Cabletron Systems CSMIM-T1 Installation Manual page 131

Setting this command to 1 or 2 restricts the modem to using either
MNP 5 Data Compression or V.42bis compression, respectively,
or else a non-compression connection results.
If the remote modem does not support data compression or has it
disabled, the modem can establish a connection without data
compression, regardless of the modem's %C setting.
We recommend disabling bps rate adjust ( \ J0) for the most
NOTES
throughput.
With AT \ J1 set, when the modem establishes a reliable
connection at speeds between 4,800 and 16,800 bps, the serial
port adjusts to 9,600 bps. If the connection speed is 19,200 or
above, the serial port adjusts to 19,200 bps.
&C n
Serial-Port DCD Control
&C0 DCD always On.
&C1 DCD follows the state of the carrier from the remote system; DCD
turns On after the connect message.
&C2 DCD On except momentarily at disconnect.
Controls the Data Carrier Detect (DCD) signal on the serial port.
Use this command if your computer requires CD to be Off at
certain times. See also the \D command description.
The &C and \ D settings are ignored while connected in V.23
NOTE
half-duplex direct mode (%F3) or ITU-T V.13 (&R2).
Hardware flow control overrides the &C and \ D settings for
CTS operation. (See also \Q.)
@C n CTS, DSR, and DCD Connect Message Control
@C0 CTS, DSR, and DCD go On after the connect message is sent.
@C1 CTS, DSR, and DCD go On before the connect message is sent.
Specifies whether CTS, DSR, and DCD go On before or after a
connect message. Use this command with :T14.
CSMIM-T1 Hardware Installation Guide
Commands
7-5