Aastra 53i IP Phone

Features: Up to 9 call appearance lines. Shared Call and Bridged Line Appearances. Multi-proxy support. Distinctive ringing, priority alerting. XML browser. Personal directory. Call forward/Call transfer/Call waiting/Callers log. Caller and calling line information. Local 3 way conference. Intercom with auto-answer. Redial list. Do Not Disturb. Live dial pad or pre-dial support. Digium’s Asterisk Business Edition - supports Busy Lamp Field (BLF), Intercom. BroadSoft’s BroadWorks enhanced SIP - supports Shared Call Appearances, Busy Lamp Field (BLF), CommPilot Call Manager. Nortel’s MCS 5100/5200 SIP supports Conferencing, Voicemail, and NAT Traversal.