VoIP Protocol : SIP v2.0 (RFC 3261)

SIP IP PHONE Call Feature:
Call redialing- call back the last number dialed.
Call Blocking- blocks all incoming call.
Call On-Hold-on hold current call.
Call Transfer- attended & blind transfer.
Call Forwarding- forwarding by demand or duration.
Call Waiting- answer twos simultaneously.
Three parties conference.
Display:
Backlight LCD with 2*16 Dot matrix.
Caller ID support.
Displays simultaneous calls.
Date & Time display.