Telephone Principles, Installation, and Maintenance (2nd Edition)

Author: Wang Jin
Publisher:
Publish Date: 2005-01-01
Features: This book includes the following content: general knowledge of telephones, basic principles of telephone communication; the use, classification, and naming methods of telephones; the structural composition of telephones, performance indicators, functions and fault diagnosis of each component; the basic working principles of dual-tone multi-frequency (DTMF) and audio pulse compatible dialing circuits, calling circuits, ringing circuits, and auxiliary circuits.