User Manual

Appendix A
Modem AT Commands
29
Xircom Inc. Mini PCI User’s Guide
\Gn Modem Port Flow Control
The AT\Gn command determines whether XON/XOFF flow control will be used.
\G0
Returns OK for compatibility (default).
\G1 Not supported; returns ERROR.
\Jn Adjust BPS Rate Control
\J0
Turn off feature (default).
\J1 Turn on feature.
\Kn Break Control
The AT\Kn command determines how the modem processes a Break signal received from the
local DTE during a connection (online).
\K5
Modem sends Break to remote modem in sequence with transmitted data,
nondestructive/nonexpedited (default).
\Nn Error Mode Control Selection
The AT\Nn command sets the type of error correction supported by the modem when sending or
receiving data.
\N0 Buffered mode. No error control (same as &Q6).
\N1 Buffered mode (same as \N0).
\N2 LAPM, MNP or disconnect mode. This is also known as reliable mode.
\N3
LAPM, MNP, or buffered (default). The modem attempts to connect in LAPM
error control mode. If this fails, the modem attempts to connect in MNP mode. If
this fails, the modem connects in buffered mode and continues operation. This is
also known as V.42 auto-reliable mode (same as &Q5).
\N4
LAPM or disconnect. The modem attempts to connect in LAPM error control
mode. If this fails, the call will be disconnected.
\N5
MNP or disconnect mode. The modem attempts to connect using MNP 2-4 error
control procedures. If this fails, the modem disconnects. This is also known as
MNP reliable mode.
\Qn Local Flow Control Selection
The AT\Qn command sets the type of flow control used on the serial port to adjust for
differences in modem port speed.
\Q0 Disables flow control (same as &K0).
\Q1 Sets flow control to XON/XOFF (same as &K4).
\Q3
RTS/CTS to DTE (default; same as &K3).