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56
Command: &B
n
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: &C
n
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: &D
n
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.