Stack Trace from the 1950s Punches Again

This repair/tutorial video by the telephone Connections Museum of Seattle features an amazing piece of electro-mechanical technology from the 1950s — the 5XB trouble recorder. Museum volunteer Sarah the “Switch Witch” has …read more Continue reading Stack Trace from the 1950s Punches Again

The Simplest Electro-Mechanical Telephone Exchange That Actually Works

Several relays and switches mounted on a metal frame

While rarely seen by users, the technology behind telephone exchanges is actually quite interesting. In the first hundred or so years of their existence they evolved from manually-operated switchboards to …read more Continue reading The Simplest Electro-Mechanical Telephone Exchange That Actually Works

Rotary Phones and the Birth of a Network

I can’t help but wonder how long it will be before the movie title  “Dial M for Murder” becomes mysterious to most of the population. After all, who has seen a dial phone lately? Sure, there are a few retro phones, but they aren’t in widespread use. It may not be murder, but it turns out that the dial telephone has its roots in death — or at least the business of death. But to understand why that’s true, you need to go back to the early days of the telephone.

Did you ever make a tin can phone with …read more

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