Intel MD566X - Manual (Page 91)

56K V.92 Data, Fax, and Voice Chipset
Programmer’s Guide Intel Confidential 91
+VRA=n 50
Ringback-Goes-Away Timer: After originating a call in voice mode, this com-
mand selects the length of time the DCE waits between ringbacks before the
DCE assumes the remote party has gone off hook. After dialing a phone number
and detecting a ringback, the modem sends <DLE><O> to the DTE if another ring-
back is not detected within this timer value. This indicates that the remote tele-
phone has been picked up (that is, gone off-hook). The ringback-goes-away timer
is reset every time a new ringback is detected.
n = 0–50 (in 100-ms increments)
n = 0 The DCE returns the ‘OK’ code immediately after ringback.
n = 50* (50 = 5.0 seconds)*
+VRN=n 10
Ringback-Never-Appeared Timer: This command sets the length of time the
DCE waits for ringback when originating a call in voice mode. After dialing a
phone number, the modem sends an ‘Error’ result code to the DTE if ringback is
not detected before the timer value elapses. This may indicate one of several
conditions: the remote telephone was picked up before the ringback tone was
generated; the number is no longer in service; or the number was incomplete.
This timer is disabled after detecting the first ringback.
n = 0–255 (in 1-second increments)
n = 0 The DCE immediately returns the OK result code after dialing
n = 10* (10 = 10 seconds)*
Table 6-1. Voice Mode Command Descriptions (Continued)