6 SIP accounts. LCD screen 320x160. Hands-free speaker full duplex. HD sound. SMS RJ11 headphone jack. 2 Ethernet ports. 4 navigation keys. 12 function keys with 2 leds for messaging. 16 programmable keys (10 BLF / BLA). Mute key Keypad lock Volume Settings. Downloadable calendar (XML, LDAP, up to 300 contacts) and ring tones. Customization via XML of the screen. Call waiting, diversion, transfer, call rejection. Voicemail, speed dials, Flash, volume adjustment, ringer selection. Multi language, with support for Spanish. Intercom functions. Wall mounting possible. Supports Busy Lamp Field (BLF) and Shared Bridged Line Appearance (BLA) keys. PoE, or optional power supply.