* 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 * Caller and calling line information * Callers log * 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), Bridged Line Appearances (BLA), 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 * Sylantro’s SIP – supports Bridged Line Appearances (BLA), ComСierge, Call Park/Pickup, Conference