issued to select the input source.
Parameters: None
Result Codes:
CONNECT When voice transfer from modem to DTE can begin.
ERROR If #VLS=0 and not connected to any input device.
AT#VSD Enable Silence Detection (Voice Receive)
This command is used to enable or disable Voice Receive Mode silence deletion.
Parameters: n=0 or 1; Default: 0 or 1
Result Code: OK If n=1
ERROR Otherwise
Command options:
#VSD? Returns the current setting of the #VSD command as an ASCII
decimal value in result code format.
#VSD=? Returns the message ,"1".
#VSD=0 Turns off the silence deletion.
#VSD=1 Turns on the silence deletion if the silence sensitivity
setting #VSS is nonzero. The aggressiveness of the silence
deletion is controlled by #VSS.
AT#VSK Buffer Skid Setting
This command queries and sets the number of bytes of spare space,
after the XOFF threshold is reached, in the modem's buffer during
Voice Transmit Mode. This equates to the "skid" spare buffer space, or
the amount of data the DTE can continue to send after being told to
stop sending data by the modem, before the modem voice transmit
buffer overflows.
Parameter: n=255 (Number of bytes of "skid spare buffer space")
Default: 255
Result Code: OK If n=255
