Longshine LCS-8156C1 - Manual (Page 179)

AT Commands for CX930xx Modem Reference Manual
102752B Conexant 5-15
+VRA - Ringback Goes Away Timer
This command sets the length of time the modem will wait between ringbacks during call
origination before the modem can assume that the remote station has gone off-hook.
Syntax
+VRA=
Defined Values
Decimal number (0-255) specifying the silence interval time
in units of 0.10 second between the end of one ring interval
and the start of the next ring interval. A value of 0 forces the
modem to report the OK result code immediately after the first
Ringback. The range is 0.1 to 25.5 seconds for = 1
to 255.
Reporting Current or Selected Values
Command: +VRA?
Response:
Example: 50 (5 seconds) For the default setting.
Reporting Supported Range of Parameter Values
Command: +VRA=?
Response: ( range)
Example: (0-255) 255 = 25.5 sec
Result Codes
OK = 0-255
ERROR Otherwise, or if not in Voice Mode.