The Avaya 4610SW is a medium-range IP/VoIP fixed phone, designed for professional office environments that require advanced features and an efficient user interface. It stands out for the backlit graphic display, the full-duplex speaker function and the presence of numerous programmable keys (up to 24 with function keys) and dedicated fixed keys for call functions (such as mute, hold, transfer, conference). Specifications Main Techniques Type: Professional IP/VoIP Phone. Network connectivity: 10/100 BaseT Ethernet, 2 ports (PC pass-through). Power supply: PoE native support (Power over Ethernet) 802.3af or 48V external power supply included. Display: Backlit gray scale chart, 5 rows x 29 characters (168x84 points). Keys Function: 12/24 programmable keys (with shift) and 10 fixed function keys (e.g. Speaker, Muto, Transfer). Living: Two-way speaker and Full-Duplex microphone . Supported protocols: H.323. Mounting: It can be mounted on desk or wall.