A Gatekeeper is a very useful, but optional, component of an H.323enabled network. The gatekeeper provides address translation and controls access to the network resources for H.323 terminals, gateways and MCU's.

An endpoint does register itself at a gatekeeper. All H.323 endpoints registered to a single gatekeeper build an H.323 zone. A gatekeeper provides several services to all endpoints in its zone. These services include:

There are several gatekeepers on the market, including proprietary hardware gatekeepers from Tandberg, Polycom, Cisco, and others, and software based gatekeepers such as GNUGK and DUAL Gatekeeper.

Gatekeeper Provides -