Appendix A Glossary - Allied Telesis AT-VP504E FXS User Manual

A
Area Code The preliminary digits that a user must dial to be connected to a
AT-VP504E FXS
particular outgoing trunk group or line. In North America, an Area Code
has three (3) digits and is used with a NXX (office code) number. For
example, in the North American telephone number 561-955-1212, the
numbers are defined as follows:
Table 1: North American Numbering Plan
No.
561 Area Code, corresponding to a geographical zone in a non-LNP
(Local Number Portability) network.
955 NXX (office code), which corresponds to a specific area such as
a city region.
1212 Unique number to reach a specific destination.
Outside North America, the Area Code may have any number of digits,
depending on the national telecommunication regulation of the
country. In France, for instance, the numbering terminology is defined
as xZABPQ 12 34, where:
Table 2: France Numbering Plan
No.
x Operator forwarding the call. This prefix can be made of 4 digits.
Z (regional) geographical zone of the number (in France, there are
5 zones). It has two (2) digits.
ABPQ First 4 digits corresponding to a local zone defined by central
offices.
12 34 Unique number to reach a specific destination.
In this context, the Area Code corresponds to the Z portion of the
numbering plan. Since virtually every country has a different dialing
plan nomenclature, it is recommended to identify the equivalent of an
Area Code for the location of your device.
Glossary
Description
Description
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