1.3.5. Call Termination

To terminate an H.323 call, one of the endpoints, for example, endpoint A hangs up. Endpoint A must send an H.245 CloseLogicalChannel message for each channel it has opened with endpoint B. Accordingly, endpoint B must reply to each of those messages with a CloseLogicalChannelAck message. When all the logical channels are closed, endpoint A sends an H.245 EndSessionCommand, waits until it receives the same message from endpoint B, then closes the channel.

Both endpoint A and endpoint B then send an H.225.0 ReleaseComplete message over the call signalling channel, which closes that channel and ends the call.

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