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April Singing Wires and Switchers' Quarterly are now available in the members login area.

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
714-528-3561

Sample from the April 2015 Singing Wires
The Three Sisters
by Gary Goff


Once upon a time there were three western girls whose mother, Ma Bell, was always concerned how her daughters appeared in public. One liked to appear with early antique parts while another preferred to wear the latest styles. One wore platform shoes so she would stand taller and where she could make notes, while another preferred a very rare dial broach and flashy green glasses. Both of these older girls marketed special equipment to help telephone customers prevent unauthorized use of their telephones. The youngest of the girls, a bit more old fashioned than older siblings, marketed a similar product with a flashy label that was patented several....

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 April 2015 Switchers' Quarterly
The 1AESS Signal Distributor
By Chris Mattingly


The 1AESS, being an analog switch, has thousands of trunk circuits, all with relays that need to be operated and released during use. The device that does this is the Signal Distributor. I have covered this in a previous article, but I would like to go more in-depth as to how it works, particularly the relays that steer the pulses. Each Signal Distributor has 1,024 output points that can be wired to relays to operate and release them. Orders are clocked off the bus by solid state circuits. These circuits (flipflops) store the order, and the outputs drive mercury relays which drive wire spring relays that steer the pulses. Some mercury relays....

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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