Description
Condition - Very Good
The item shows wear from consistent use, but it remains in good condition and functions properly. Item may arrive with damaged packaging or be repackaged. It may be marked, have identifying markings on it, or have minor cosmetic damage. It may also be missing some parts/accessories or bundled items.
Introduction to Telecommunications: Analog Voice and Data Systems
Voice, data, and everything internet started with a basic telephone voice circuit called a Plain Old Telephone System - POTS. Development of data as we know it didn't begin in commercial use until the early 1970s. This manual is designed to show how the basic POTS circuit works; how the network can detect signaling or call control such as on-hook, off-hook-ringing and busy signals and how to properly test an analog circuit. Much of this technology has now been replaced with Internet Protocol (IP), and Ethernet as the connection standard. However, many analog voice and data circuits remain in service and this manual will give the student a clear understanding of how analog voice and data works using a single 4 KHz channel; how to install and maintain them and how to troubleshoot analog networks.
