- Gatekeepers are optional devices that are responsible for admission control, zone management, and E.164 address translation
- The gatekeeper hardware and software requirements depend on the Cisco IOS version and feature set.
- Signaling between a gateway and a gatekeeper is done through H.225 RAS.
- Zone prefixes indicate the destination zone for a call.
- Technology prefixes are used by gatekeepers to be more flexible in call routing. Difault technology prefixes are used as a gateway of last resort.
- A gatekeeper has a logical process for call routing that depends on techology prefix and zone prefix matching.
- Directory gatekeepers can intelligently forward LRQs to appropriate gatekeepers. These directory gatekeepers are used for eliminating the requirement for fully meshed gatekeeper networks.
- GKTMP provides an interface for call control of a gatekeeper.
- A single gatekeeper can manage multiple local and remote zones.
PR