Allied Telesis AT-VP504E FXS (H.323) - Manual (Page 19)

AT-VP504E FXS 15
A p p e n d i x A
Glossary
A
Area Code
The preliminary digits that a user must dial to be connected to a
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:
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: North American Numbering Plan
No. Description
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.
Table 3: France Numbering Plan
No. Description
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.
ABP
Q First 4 digits corresponding to a local zone defined by central
offices.
12 34 Unique number to reach a specific destination.