Black Box MD1000C Guía de usuario descargar pdf (Pagina 83)

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.

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

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Black Box MD1000C Guía de usuario Pagina 83