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- H.323_Gatekeeper abstract "An H.323 Gatekeeper serves the purpose of Call Admission Control and translation services from E.164 IDs (commonly a phone number) to IP addresses in an H.323 telephony network. Gatekeepers can be combined with a gateway function to proxy H.323 calls and are sometimes referred to as Session Border Controllers. A gatekeeper can also deny access or limit the number of simultaneous connections to prevent network congestion.H.323 endpoints are not required to register with a gatekeeper to be able to place point to point calls, but they are essential for any serious H.323 network to control call prefix routing and link capacities among other functions.A typical H.323 Gatekeeper call flow for a successful call may look like: | | | |Endpoint A Endpoint B 1234 1123 Endpoint A dials 1123 from the system. Endpoint A sends ARQ (Admission Request) to the Gatekeeper. Gatekeeper returns ACF (Admission Confirmation) with IP address of endpoint B. Endpoint A sends Q.931 call setup messages to endpoint B. Endpoint B sends the Gatekeeper an ARQ, asking if it can answer call. Gatekeeper returns an ACF with IP address of endpoint A. Endpoint B answers and sends Q.931 call setup messages to endpoint A. IRR sent to Gatekeeper from both endpoints. Either endpoint disconnects the call by sending a DRQ (Disconnect Request) to the Gatekeeper. Gatekeeper sends a DCF (Disconnect Confirmation) to both endpoints.The gatekeeper allows calls to be placed either:Directly between endpoints (Direct Endpoint Model), orRoute the call signaling through itself (Gatekeeper Routed Model).".
- H.323_Gatekeeper wikiPageExternalLink cc750397.aspx.
- H.323_Gatekeeper wikiPageExternalLink technologies_tech_note09186a00800c5e0d.shtml.
- H.323_Gatekeeper wikiPageExternalLink gatekeepers.
- H.323_Gatekeeper wikiPageID "2071878".
- H.323_Gatekeeper wikiPageRevisionID "577130013".
- H.323_Gatekeeper hasPhotoCollection H.323_Gatekeeper.
- H.323_Gatekeeper subject Category:ITU-T_recommendations.
- H.323_Gatekeeper subject Category:Videotelephony.
- H.323_Gatekeeper comment "An H.323 Gatekeeper serves the purpose of Call Admission Control and translation services from E.164 IDs (commonly a phone number) to IP addresses in an H.323 telephony network. Gatekeepers can be combined with a gateway function to proxy H.323 calls and are sometimes referred to as Session Border Controllers.".
- H.323_Gatekeeper label "Gatekeeper".
- H.323_Gatekeeper label "H.323 Gatekeeper".
- H.323_Gatekeeper label "Контроллер зоны H.323".
- H.323_Gatekeeper sameAs Gatekeeper.
- H.323_Gatekeeper sameAs m.06k65f.
- H.323_Gatekeeper sameAs Q3099253.
- H.323_Gatekeeper sameAs Q3099253.
- H.323_Gatekeeper wasDerivedFrom H.323_Gatekeeper?oldid=577130013.
- H.323_Gatekeeper isPrimaryTopicOf H.323_Gatekeeper.