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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

Sample from the May 2015 Singing Wires
The Weiss Grabaphone
by Paul Fassbender

A few months ago, a Listserv conversation rekindled my interest in this iconic telephone. It also sent me off on a hunt for information, as the posters on the Listserv were coming up dry using their massive on-line resources and search engines. As you might suspect, my work on the Singing Wires Editorial Board and TCI Library biased my search to TCI resources. To make a short story shorter, in minutes I had located what has to be one of the best ever articles on the early history of Kellogg Grabaphones. It was a six page "Extra," or "Pull-out issue" that was sent with the may ....

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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