http://mirror.lcs.mit.edu/telecom-archives/ The web portal for the Usenet group comp.dcom.telecom. Has postings on a huge variety of telecommunications topics, dating back to August 1981.
http://www.worldcom.com/tools-resources/communications_library/ The MCI Worldcom Communications Library - a pretty good glossary of telecommunications terms and concepts.
http://www.nanpa.com/ The official North American Numbering Plan Administration site, maintained by Neustar. Here you'll find the latest information on new area codes, overlays and splits.
http://www.lincmad.com/index.html Another area code site maintained by a private individual. This one includes interesting related information.
http://www.fcc.gov/ The Federal Communications Commission home page, home to all sorts of important regulatory stuff. Sometimes it can be hard to find specific information; you need to be persistent and creative with the search engine.
http://www.usdoj.gov/crt/ada/adahom1.htm The home page for the Americans with Disabilities Act, maintained by the Department of Justice. Telecommunications-related ADA requirements are spelled out on this site.
http://www.howstuffworks.com/telephone.htm A nice straightforward guide to how your telephone works.
http://abtolls.com/ An excellent source of long distance and wireless phone rate information, created with the individual consumer in mind.
http://www.telephoneart.com/
Need a telephone photo or clip art? You'll probably find it here!
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