<p>This successful title explores how conventional telephone systems operate and how digital electronics replace them. This introduction also presents an overview to state-of-the-art speech circuits, dialing, ringing, and central office electronics.</p>

Understanding Telephone Electronics

Engineering & Transportation

Friend, George E.

Fike, John L.

Bigelow, Stephen J.

Engineering

Newnes

Understanding Data Communications

Bellamy, John C.

Baker, H. Charles

Science & Math

Texas Instruments Learning Center

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Books by Friend, George E.