Black Box 3600 MODEM Manual De Usuario
AT Commands
Modem 3600
5-27
Synchronous Transmit Clock Source &X
The &X commands select internal, external, or receive clock as the
transmit clock source.
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.
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.
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.
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