Presentation on theme: "Gatekeepers Gabe Moulton The Ohio State University Internet2 Commons Site Coordinator Training March 22, 2004 Indianapolis, Indiana."— Presentation transcript:
Gatekeepers Gabe Moulton The Ohio State University Moulton.firstname.lastname@example.org Internet2 Commons Site Coordinator Training March 22, 2004 Indianapolis, Indiana
2 GateKeeper MCU H.323 Clients INTERNET H.323 Videoconferencing Web Browser Real Video H.323 H.320 Gateway ISDN POT’s line Telephone
3 Gatekeepers Provide: Admission Control Call Authorization Address Translations Bandwidth Management Zone Management Call Signal Routing Management Functions
4 H.323 Gatekeeper Necessary for operations, but not mandatory in H.323 Required Functions Address translation Call admission/authorization Some bandwidth management
5 Typical Gatekeeper Components Gatekeeper Core Functionality Web Server Management SNMP Services
6 H.323 Zone Definition A single gatekeeper and all of the end points (clients, MCUs, and gateways) that register with the gatekeeper. Typically is a community E.g., University or organization
7 Basic Operation Endpoints register with gatekeeper Endpoint asks gatekeeper for permission to place call to another endpoint Endpoint signals call with other endpoint Endpoints exchange media directly Endpoints disconnect, notify gatekeeper
8 Gatekeeper Functionality Services: Gives access to multipoint conferences and gateways Neighbor Gatekeepers: Provides inter-zone communication Network Topology: Allow administrator to employ traffic shaping Endpoints: Live list of registered users Call Control: Live list of active calls
13 Gatekeeper Alternatives Standalone Gatekeeper (e.g., Radvision ECS) System Blade (e.g., Radvision ECS on a blade of a ViaIP) Embedded in an Endpoint (e.g., A gatekeeper embedded in a Radvision OnLAN MCU or gateway) Backup Gatekeeper (e.g., Radvision Alternate Gatekeeper)
14 Specific Example Radvision embedded gatekeeper Runs in a Radvision MCU or gateway. PC configuration software. Provides parameter setting, remote monitoring and user definition and control. Built-in telnet server. Provides optional monitoring and remote control. 100 simultaneous registrants and 30 simultaneous calls. Free !
15 Questions? Gabe Moulton Technology Engineer The Ohio State University 614 292 8443
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