MGCP/MEGACO

(redirected from Megaco)
Also found in: Acronyms, Wikipedia.

MGCP/MEGACO

(Media Gateway Control Protocol/MEdia GAteway COntroller) An IP telephony signaling protocol from the IETF. MGCP was the original protocol, which evolved into MEGACO. Both protocols are designed for implementation in IP phones that are lower cost than SIP or H.323 phones. MGCP/MEGACO requires the use of softswitches for call control and more resembles the telephony model of the circuit-switched PSTN than do SIP and H.323. The softswitch is aware of the entire call throughout its duration (it manages state) and enables operator intervention like the PSTN. MCGP/MEGACO is a combination of the SGCP and IPCD protocols, and many devices that implement MGCP/MEGACO also support SIP and/or H.323.

At the IETF, MGCP evolved into MEGACO, while work on MGCP continued at the International Packet Communications Consortium (www.packetcomm.org). Network Call Signaling (NCS) is CableLab's version of MGCP, and H.248 is the ITU's version.

MGCP/MEGACO uses "terminations" and "contexts." Terminations are points of connection that are assigned an ID by the media gateway and can be permanent or ephemeral (temporary). Contexts are the sessions between these terminations and are managed by the media gateway controller. Like SIP, MEGACO is a text-based protocol, unlike H.248, which is binary based. See H.323 and SIP.
References in periodicals archive ?
Vadalia further explained, "GL's Message Automation & Protocol Simulation (MAPS[TM]) supports MEGACO and MGCP protocols which can simulate MGC to test Media Gateways with various types of calls.
He further added, "GL's MAPS[TM] MEGACO and MAPS[TM]MGCP are also available in High Density version (HD) and are capable of high call intensity (hundreds of calls/sec) and high volume of sustained calls (tens of thousands of simultaneous calls/platform).
Both text based and binary based syntax supported in MEGACO
Supports message templates for each MEGACO message and customization of the field values
8220;MAPS[TM] MEGACO, MAPS[TM] SIP, MAPS[TM] MGCP, and MAPS[TM] SIGTRAN can be combined to perform Media Gateway Controller functions - interacting with multiple Media Gateways and multiple Signaling Gateways and as a SIP server as well.
8220;PacketScan[TM] - an All-IP Analyzer can be configured on a remote system for capturing all-signaling - SIGTRAN, MEGACO, SIP and RTP Traffic in real-time.