AudioCodes Mediant 600 GGWT00385 VoIP Gateway, 1 Fractional Span, SIP Package Mediant 600 VoIP Gateway, 1 Fractional Span, SIP Package including 1 Fractional E1/T1 span (15 voice channels), dual 10/100BaseT Ethernet, and single AC power supply. Control protocol: SIP, including G.711/723.1/726/727/729AB Vocoders ..