roduct type : data fax voice modem speed : 56kbps (download) auto-negotiates v.90 & v.92 48kbps (upload) pcm upstream error correction : itu-t v.42, mnp 2-4 data compression : itu-t v.44, v.42bis,mnp 5 max throughput 230,400bps fax send/receive speeds : 14,000bps inc : mymodem v.92 data/fax/voice modem, fax/data/voice communications sw, std tel conn cable, serial conn cable, power pack sys req : pentium proc 300mhz+ 32/64 mb ram (depending on os),120 mb free hdd space, cd rom drive, socket for tel line conn os : win 98, 2000, me , xp * faster connection with ultra connect technology * 2-wire leased line for point to point communications over unpowered lines * full duplex,sync transfer mode,digital line and brown-out protection * voice and fax answering machine, caller number display & distinctive ring supp * flash upgradeable to keep modem up to date within the latest v.92 std