Public switched telephone network

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History

Telephone call Signaling Telephone exchange Trunks Pulse dialing

27 related topics

Technology

Trunks Two-wire circuits Local loop Calling party Called party

28 related topics

Overview

Telephony Infrastructure Telephone lines Fiber-optic cables Microwave transmission

23 related topics

Operators

Network operators Bell Telephone Company Public utility General Post Office Nationalized company

6 related topics

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Map overview Semantic statistics

Nodes96

Edges95

Triples12

Avg. degree1.98

Density0.020833

Components1

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Important terminology Word statistics

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Important terminology

telephone networks pstn network digital telephony also exchange operators exchanges services local analog call standards internet service public interconnected global

Entity relationships Subject–Predicate–Object triples

Subject	Predicate	Object	Confidence	Src
DSL	instance of	digital technologies	0.80	text
ISDN	instance of	digital technologies	0.80	text
FTTx	instance of	digital technologies	0.80	text
and cable modems were progressively deployed in this portion of the network	instance of	digital technologies	0.80	text
primarily to provide high-speed Internet access.As of 2023	instance of	digital technologies	0.80	text
operators worldwide are in the process of retiring support for both last-mile analog telephony	instance of	digital technologies	0.80	text
and transitioning voice service to Voice over IP via Internet access delivered either via DSL	instance of	digital technologies	0.80	text
cable modems or fiber-to-the-premises	instance of	digital technologies	0.80	text
eliminating the expense	instance of	digital technologies	0.80	text
complexity of running two separate technology infrastructures for PSTN	instance of	digital technologies	0.80	text
Internet access.Several large private telephone networks are not linked to the PSTN	instance of	digital technologies	0.80	text
usually for military purposes	instance of	digital technologies	0.80	text

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Overview

History

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Technology

Regulation

Technology retirement

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