Motorola SBV5122 SURFboard&reg; Digital Voice Modem Up to two lines (RJ-11) of full-featured telephone service Automatic fax modem processing Configured to meet multiple telco market standards Support for CLASS services (caller ID, call waiting, three-way calling, etc.)  Support for G.711 and other low-rate vocoders  Network Call Signaling (NCS) and Session Initiation Protocol (SIP) support ETSI harmonized impedance, 600