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Landline service is typically provided through the outside plant of a telephone company's central office, or wire center. The outside plant comprises tiers of cabling between distribution points in the exchange area, so that a single pair of copper wire, or an optical fiber, reaches each subscriber location, such as a home or office, at the network interface.
All telephone numbers in Djibouti have eight digits. Fixed line numbers start with 21 or 27, then a fixed line locality code, followed by four digits. Mobile numbers start with 77, then a mobile line locality code, followed by four digits. With the country code of Djibouti (253), the international format is "+253 XX YY ZZZZ".
Originally a network of fixed-line analog telephone systems, the PSTN is now predominantly digital in its core network and includes terrestrial cellular, satellite, and landline systems. These interconnected networks enable global communication, allowing calls to be made to and from nearly any telephone worldwide. [1]
Modern telephones exist in various forms and are implemented through different systems, including fixed-line, cellular, satellite, and Internet-based devices, all of which are integrated into the public switched telephone network (PSTN). This interconnected system allows any telephone, regardless of its underlying technology or geographic ...
37.2 Fixed-line operators ($1 to $10 billion annual revenues) 37.3 Fixed line operators ($100 million to $1 billion annual revenues) 37.4 Fixed line operators (less than $100 million annual revenues)
Fixed telephone lines per 100 inhabitants, 1997–2007. Cross section of telephone cable of 1,800 twisted pairs, 1922. A newer telephone cable used to carry telephone lines from several customers. A telephone line or telephone circuit (or just line or circuit industrywide) is a single-user circuit on a telephone communication system. [1]
Telephone density or teledensity is the number of telephone connections for every hundred individuals living within an area. It varies widely across the nations and also between urban and rural areas within a country. Telephone density has significant correlation with the per capita GDP of the area. [1]
Local number portability (LNP) for fixed lines, and full mobile number portability (FMNP) for mobile phone lines, refers to the ability of a "customer of record" of an existing fixed-line or mobile telephone number assigned by a local exchange carrier (LEC) to reassign the number to another carrier ("service provider portability"), move it to another location ("geographic portability"), or ...
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