Strowger Step-by-step Demonstration

A short training film, believed to be from Telstra showing the operation of Strowger telephone switching using a model exchange.
It illustrates a uniselector, group selectors and a final selector. Note the mix of 2000 type and 4000 type groups selectors. Video courtesy of Richard Youl.
A correspondent adds:
"This is from the first year apprentice course at the Telecom Training School at Tooronga in Melbourne from the mid 1970's. I remember it well."

Видео Strowger Step-by-step Demonstration канала Sam Hallas