TELEPHONE FEATURES Display: large screen 7 rows x 29 characters Programmable function buttons: 8 line/function without paper with 3 pages (total of 24 programmable buttons) Fixed function buttons: Expected, Conference, Transfers, Disables, Compounds, Audio Disables, Volume on/off, Speaker, Headphones, Message, Exit and Menu Module Expansion buttons: Yes, it supports the Avaya EU24 button expansion module (700345192, 700381817) for additional 24 programmable line/function buttons. You need a power supply 1151C1 or 1151D1. Context Softkey : 4 Vivavoce: Includes 2-way speaker/full duplex Wall mountable: Yes, the included desk support can be converted for wall mounting Headphone holder: Yes Storage: The local directory offers 104 entries, including fast calling numbers. The call log offers 100 entries (lost calls, incoming, outgoing calls; includes call duration) Waiting message indicator: Yes Adjustable tilt display: no Global design: uses icon buttons and supports 8 different languages (English, German, French, Spanish, Italian, Dutch, Portuguese and katakana)