Ositech comm Trumpcard Data/Fax Modem - Manual (Page 61)

User’s Guide and Reference 4 - 29
Modem Command Reference
\Nn — Operation Mode Control
Parameters 0, 1, 2, 3, 4, or 5
Default 3
Selects the operating mode the modem uses while connected (see &Qn
command).
Examples
AT\N0 Selects Normal (speed buffering) mode. This option
takes effect at physical connection time.
AT\N1 Same as AT\N0.
AT\N2 Selects reliable link mode. This defines the modem-
to-modem connection to require error correction
connection. If an attempt to establish the reliable
link fails, the modem disconnects.
AT\N3 Selects auto-reliable link mode. The modem will
attempt an error-correction connection but will
fallback to Normal mode if unable to establish an
error correcting connection. This command takes
effect at physical connection time only.
AT\N4 Selects LAPM error-correction mode. The modem
will attempt a LAPM error-correction connection. If
the attempt fails, the modem disconnects.
AT\N5 Selects MNP error-correction mode. The modem will
attempt a MNP error-correction connection. If the
attempt fails, the modem disconnects.
%Cn — Compression Control
Parameters: 0, 1, 2, or 3
Default 3
Enables or disables data compression negotiation. The modem can only
perform data compression on an error-correcting link.
Examples
AT%C0 Disables data compression
AT%C1 Enables MNP 5 data compression
AT%C2 Enables V.42bis data compression
AT%C3 Enables both MNP 5 and V.42bis data compression