AudioCodes MP204B/4S/SIP, Blue, Plastic, LAN, Power, Status, WAN, CNG, G.168, G.711, G.723.1, G.726, G.727, G.729A, G.729B, VAD, IPv4, TCP/UDP, ICMP, ARP, RTP, RTCP, PPPoE, PPTP, L2TP, DNS, Dynamic DNS, STUN, DHCP..., SIP(RFC 3261) AudioCodes MP204B/4S/SIP. Product color: Blue, Enclosure material: Plastic, LED indicators: LAN, Power, Status, WAN. Voice codecs: CNG, G.168, G.711, G.723.1, G.726, G.727, G.729A, G.729B, VAD. Supported network protocols: IPv4, TCP/UDP, ICMP, ARP, RTP, RTCP, PPPoE, PPTP, L2TP, DNS, Dynamic DNS, STUN, DHCP..., VoIP protocols: SIP(RFC 3261), Supported protocols: SIP. Ethernet LAN data rates: 10,100,1000 Mbit/s, Networking standards: IEEE 802.1Q, IEEE 802.1p, Modulation: DTMF. WAN connection: Ethernet (RJ-45)