R2511-HP MSR Router Series Voice Configuration Guide(V5)

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Opening/closing logical channels
The two endpoints open one or more logical channels between them for transporting media streams.
(The logical channels are specified by IP address plus port number.)
These channels are closed when the communication is over.
Complete release
Finally, either endpoint in communication can release resources by sending a Release Complete
message.
Disconnection
The endpoints each send a Disconnect_Request (DRQ) to their own gatekeepers, which will confirm or
reject the request. The gatekeepers, however, might send a DRQ to the endpoints. In this case, the
endpoints can only confirm the request.
Figure 69 Call setup flow and disconnection flow in which gatekeepers are involved
H.323 gateway configuration task list
Task Remarks
Configuring basic H.323 gateway functions Required.
Configuring registration password Optional.
Enabling security calling Optional.