AT Commands F-7
AT Commands
Determines whether the answering modem set to auto-reliable mode and auto-answer
buffers data from the remote modem during the 3 seconds when it tries to establish a
reliable connection. When the modem receives calls both from modems that support
MNP and from modems that do not, set \C2. This allows the modem to switch to
normal mode as soon as it detects a log-on character (defined by %A) from a non-MNP
caller. This eliminates the 3-second wait. (See the \N command description for more
information about auto-reliable and normal modes.)
For example, use %A to set the auto-reliable fallback character to ASCII 13 (carriage
return). Then set \C2\N3. Non-MNP callers who connect and press
to log on do not
have to wait for the 3-second auto-reliable window to expire before data can pass.
NOTES
When either \C1 or \C2 is set, reliable and normal connections may result
independently of bps rate adjustments. However, when \C0 is set, bps rate adjustments
affect the type of connection as follows:
•
reliable and direct connections may result when bps rate adjust is On (\J1)
•
reliable and normal connections may result when bps rate adjust is Off (\J0)
When falling back to V.23 full duplex connections and either \C1 or \C2 is set, reliable
and normal connections may result independently of the \W command. However,
when \C0 is set, the split serial port speed affects the type of connection as follows:
•
direct connections result when split speed is enabled (\W1)
•
normal connections result when split speed is disabled (\W0)
When either \C0\N3 or \C1\N3 are set, the modem takes approximately 12
seconds to drop to a normal mode V.21 connection.
