What is a Gatekeeper and what does it do?
Client Identification and Registration
H.323 clients have three forms of identification: IP address, user alias, and E.164 address. A Gatekeeper provides a common point of registration for all H.323 clients and tracks each client's identifications.
Clients that are registered to a gatekeeper can connect to each other by dialing any one of the three forms of identification. Clients that are not registered to a gatekeeper can only connect to each other by dialing an IP address.
Gatekeepers also provide:
Bandwidth management - enables H.323 clients to control network usage of video traffic
Admission control - allows H.323 clients to connect to MCUs and Gateways
Error logging - for diagnostics