User Guide

Command:

&Bn

V.32 Auto Retrain

Values:

 

n = 1

Default:

 

1

Description:

&B0

Disable V.32 auto retrain. (Not supported.)

 

&B1

Enable V.32 auto retrain.

Command:

&Cn

Data Carrier Detect (DCD) Control

Values:

 

n = 0 or 1

Default:

 

1

Description:

&C0

Forces the DCD circuit to be always high.

 

&C1

DCD goes high when the remote modem’s carrier

 

 

signal is detected, and goes low when the carrier

 

 

signal is not detected.

Command:

&Dn

Data Terminal Ready (DTR) Control

Values:

 

n = 0, 1, 2, or 3

Default:

 

2

Description:

&D0

Modem ignores the true status of the DTR signal

 

 

and responds as if it is always on.

 

&D1

If DTR drops while in online data mode, the mo-

 

 

dem enters command mode, issues an OK, and

 

 

remains connected.

 

&D2

If DTR drops while in online data mode, the mo-

 

 

dem hangs up. If the signal is not present, the

 

 

modem will not answer or dial.

 

&D3

If DTR drops, the modem hangs up and resets as

 

 

if an ATZ command were issued.

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Multi-Tech Systems MT5634ZBAV manual Auto Retrain, Data Carrier Detect DCD Control, Data Terminal Ready DTR Control