This AT&T/ Avaya 4601 Gray IP Telephone 700304926 is a basic single line telephone (no display) features 2 programmable feature keys, message waiting indicator and 7 fixed feature buttons. The Avaya 4601 VoIP phone is compatible with Avaya’s Definity and IP Office platform. It connects via the LAN to the Avaya IP Office server * G.711, G.729a/B Voice CODECs. * QoS Options of – UDP Port Selection, DiffServ and 802.1p/B (VLAN). * Single 10/100 BaseT Ethernet port. * Support for Simple Network management Protocol (SNMP). * Microsoft NetMeeting Compatible. * IP Address Assignment – DHCP Client or Statically Configured. * Downloadable firmware for future upgrades. * Wall Mountable with included desk/wall mount stand. * Avaya Grey Color for all markets. Note: The 4600 series phones are compatible with Definity and Avaya IP Office platforms.