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TANDBERG Border Controller User Manual
E Glossary
Alias The name an endpoint registers with the Border Controller. Other endpoints can then use
this name to call it.
ARQ, Admission Request An endpoint RAS request to make or answer a call.
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 countr y code of 47 for
Norway, area code of 67 for Lysaker and finally 125125 to determine which phone line in
Lysaker.
LRQ, Location Request A RAS query between Gatekeepers or Border Controllers to determine
the location of an endpoint.
PortRegistration A measure of the number of systems and aliases registered with the Border
Controller. Each endpoint may register one alias of each type (E.164, H323 etc) and
consume 1 PortRegistration in total. If it registers more aliases, e.g. an MCU may register
multiple E.164 aliases, then each additional alias counts as an additional PortRegistration.
It is the number of PortRegistrations which is controlled by the option key.
RAS, Registration, Admission and Status Protocol Protocol used between endpoints and
Border Controller 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
signalling and media is routed through the Border Controller.
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