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- Mar 19, Southern California
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Telephone Collectors International is an organization of telephone collectors, hobbyists and historians who are helping to preserve the history of the telecommunications industry through the collection of telephones and telephone related material. Our collections represent all aspects of the industry; from the very first wooden prototypes that started the industry to the technological marvels that made the automatic telephone exchange possible.
If any of this interests you, we invite you to join our organization. Look around and see what we have to offer. Thanks for stopping by!
Telephone Collectors International
3805 Spurr Circle
Brea, CA 92823
Sample from the latest Singing Wires
The Spaghetti Bowl of the Switchboard
By Lee Winson
Many of us have seen a switchboard handling the calls of a large organization. The operators' fingers flew over cords and dealt with a "Christmas tree" of many lights. To the lay person, the workings were a mystery. This article will explain the basics of the PBX. In the beginning: As the telephone gained popularity, large organizations added many telephones. With that, there needed to be a way to connect the numerous extensions to outside lines as well as to each other. Soon, the PBX switchboard was born, copying technology from central office switch-boards, but adapted for customer use. PBX calls include three major types: Outside calls to extensions....
For the rest of this story along with many others, access to our Bonus Pages which contain many more photos, online access to all back issues of Singing Wires from 1986 on and many other benefits, join our club. It's easy and it's not expensive.
Sample from the latest Switchers' Quarterly
Fuse Alarm Gong Control
By Jery Petrizze
Not too long ago I decided to get my alarm gong operational instead of just hanging it on the wall. I started looking at the 313C gas tube timing circuit that I had and which would require a 130-volt power supply to operate, and decided there had to be a better way to do this and keep it in the realm of the rest of the 24-volt plant. Applying a ground to the start lead operates the ST relay. The ST relay operated closes a ground path through one of its normally open contacts on through to a set of normally closed contacts on the G relay and then on to operate the gong. The second set of normally open contacts on....
Our Journal for those interested in telephone switching systems, both old and modern. For the rest of this story and online access to all back issues, join our club and add the Switchers' Quarterly option for $5 a year more.
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