D-Link DPH-125MS VoiceCenter IP Phone for Microsoft Response Point. Management protocols: IETF SIP (RFC3261). Phonebook capacity: 200 entries. Voice codecs: G.729a/b, Supported network protocols: IP, DHCP, PPPoE. Display: LCD. Cabling technology: 10/100BaseT, Networking standards: DHCP, HTTP, ICMP, IP, RTCP, RTP