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TANDBERG Gatekeeper User Guide
Page 103 of 105
22. Glossary
Alias
The name an endpoint uses when registering with the Gatekeeper. Other endpoints can then use this
name to call it.
ARQ, Admission Request
An endpoint RAS request to make or answer a call.
DNS Zone
A subdivision of the DNS namespace. example.com is a DNS zone.
E.164
An ITU standard for structured telephone numbers. Each telephone number consists of a country code,
area code and subscriber number. For example, TANDBERG's European Headquarters' phone number is
+47 67 125125, corresponding to a country code of 47 for Norway, area code of 67 for Lysaker and
finally 125125 to determine which phone line in Lysaker.
External Manager
The remote system that is used to manage endpoints and network infrastructure. The TANDBERG
Management Suite (TMS) is an example of an external manager.
Gatekeeper Zone
A collection of all the endpoints, gateways and MCUs managed by a single gatekeeper.
LRQ, Location Request
A RAS query between Gatekeepers or Border Controllers to determine the location of an endpoint.
RAS, Registration, Admission and Status Protocol
A protocol used between endpoints and a Gatekeeper to register and place calls.
Traversal call
An H.323 call which uses a Border Controller. The Border Controller cooperates with the endpoint or
TANDBERG Gatekeeper to allow communication through a firewall. All signaling and media is routed
through the Border Controller.
Zone
See DNS Zone and Gatekeeper Zone.