... ¨ One PSTN line port VoIP Protocol Stacks¨ SIP/MGCP/H.323 signaling stacks¨ RTP/RTCP/SDP media processing stacks Management¨ ... web and ManageCenter¨ Plug and play (PnP), identical to legacy phones on placing and answering a call¨ Voice quality almost the ... supported¨ SIP: RFC3261~RFC3266¨ MGCP: RFC3435 (Compatible RFC2705),¨ H.323: H.225,H.235,H.245,Q.931¨ RTP/RTCP: RFC3550(Compatible RFC1889/RFC1990 ...