3Com DIGITAL MODEM manual Normal speed buffered, Mode to be negotiated in a Direct, Reliable link

B-6 APPENDIX B: AT COMMANDS, REGISTERS, AND RESULT CODES

Table B-2 AT Command Set Summary for the Internal Analog Modem (continued)

Command	Function (Example)	Description
\N	Set preferred error-correcting	0 — Normal speed buffered
	mode to be negotiated in a	1	— Direct
	subsequent data connection
		2	— Reliable link
		3	— Auto reliable
		4	— Force LAPM
		5	— Force MNP
-K	MNP extended services	Enables/disables conversion of a V.42
		LAPM connection to an MNP 10
		connection.
		0	— Disable
		1	— Enable
		2	— Enable; inhibits MNP extended
		services initiation during V.42 LAPM
		answer mode detection phase
-Q	MNP 10 fallback to 2400 bps	Enables or disables fallback from MNP 10
	(V.22bis)/1200 (V.22)	to V.22bis/V.22.
		0	— Disable
		1	— Enable (default)
*H	Link negotiation speed	Controls the connection speed for link
		negotiations before upshift occurs
		between two MNP Class 10 modems.
		0	— Highest rate (default)
		1	— 1200 bps
		2	— 4800 bps
+F	All fax commands (AT+fax sub-	All fax commands
	command)