A Complete Exchange From Scratch For Your Rotary Dial Phones

Such has been the success of the mobile phone that in many places they have removed the need for wired connections, for example where this is being written the old copper connection can only be mad…

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 voluntee…

How To Build Your Own Analog Phone Network

Analog phones may be nearly obsolete today, but having served humanity for well over a century they’re quite likely to pop up in drawers or attics now and then. If you’ve got a few of t…

The Simplest Electro-Mechanical Telephone Exchange That Actually Works

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 switchbo…