3Com DIGITAL MODEM User Manual page 50

B-6 A
PPENDIX
Table B-2 AT Command Set Summary for the Internal Analog Modem (continued)
Command Function (Example)
\N Set preferred error-correcting
mode to be negotiated in a
subsequent data connection
-K MNP extended services
-Q MNP 10 fallback to 2400 bps
(V.22bis)/1200 (V.22)
*H Link negotiation speed
+F All fax commands (AT+fax sub-
command)
B: AT C , R
OMMANDS
, R
EGISTERS AND ESULT
Description
0 — Normal speed buffered
1 — Direct
2 — Reliable link
3 — Auto reliable
4 — Force LAPM
5 — Force MNP
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
Enables or disables fallback from MNP 10
to V.22bis/V.22.
0 — Disable
1 — Enable (default)
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
All fax commands
C
ODES