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Private Line covers what has occurred, is occurring, and will ocurr in telecommunications. Since communication technology constantly changes, you can expect new content posted regularly.

Consider this site an authoritative resource. Its moderators have successful careers in the telecommunications industry. Utilize the content and send comments. As a site about communicating, conversation is encouraged.

Writers

Thomas Farely

Tom has produced privateline.com since 1995. He is now a freelance technology writer who contributes regularly to the site.

His knowledge of telecommunications has served, most notably, the American Heritage Invention and Technology Magazine and The History Channel.
His interview on Alexander Graham Bell will air on the History Channel the end of 2006.

Ken Schmidt

Ken is a licensed attorney who has worked in the tower industry for seven years. He has managed the development of broadcast towers nationwide and developed and built cell towers.

He has been quoted in newspapers and magazines on issues regarding cell towers and has spoke at industry and non-industry conferences on cell tower related issues.

He is recognized as an expert on cell tower leases and due diligence processes for tower acquisitions.

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January 22, 2004

Posted by Tom Farley & Mark van der Hoek at 01:49 AM

What are the connectors called that join the handset to the telephone?

Q. What are the connectors called that join the handset to the telephone? They're different than the ones that join the telephone to the wall.

A. (From Cowboy Frank:)

Howdy,

It took just a bit of research, but the handset connectors are referred to as 4P4C. RJ11 (the standard phone jack) and RJ45 (the Ethernet jack) are actually construction standards and not the plug shapes themselves. I have never bothered with looking up the standards before, but it would appear they refer to such things as the general shape, use and position of the little lock tab, spacing of contacts, insulation qualifications, acceptable voltage levels and so fourth of the connectors.

This web site is excellent for finding different connectors. It links to a which actually has some technical specs for the 4P4C plugs this company offers:

http://exw.en.alibaba.com/group/0.html

It was actually lucky you asked now instead of 6 months ago. I have just recently bought a crimping tool for handset cords and it had the number on the side which allowed me to look it up :-)

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