ZyXEL Communications 2864 Series, User Manual, Page: 192 / 267

16–16
The DCE returns the
VCON
result code (returns
OK
if
S48.5=1
) if the DCE ac-
cepts this command, or it returns the ERROR result code if the <device> value is
not permitted.
• AT+V LS ?
The DCE will return the current I/O device followed by the
OK
result code.
• AT+V LS =?
The DCE will return permitted I/O devices. The response is:
0,1,2,8,16
OK
• AT+V RA =<
interval
>
The DCE only uses this command in a call origination transaction. This command
sets the amount of time the DCE shall wait between ringbacks before the DCE can
assume that the remote station has gone off-hook. The default value is 70 (7 sec-
onds). The range of <interval> is from 0 to 255. The units are 0.1 seconds. A value
of zero forces the DCE to return the
OK
result code immediately after the first ring-
back.
The <interval> subparameter refers to the silence interval length between the end of
one ring interval and the start of the next ring interval. The DCE returns the
OK
re-
sult code if the DCE accepts this command, or it returns the
ERROR
result code if
the <interval> is out of range.
• AT+V RA ?
The DCE will return the current Ringback Goes Away Timer interval value, fol-
lowed by the OK result code.
• AT+V RA =?
The DCE will return the permitted interval of the Ringback Goes Away Timer. The
response is:
0-255
OK
• AT+V RN =<
interval
>
The DCE only uses this command in a call origination transaction. This command
sets the amount of time the DCE will wait looking for a ringback. If the DCE does
not detect a ringback within this time period, the DCE assumes that the remote
station has gone off-hook, and returns an
OK
result code.
A
+VRN
setting higher than the value in the
S7
register means that only the
S7
timer is in effect. The range of <
interval
> is from 0 to 255. The unit is 1 sec-
ond. The default value is 10 (10 seconds). A value of zero forces the DCE to return
OK
immediately after dialing.