+VRA=interval Set Ring Back Goes Away Timer

			Chapter 6 – Voice Commands
	3	LT	Modem off-hook. Local phone connected to Telco. Modem connected to
			Telco.
	4	S	Internal speaker connected to the modem. Modem is on-hook. Local phone
			connected to Telco.
	5	ST	Internal speaker connected to Telco. Modem is off-hook. Modem is
			connected to Telco. Local phone provided with power to detect hook
			condition.
	6	M	Internal microphone connected to modem. Modem is on-hook. Local phone
			connected to Telco.
	7	MST	Internal microphone and internal speaker connected to Telco. Squelching
			active. Modem is off-hook, and connected to Telco. Local phone provided
			with power to detect hook condition.
	8	S1	External speaker connected to modem. Modem is on-hook. Local phone
			connected to Telco.
	9	S1T	External speaker connected to Telco. Modem is off-hook and connected to
			Telco. Local phone provided with power to detect hook condition.
	10	MS1T	Internal microphone and external speaker connected to Telco. Squelching
			active. Modem is off-hook, and connected to Telco. Local phone provided
			with power to detect hook condition.
	11	M1	External microphone connected to modem. Modem is off-hook. Local phone
			connected to Telco.
	12	M1ST	External microphone and internal speaker connected to Telco. Squelching
			active. Modem is off-hook, and connected to Telco.
			Local phone provided with power to detect hook condition.
	13	M1S1T	External microphone and external speaker connected to Telco. Squelching
			active. Modem is off-hook, and connected to Telco. Local phone provided
			with power to detect hook condition.
	14	H	External microphone and speaker combination (handset or headset)
			connected to modem. Modem is off-hook. Local phone connected to Telco.
	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>,trasmit 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 Ringbacks 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.

SocketModem Global MT5634SMI Developer’s Guide

MST

S1T

MS1T

M1ST

M1S1T

+VRA=<interval>

Set Ring Back Goes Away Timer