Telenetics V.3600 Series, User Manual

Page: 81 / 273

AT Commands
V.3600 5-27
Synchronous Transmit Clock Source — &X
The
&X
commands select internal, external, or receive clock as the
transmit clock source.
V.34 Rate Selection Thresholds — *TH
The
*TH
commands sets the V.34 rate selection thresholds. The V.34
modulation dynamically selects the optimum bit rate to run, based on
line quality.
V.34 Asymmetric Bit Rates — *AS
The
*AS
command enables or disables the V.34 asymmetric bit rate
capability. This feature allows the modem to run different bit rates on
the receiver and transmitter.
Modulation *MM
The
*MM
command sets the current modulation type to use when
attempting to make a connection. Using this command automatically
selects the maximum DCE speed (
%B
) for the selected modulation.
Command Operation
&X Internal clock
&X1 External clock
&X2 Receive clock
Command Operation
*TH Low V.34 threshold (10
- 6
BER)
*TH1 Medium V.34 threshold (10
- 4
BER)
*TH2 High V.34 threshold (10
- 2
BER)
Command Operation
*AS Disable V.34 asymmetric bit rates
*AS1 Enable V.34 asymmetric bit rates
Command Operation
*MM Automode (typically used on dial line)
*MM1 V.21
*MM2 B103
*MM3 Reserved
*MM4 B212A