Multi-Tech Systems MT2834ZDX manual Rn Clear to Send Control, RAn Asymmetrical Bit Rate

		Chapter 3 – AT Commands, S-Registers, and Results Codes
Command:	&Rn Clear to Send Control
Values:	n = 0, 1, or 2
Default:	1
Description:	&R0 Let CTS state follow RTS state when on line.
	&R1 Force CTS high (on).
	&R2 Let CTS drop on disconnect for time set by S24, then go high again.
Command:	&RAn	Asymmetrical Bit Rate
Values:	n = 0 or 1
Default:	0
Description:	&RA0 Enable asymmetrical bit rate in V.34 mode.
	&RA1 Disable asymmetrical bit rate in V.34 mode.
Command:	&RDn Square Wave Ring Detect
Values:	n = 0 or 1
Default:	1
Description:	&RD0 Modem detects only sine wave rings.
	&RD1 Modem detects both sine and square wave rings.
Command:	&RFn	CTS/RTS Interaction Control
Values:	n = 0 or 1
Default:	1
Description:	&RF0 Let CTS follow RTS.
	&RF1 Let CTS act independently (use with &R).
Command:	&RN	Rate Negotiation
Values:	n/a
Description:	Forces the modem to perform a rate renegotiation while on line. You must escape to command
	mode to issue this command.
Command:	&RP	Immediate Line Probe
Values:	n/a
Description:	Initiates a retrain that makes the processor read line probe information if %DP1 is selected. Valid
	only when on line in V.34 mode.
Command:	&RR	Immediate Retrain
Values:	n/a
Description:	Forces the modem to perform an immediate retrain while on line. You must escape to command
	mode to issue this command.
Command:	$Rn	Retransmit Count
Values:	n = 0 or 1
Default:	0
Description:	$R0 Disconnect after 50 retransmits of a data block.
	$R1 Do not disconnect after 50 retransmits.
Command:	Sr=n	Set Register Value
Values:	r = S-register number; n varies
Default:	None
Description:	Set value of register S r to value of n, where n is entered in decimal format.
Command:	Sr?	Read Register Value
Values:	r = S-register number
Default:	None
Description:	Read value of register S r and display value in 3- digit decimal form.
Command:	&Sn Data Set Ready Control
Values:	n = 0, 1, or 2
Default:	1
Description:	&S0 Force DSR high (on).
	&S1 Let DSR follow CD.
	&S2 DSR drops on disconnect, then goes high again. (Used by some CBX phone systems.)

Multi-Tech Systems, Inc. MT2834ZDX User's Guide 14