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CHAPTER 5: Command Mode
This command is for Originate mode only.
Answer mode still accepts MNP or LAP-M.
#L3 Command In the prior commands, the modems use a
two phase process to establish a V.42
connection (detection to establish whether
the remote modem is also error correcting,
and then protocol establishment to deter-
mine parameters and to establish the error
correction connection). If you know that
the other modem is a V.42 error correcting
modem, and you wish to use LAP-M, the
#L3 command disables the detection phase
and goes directly to protocol establishment.
Both modems must have #L3 in effect.
Auto-Reliable Buffering $A
In Auto-Reliable mode, the modem is given four seconds to establish a
Reliable connection. After this four-second period, the modem drops to
Normal mode. Any data which is received during this period is typically
discarded. The $A command can be used to cause the modem to buffer
(save) data that is received during this Auto-Reliable time-out period.
This data will then be output by the modem after the
CONNECT message.
AT$A0 = Discard data received during auto-reliable time period.
AT$A1 = Buffer data received during auto-reliable time period.
The factory default is $A0.
Enable/Disable Auto Reliable Fallback Character $F
In Auto-Reliable mode, the modem is given four seconds to establish a
Reliable connection. If a single CARRIAGE RETURN is received from
the remote modem during this four second period, the Auto-Reliable
modem assumes that the remote modem is not in Reliable mode and
drops to Normal ( non-error correcting) mode. The CARRIAGE
RETURN is the only character which causes the modem to drop to
Normal mode. Any other character will either be buffered or discarded.