Quintum Tenor DX Product Manual
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Contents
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P/N 480-0049-00-13 1-12Chapter 1: OverviewH.323 Gatekeeper ServicesThe Tenor DX unit’s built-in H.323 gatekeeper performs IP call routing functions, such as call con-trol and administrative services to another Tenor DX unit, or another H.323 endpoint. The gate-keeper’s functionality complies with the H.323 industry specifications for voice control andmanagement.GatekeeperA Gatekeeper in an H.323 network provides call control services and other services to H.323 end-points (i.e., gateways, terminals, and MCUs). The Tenor DX has a built-in H.323 gatekeeper whichcomplies to the H.323 industry specifications for voice control and management. The gatekeeperperforms call routing functions for calls entering and exiting a site.The Gatekeeper performs IP call routing functions, such as Call Control Signaling and Call Authori-zation for Gateways, IP phones, and H.323 terminals. The Gatekeeper communicates with otherGatekeepers through a Border Element. When using a group of Tenor DX units, you can assign oneunit as the Gatekeeper for the network. We recommend you configure each as its own gatekeeper.Tenor DX supports gatekeeper to gatekeeper communication using the standard LRQ (LocationRequest)/LCF (Location Confirm) messaging scheme.Zone ManagementA zone is a group of H.323 defined endpoints controlled by a Gatekeeper. Endpoints can be gate-ways (i.e., Tenor DX), terminals, and/or multipoint conferencing units (MCUs). Endpoints establishcontrol channels with a gatekeeper for registration, admission, and security. Call routing informationabout the endpoint is sent to the gatekeeper, including: IP address, unit type (gateway, terminal, orMCU) and routing information (such as phone numbers, number patterns, etc.).A collection of zones is an administrative domain. An administrative domain provides call routingservices for its zones through gatekeeper to gatekeeper messages or gatekeeper to border elementmessages (see below for more information).Call RegistrationWhen registration from an H.323 endpoint is complete and a call is originated, the call request issent to the gatekeeper. The call request provides the Gatekeeper with the dialed number and requeststhe routing information. The gatekeeper confirms the dialed number and supplies the endpoint withthe destination IP address. For example, a Tenor DX’s gatekeeper will act as the gatekeeper for thatzone and all of the other endpoints will register with it.Border ElementThe Tenor DX’s gatekeeper uses a border element to gain access to the routing database of theadministrative domain for the purpose of call completion or any other services that involve commu-nications with other endpoints out of the administrative domain. The border element functionality isbuilt into the Tenor DX unit, along with the gateway and gatekeeper. |
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