1.4.4. Call Termination

As in the basic H.323 call scenario example, the endpoint that hangs up first needs to close all the channels that were open using the H.245 CloseLogicalChannel message. If the gateway terminates first, it sends an H.245 EndSessionCommand message to endpoint A and waits for the same message from endpoint A. The gateway then closes the H.245 channel.

When all channels between endpoint A and the gateway are closed, each must send a DisengageRequest (DRQ) message to the gatekeeper. This message lets the gatekeeper know that the bandwidth is being released. The gatekeeper sends a DisengageConfirm (DCF) message to both endpoint A and the gateway.

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