50 lines
2.1 KiB
Plaintext
50 lines
2.1 KiB
Plaintext
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[The World of Cryton: *ELITE*]
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The Numbering Plan
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by
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Terminus
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This file was originally displayed on MetroNet: 'The Intelligent Phreak's
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Choice' @ 301-944-3023 * 24 hours.Other Systems and Sysops may use this file as
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long as they retain these credits intact.Thanks!
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Dial Telephone Service has many prerequisites,but none are more fundamental
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than a numbering plan.This numbering plan establishes the structure within
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which dialing procedures can be applied.It must accomodate:
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o All authorized address devices
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o All users,including those concerned with system testing and maintenance.
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Dialing must follow a prescribed sequence.First there may be a need for one
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or more prefix digits; next, the address must be transmitted; and finally a
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suffix may apply.The basic address format ( used in North America ) consists of
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10 digits with a 3-3-4 subdivision,corresponding to (1) the numbering plan area
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code,(2) the central office code,and (3) the station number. With
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international direct distance dialing (IDDD),standards become a matter of
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global concern.In 1964,a CCITT study established 11 digits as a preferred
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maximum length for international numbers.The following world assignments have
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been made:
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1 Canada,United States
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2 Africa
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3,4 Europe
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5 Central and South America
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6 South Pacific
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7 Soviet Union
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8 North Pacific
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9 Far and Middle East
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0 Spare
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But there is no standardization in the way the dialing is done for inter-
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national connections.Germany,Switzerland,and Italy use '00' to access an
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international line,and '0' to access a national long distance (area code)
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number.Correspondingly,France uses '19' and '16' followed by the inter-
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national or area code.
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[>Downloaded from The World of Cryton<] [414] 462-8978 *ELITE* Phreaker's Club]
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SPECTRE - [714] 795/4017
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