Silicon Laboratories SI2494/39 Ringing Tone Goes Away Timer, Is five seconds, Repeat Caller ID

AN93

	Table 39. Basic AT Command Set (Continued)
Command			Action
+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 =		Silence Detection.
<sds>, <sdi>		<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.

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