1 / 15

Gatekeepers

Gatekeepers. Gabe Moulton The Ohio State University Moulton.13@osu.edu Seventh Annual Digital Video Conference March 31, 2005 Atlanta, Georgia. Gatekeepers Provide:. Admission Control Call Authorization Address Translations Bandwidth Management Zone Management Call Signal Routing

bradortega
Télécharger la présentation

Gatekeepers

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Gatekeepers Gabe Moulton The Ohio State University Moulton.13@osu.edu Seventh Annual Digital Video Conference March 31, 2005 Atlanta, Georgia

  2. Gatekeepers Provide: • Admission Control • Call Authorization • Address Translations • Bandwidth Management • Zone Management • Call Signal Routing • Management Functions

  3. H.323 Gatekeeper • Necessary for operations, but not mandatory in H.323 • Required Functions • Address translation • Call admission/authorization • Some bandwidth management

  4. Typical Gatekeeper Components • Gatekeeper Core Functionality • Web Server Management • SNMP Services

  5. 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

  6. 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

  7. 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

  8. Registrants

  9. Client Authorization • Open Gatekeepers • anyone can register • Predefined Endpoints • LDAP Authenticated Endpoints

  10. Services • Multipoint Conferences (most prominent use) • Gateways to other services • Defined by a dial string • Commons conferences use 3 digits • EG 001189700 accesses a 384K conference • Conferences differentiate by pins • Commons uses 4 digits • EG 0011897001234 access my 384K conference

  11. Defined Services

  12. 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)

  13. Gatekeeper Alternatives • Other Gatekeepers: • Polycom PathNavigator • Cisco (Radvision code running on Cisco IOS) • VCON Media Exchange Manager, MXM • GNU Gatekeeper (Based on open H.323)

  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

More Related