Ositech comm Trumpcard Data/Fax Modem manual Nn Operation Mode Control, Cn Compression Control

Modem Command Reference

\Nn — Operation Mode Control

Parameters 0, 1, 2, 3, 4, or 5

Default3

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

User’s Guide and Reference 4 - 29