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Chapter 1: Overview
Admissions Control.
All H.323 endpoints must register and request permission to enter the gate-
keeper’s zone; the gatekeeper will confirm or deny access to the network.
The gatekeeper authorizes
network access and protects the integrity of the network using Admissions Request (ARQ), Admis-
sions Confirmation (ACF) and Admissions Reject (ARJ) messages.