Motorola SM56 manual +Vem, +Vgr, +Vgt, +Vip, +Vls, +Vnh, +Vpr, +Vra

Table 4: AT+ (Plus) Commands

Command	Option	Description
	1-255	Produce DROFF/DRON, followed by RING after
		delay of n/10 seconds
+VEM		Event Reporting and Masking Control
		Data/Fax/Speakerphone modem only
		Bit-mapped event control mask. See Event Report-
		ing Word.
+VGR		Receive Gain
		Data/Fax/Speakerphone modem only
	0	Automatic Gain Control
	1-255	Relative range, where 128 indicates a nominal value.
+VGT		Transmit Volume
		Data/Fax/Speakerphone modem only
	1-255	"Relative range, where 128 indicates a nominal
		value.
+VIP		Initialize Voice Parameters
		Data/Fax/Speakerphone modem only
		Set speakerphone parameters to factory-default
		options.
+VLS		Select Analog Source and Destination
		Data/Fax/Speakerphone modem only
	0	DCE (modem) on-hook
	1	DCE off-hook, DCE connected to telco
	8	DCE on-hook, DCE connected to speaker
	9	speakerphone with mute enabled
	11	DCE on-hook, DCE connected to microphone
	13	DCE off-hook, DCE connected to telco, speaker, and
		microphone (speakerphone)
+VNH		Automatic Hangup Control
		Data/Fax/Speakerphone modem only
	+VNH=0	Retain automatic hang-ups
	+VNH=1	Disable DCE-initiated automatic hang-ups
	+VNH=2	Disable all Automatic hang-ups
+VPR		Voice DTE-DCE Rate
		Data/Fax/Speakerphone modem only
	+VPR=0	Autobaud
+VRA		Ringback Gone Timer
		Data/Fax/Speakerphone modem only

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