Mulogic UCM-3220 Universal Data Modem for leased line and dial up networks. 100-240VAC (5 watts max) with power adapter for wall. The UCM-3220 is low speed (up to 14.4 kbps) 2-wire or 4-wire full-duplex. Operating temperature of 32 F to 122 F. Extend temperatur available -4 F to 140 F,Supports both synchronous and asynchronous data formats. When used as a leased line modem,the UCM-3220 can use the dial-up network for back-up: If the leased line degrades in quality or fails completely,then the UCM-3220 will restore the connection over the dial-up line. With the dial-up line in use,the leased line connection will be constantly monitored to check when normal leased line operation can be restored. The UCM-3220 has been designed to suit a vast majority of voice-band data-modem applications. It supports all current modulation standards varying from V.21 to V.32bis and can be used on point-to-point and multipoint lines.