I have SCO 2.3.2 and I wanted to shut off the error detection and correction that HDB uses since we are running MNP 5 modems on both ends. Is this possible? How can it be done? What other protocols does SCO HDB have? SCO you out there?? Lance -- Lance Ellinghouse Mark V Systems, Ltd. UUCP: ...!hermix!lance ARPA: ucla-an!hermix!lance at ee.UCLA.EDU