Term
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Definition
| pre call control between endpoints, and gatekeepers. Handles registration, admissions, bandwidth changes, status, disengage procedures... |
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Term
RAS Signalling > Auto-Discovery
GRQ
GCF
GRJ |
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Definition
Gatekeeper:
Request
Confirm
Reject |
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Term
RAS Signalling > Registration
RRQ
RCF
RRJ
URQ
UCF
URJ |
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Definition
Registration Request
Registration Confirm
Registration Reject
Unregister Request
Unregister Confirm
Unregister Reject |
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Term
H.323 ports:
discover
register and status
Reliable call control |
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Definition
1718 - UDP
1719 - UDP
1720 - TCP - H.225/w Q.931/Q.932 |
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Term
| H.245 - end-to-end control messages, transmission of audio, video, data |
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Definition
TCP
Capability Exchange
opening and closing of channels
function determination
codec selection |
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