Mediant 800B MSBR with 4 FXS, 2 E1/T1 Voice Interfaces, dual-mode ADSL/VDSL over ISDN, 1000Base-T and dual-mode SFP WAN Interfaces, with 5PPM clock Includes Mediant 800B chassis, 4 Giga Ethernet switched LAN ports, and single AC power supply. Supports baseline VoIP, data and security features.