Black Box 32144, Manual

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CHAPTER 3: Options: Customizing the Modem Setup
NOTE
For Hayes mode operation,
the RX Space Disconnect
and TX Space Disconnect
options must both be
enabled or must both be
disabled.
TX (Transmit) Space Disconnect
Hayes, V.25 bis, Dumb modes
When TX Space Disconnect is
enabled, the modem will transmit
4 seconds of space prior to
disconnecting from the line. This
ensures a clean disconnect if RX
space disconnect is enabled on the
remote modem.
NOTE
For Hayes mode operation,
the TX Space Disconnect
and RX Space Disconnect
options must both be
enabled or must both be
disabled.
Carrier Disconnect
V.25 bis, Dumb modes
If enabled, a 400-ms loss of
carrier signal will cause the line
to be disconnected.
(To set this option for Hayes
mode, use S register S10.)
In Hayes mode, autobaud
overrides the front panel parity
setting; this occurs when the
modem receives the AT attention
code.
3.11 Disconnect Options
When the modem is operating in
V.25 bis or Dumb mode, it is
necessary to disconnect the modem
from the telephone circuit once
communications is completed. The
most common form of
disconnection is by dropping the
Data Terminal Ready (DTR) signal
from the DTE. However, some
applications may require one of the
five available automatic disconnect
methods listed below.
For all five disconnect options,
“disabled” means the modem will
not disconnect in the presence of
the conditions specified below
RX (Receive) Space Disconnect
Hayes, V.25 bis, Dumb modes
If this option is enabled, a 1.6-
second continuous space will cause
the modem to disconnect.