What are the protocol used between 1. Media Gateway Control and Media Gateway 2. Signaling gateway and Media Gateway Control
Between MG and MGC you have Megaco, MGCP and H.248 Between SG and MGC you have SIGTRAN protocols i.e. M3UA/SUA/M2UA/M2PA (only any one of these)
Following image should help (Megaco is not there in the image)
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There are two termination
1) Physical 2) Ephemeral
For simple call. So How many termination in CONTEXT for conference call ??