MEGACO
Many network engineers consider MEGACO to be superior to MGCP. (Source: Network+ Guide to Networks, page 552)
Media Gateway Control Protocol (MGCP) controls media gateways on IP networks that connect to the Public Switched Telephone Network. MGCP is, in essence, a master/slave protocol.
RTP (Real-time Transport Protocol): Carries the voice and video traffic and doesn't do any signalling, signaling is done by H.323, MGCP or SIP protocols. Its uses UDP to carry the payload hence its not actually a protocol Where RTCP (Real-time Transport Control Protocol) Manages the quality of RTP such as QOS Identification, Session size estimation and scaling and basically works with RTP side by side.
Michael J. Cavanaugh is a double CCIE, and has been in the computer industry since 1981. Certifications ===================== Specialized in Voice over IP (VoIP), IP Telephony, IP Video and Unified Communications design, implementation and troubleshooting, using industry standard and proprietary protocols (SIP, SCCP, MGCP, H.323, H.261, H.263, H.264). Skilled with the following Cisco UC products: Communications Manager, Communications Manager Express, Unity Unified Messaging / Voice Messaging, Unity Connection, Unity Express, UCCx, Presence, Emergency Responder and MeetingPlace Enterprise / Express. Hope this is the right Michael you're looking for.