Specifications

AT-VP504E FXS 129
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Glossary
10 BaseT An Ethernet local area network which works on twisted pair wiring.
100 BaseT A newer version of Ethernet that operates at 10 times the speed of a
10 BaseT Ethernet.
A-Law The ITU-T companding standard used in the conversion between
analog and digital signals in PCM (Pulse Code Modulation) systems.
A-law is used primarily in European telephone networks and contrasts
with the North American mu (µ)-law standard. See also
mu (µ)-law .
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 69: 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 70: 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.
ABPQ First 4 digits corresponding to a local zone defined by central
offices.