MNP Error Control &Q8
The MNP error control feature lets the modem attempt to negotiate an
MNP error-control link upon connection. The current setting in S46 bit 1
determines whether MNP(TM) 2-4 or MNP5 is negotiated. If S46 bit 1 is set
to 1, MNP5 is preferred. If an MNP error-control protocol is not established,
the modem falls-back according to the current setting in S36.
If S36 bit 0 is 0 the modem hangs-up. If S36 bit 0 is 1 the modem connects
according to S36 bit 1. If S36 bit 1 is 0 the modem connects in Direct Async
mode. If S36 bit 1 is 1 the modem connects in Buffered Async mode. The settings
in S48 and S46 (except bit 1) are ignored. If fallback to Buffered Async
mode occurs, all data received during protocol negotiations are present
in the received data buffer.
The &Kn command setting determines the type of local flow-control while
in error-control or buffered modes.
The diagram in the Error-control Mode - &Q5
section depicts modem operation in this mode.