US Robotics 56K USB Modem User Manual page 90

+VRA=<interval>—Ringing Tone Goes Away Timer
Use this command to set the ringing tone goes away timer before originating a call. The ringing tone
goes away timer defines the amount of time the modem waits between ringing tones before assuming that
the remote station has gone off-hook. The default is 50, and each value represents a 0.1 second
increment.
Result codes:
• OK if <interval> = 0—255.
ERROR if <interval> ≠ 0—255.
•
Table 191. +VRA Extended Syntax Commands
Command
+VRA=<interval> Sets the ringing tone goes away timer.
+VRA? Displays the current value.
+VRA=? Displays the range of supported timer values.
+VRN=<interval>—Ringing Tone Never Appeared Timer
Use this command to set the ringing tone never appeared timer before originating a call. The ringing
tone never appeared timer defines the amount of time that the modem waits for an initial ringing tone. If a
ringing tone is not detected within this interval, the modem assumes that the remote station has gone off-
hook. The default is 10, and each value represents a one-second increment.
Result codes:
• OK if <interval> = 0—255.
ERROR if <interval> ≠ 0—255.
•
Table 192. +VRN Extended Syntax Commands
Command
+VRN=<interval> Sets the ringing tone never appeared timer.
+VRN? Displays the current value.
+VRN=? Displays the range of supported timer values.
+VRX—Enter Voice Receive Data State
Use this command to initiate the voice receive state with the voice stream received through the comm port.
Applications using the wave interface do not use the +VRX command. The modem returns the CONNECT
result code to the DTE.
There are two ways for the DCE to leave the voice receive state:
• Modem receives <DLE>-! from the DTE.
• Upon expiration of the silence detection timer, the modem passes <DLE> shielded event codes indi-
cating a presumed hang-up (<DLE>-s) or presumed end-of-message (<DLE-q>).
Function
Function
56K USB Modem
User Guide
Command Reference - 84