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13 relations: Class-4 telephone switch, Country code, Ericsson, Internet Protocol, Local access and transport area, Location Routing Number, North American Numbering Plan, Public switched telephone network, Routing in the PSTN, Telcordia Technologies, Telecommunications service provider, Telephone, Telephone numbering plan.
Class-4 telephone switch
A class-4, or tandem, telephone switch is a U.S. telephone company central office telephone exchange used to interconnect local exchange carrier offices for long distance communications in the public switched telephone network.
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Country code
Country codes are short alphabetic or numeric geographical codes (geocodes) developed to represent countries and dependent areas, for use in data processing and communications.
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Ericsson
Ericsson (Telefonaktiebolaget L. M. Ericsson) is a Swedish multinational networking and telecommunications company headquartered in Stockholm.
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Internet Protocol
The Internet Protocol (IP) is the principal communications protocol in the Internet protocol suite for relaying datagrams across network boundaries.
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Local access and transport area
Local access and transport area (LATA) is a term used in U.S. telecommunications regulation.
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Location Routing Number
A Location Routing Number (or LRN) is a unique number that uses the format of a telephone number, but actually represents an entire telephone switch through which multiple telephone numbers are routed.
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North American Numbering Plan
The North American Numbering Plan (NANP) is a telephone numbering plan that encompasses 25 distinct regions in twenty countries primarily in North America, including the Caribbean and the U.S. territories.
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Public switched telephone network
The public switched telephone network (PSTN) is the aggregate of the world's circuit-switched telephone networks that are operated by national, regional, or local telephony operators, providing infrastructure and services for public telecommunication.
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Routing in the PSTN
Routing in the PSTN is the process used to route telephone calls across the public switched telephone network.
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Telcordia Technologies
Telcordia Technologies, Inc., doing business as iconectiv, is an American subsidiary of the Swedish telecommunications company Ericsson.
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Telecommunications service provider
A telecommunications service provider (TSP) is a type of communications service provider that has traditionally provided telephone and similar services.
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Telephone
A telephone, or phone, is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be heard directly.
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Telephone numbering plan
A telephone numbering plan is a type of numbering scheme used in telecommunication to assign telephone numbers to subscriber telephones or other telephony endpoints.
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Redirects here:
LERG, Local Exchange Routing Guide.
References
[1] https://en.wikipedia.org/wiki/Telcordia_LERG_Routing_Guide
