What distinguishes the old telephone networks and exchanges from their digital equivalents is the use of analogue technology.

EBK ELECTRICAL WIRING RESIDENTIAL
19th Edition
ISBN:9781337516549
Author:Simmons
Publisher:Simmons
Chapter25: Television, Telephone, And Low-voltage Signal Systems
Section25.2: Telephone System
Problem 3R: Sketch the symbol for a telephone outlet.
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What distinguishes the old telephone networks and exchanges from their digital equivalents is the use of analogue technology.

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