Multitech MT2834ZDX - Command Group: Register Read and DSR Control; Read Register Value; Data Set Ready (DSR) Control

Quick Reference Guide
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Command: S r ? 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: &S n 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.)
Command: &SF n DSR/CD Interaction Control
Values: n = 0 or 1
Default: 0
Description: &SF0 Select DSR to follow CD.
&SF1 Select DSR to be independent.
Command: $SB n Serial Port Baud Rate
Values: n = speed
Default: 57600
Description: $SB300 Set serial port to 300 bps.
$SB1200 Set serial port to 1200 bps.
$SB2400 Set serial port to 2400 bps.
$SB4800 Set serial port to 4800 bps.
$SB9600 Set serial port to 9600 bps.
$SB19200 Set serial port to 19200 bps.
$SB38400 Set serial port to 38400 bps.
$SB57600 Set serial port to 57600 bps.
$SB115200 Set serial port to 115200 bps.
Note: Baud adjust must be off ($BA0) to enable fixed baud rate.