Multi-Tech Systems MT5634SMI V.92 At+Vls=?, Command +VRA=interval Set Ring Back Goes Away Timer

		Chapter 4 – Voice Commands
15	HT	External microphone and speaker combination (headset or handset)
		connected to modem. Modem is off hook, and connected to Telco. Local
		phone provided with power to detect hook condition.

Command:	+VLS=?	Identify Analog Source/Destination Configuration and Event
		Reporting Capabilities
Result Codes:	<label>,<devices>,transmit event>,<receive event>,<idle event>
Description:	The +VLS=? command displays the modem's current source and destination device
	information for the analog data to be transmitted. Refer to the +VLS= <label> command
	for label code and description information. Note that the +VEM command contains more
	information about event reporting.
	Example: In the lines below, the modem reports that it supports only a Telco line at
	Service Level C.
	AT+VLS=?
	0,"",0A0001000,0E601800,1A803840
	1, "T", 0A0001000,0E601800,1A803840
	OK
Command:	+VRA=<interval>		Set Ring Back Goes Away Timer
Values:	0–50 (in 0.10 second increments)
Default:	50
Result Codes:	OK if the modem accepts the command; ERROR if the <interval> parameter entered is
	out of range.
Description:	The +VRA= command sets the amount of time the modem will wait between ring backs
	before the modem can assume that the remote device has gone off-hook. This
	command does not effect the Quiet Answer @ dial modifier; the +VRA command
	functions the same as the @ entered at the end of a dial string. Entering +VRA=0 forces
	the modem to return the OK result code immediately after the first Ring Back. The
	parameter <interval> refers to the silence interval length between the end of one ring
	interval and the start of the next ring interval.
Command:	+VRN=<interval>		Set Ring Back Never Appeared Timer
Values:	0–10 (in 1.0 second increments)
Default:	10
Result Codes:	OK if modem accepts the command; ERROR if the <interval> parameter entered is out of
	range.
Description:	The +VRN= command sets the amount of time that the modem will wait for Ring Back. If
	the modem does not detect a Ring Back within the time period <interval>, the modem
	assumes that the remote device has gone off hook, and returns the OK result code. The

modem only uses this command in call origination transactions. A +VRN= setting greater than the S-Register S7 setting means that only the S7 timer is in effect. Entering +VRA=0 forces the modem to return the OK result code immediately after dialing

Multi-Tech Systems, Inc. SocketModem MT5634SMIxx Reference Guide (S000263C) 112