Silicon Laboratories SI2493/57/34/15/04 - Manual (Page 75)

AN93
Rev. 1.3 75
+VRA = n Ringing Tone Goes Away Timer.
The ISOmodem only uses this command in call origination trans-
actions. This command sets the amount of time in 0.1 second units
the ISOmodem shall wait between Ringing Tone before it can
assume that the remote modem has gone off-hook. Default time
is five seconds.
+VRID = n Repeat Caller ID.
n Description
0
Display Caller ID information of the last incoming
call in formatted form.
1
Display Caller ID information of the last incoming
call in unformatted form.
+VRN = n Ringing Tone Never Appeared Timer.
This command sets the amount of time in seconds the ISOmodem
will wait looking for Ringing Tone. If the ISOmodem does not
detect Ringing Tone in this time period, the ISOmodem shall
assume that the remote station has gone off-hook and return an
OK result code. Default time is 0 seconds.
+VRX Receive Voice Stream.
Enable DTE receive of voice stream. The DCE will return a CON-
NECT response followed by the voice stream as defined by the
+VSM command. The DTE can issue a <DLE><!> or
<DLE><ESC> sequence to terminate the receive stream. The
DCE will return a <DLE><ETX> followed by an OK response for
<DLE><!> and <DLE><ESC> followed by an OK response for
<DLE><ESC>. The DCE can be configured to terminate the
stream using the DTE/DCE Inactivity Timer, which is configured
using the +VIT command. The DTE will need to process any
<DLE> shielded events present in the data stream. Any
<DLE><DLE> sequences can be preserved to allow less overhead
during playback of the stream with the +VTX command.
+VSD =
<sds>, <sdi> Silence Detection.
<sds>
Noise level sensitivity
127 Less aggressive [more sensitive, lower noise lev-
els considered to be silence].
128 Nominal level of sensitivity.
129 More aggressive [less sensitive, higher noise lev-
els considered to be silence].
<sdi> sets the length of a time interval in 0.1 second units, which
must contain no or little activity, before the ISOmodem will report
(QUIET) (<DLE><q>). Default is five seconds.
Table 39. Basic AT Command Set (Continued)
Command Action