Multi-Tech Systems MT2834ZDX User Manual
Page 14
Chapter 3 – AT Commands, S-Registers, and Results Codes
Multi-Tech Systems, Inc. MT2834ZDX User's Guide
14
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.)