Hi there I came across a single chip modem and thought you may be interested in it although it can only run up to 1200. EF7910PL by SGS-Thomson "A single chip modem capable of receiving and transmitting in full duplex, half duplex or simplex at 1200, 600, 300 or 75 bauds at the frequencies of Bell and CCITT standards. The chip performs modulation, demodulation and performs all the necessary filtering with its own internal digital filters. The device runs from a single 2.4576MHz crystal and has all the essential terminal control signals to RS232 / V24 as well as auto answer." From the Maplin catalogue. Chow for now Gavin vulcan@ihug.co.nz - - - - - - - - - - - - - -