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Telephone Terminology
FCC Consumer's Glossary of Telecommunication Terms
Glossary of ISDN and Telephone Terminology
TIA's Glossary of Communications Terms - Telecommunications Industry Association's Comprehensive Glossary (over 5800 terms!)
Phone System Buying Guide (.pdf file)
Fundamentals of Telecommunications
FCC Consumer Alerts and Factsheets
An Introduction to Switching, Trunking And Telephone Networks
Understanding Your Telephone Bill
World Telephone Numbering Guide - World Telephone Numbering Guide (WTNG) is intended to bring together various website and other Internet links regarding telephone numbering. Area code lists, text articles, news of phone number changes, number-finding forms are listed.
PLEASE NOTE: Adobe® Acrobat® Reader is necessary to view the PDF spec sheets.