AT Command Reference Manual
1048
7-19
#VRA - Ringback Goes Away Timer (Originate)
This command can be used, when originating a voice/audio call (#CLS=8) to set the “Ringback Goes Away” timer value, i.e.,
an amount of time (in units of 100 ms) measured from when the ringback cadence stops once detected. If ringback is not
detected within this period, the modem assumes that the remote has picked up the line and switches to Online Voice
Command Mode. Every time a ringback cycle is detected, this timer is reset.
Parameters:
n = 0 – 255 (0 – 2.55 seconds)
Default:
70
Result Code:
OK
Result Code:
OK
If n = 0 – 255.
ERROR
Otherwise.
Command options:
#VRA?
Returns the current setting of the #VRA command as an ASCII decimal value in result code
format.
#VRA=?
Returns the message, “0-255”.
#VRA=0
Turns off the “ringback goes away timer.” After one ringback, the dialing modem sends VCON
and enters Online Voice Command Mode immediately.
#VRA=n
Where n defines the period without ringback (after at least one ringback has been detected) in
100 ms units.
#VRN - Ringback Never Came Timer (Originate)
This command can be used when originating a voice/audio 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 – 2.55 seconds)
Default:
100
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 “ringback 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.
#VRX - Voice Receive
This action 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/audio transfer from modem to DTE can begin.
ERROR
If #VLS=0 and not connected to any input device.
Summary of Contents for RCV144ACx
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