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Telephone Numbering Plan
Telephone Numbering Plan

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!!! Overview
[{$pagename}] is a type of numbering scheme used in [telecommunication] to assign [Phone Numbers] to subscriber telephones or other telephony endpoints.[{$pagename}] defines the pattern of [digits] for a [country] phone number. [{$pagename}] defines the __specific__ components of phone numbers, display format styles, and codes.
[Phone Numbers] are the addresses of participants in a [Telecommunications] [network], reachable by a system of destination code routing.
[{$pagename}]s are defined in each of administrative regions of the [Public Switched Telephone Network] ([PSTN]) and they are also present in private telephone networks. For public number systems, geographic location plays a role in the sequence of numbers assigned to each telephone subscriber.
[{$pagename}]s may follow a variety of design strategies which have often arisen from the historical evolution of individual telephone networks and local requirements. A broad division is commonly recognized, distinguishing open numbering plans and closed numbering plans. Many numbering plans subdivide their territory of service into geographic regions designated by a prefix, often called area code, which is a set of digits forming the most-significant part of the dialing sequence to reach a telephone subscriber.
The [International Telecommunication Union] ([ITU]) has established a comprehensive numbering plan, designated [E.164], for uniform interoperability of the networks of its member state or regional administrations. It is an open numbering plan, however, imposing a maximum length of 15 digits to [Phone Numbers]. The [E.164] standard defines a [Country Calling Code] for each state or region which is prefixed to each national numbering plan telephone number for international destination routing.
Private numbering plans exist in telephone networks that are privately operated in an enterprise or organizational campus. Such systems may be supported by a [Private Branch Exchange] ([PBX]) which controls internal communications between telephone extensions.[{$pagename}]s also decide on the routing of [Signalling System No. 7] ([SS7]) signaling messages as part of the Global Title. In [Public Land Mobile Networks], the [E.212] numbering plan is used for Subscriber identities, e.g., stored in the [GSM] [SIM], while [E.214] is used for routing database queries across [PSTN] networks. In general, the structure of telephone numbers issued within a national [{$pagename}] follows both the international formats and the national standards. Within the international system administered by the [ITU] in [E.164], each national plan has a unique [Number Plan Area].
!! [{$pagename}] Components
[{$pagename}] generally consists of the following Components:
The E.164 recommendation provides the telephone number structure and functionality for three categories of telephone numbers used in international public telecommunication:
* [Country Calling Code]
* [National Destination Code] ([Area Code])
* [Subscriber Number]
!! [International Prefix]
!! More Information
There might be more information for this subject on one of the following:
[{ReferringPagesPlugin before='*' after='\n' }]
This page (revision-1) was last changed on 29-Nov-2024 16:16 by UnknownAuthorTop