External 56K Voice and Data Modem Serial Interface to Host. V.92/V.90. 1 RJ-11 phone jack (to phone line) RS-232 Serial interface to PC Host.Operates in Windows environment.
USB 56K Voice and Data Modem 1 x USB 1.1 port,Data upto 56000bps,V.92/V.90 Std DTMF and pulse dialing, V.42bis & MNP 2-4 data comptrssion & error correc