Posted by Ronnie Budd on June 03, 2020 at 13:01:04 from (184.53.33.73):
In Reply to: What is this posted by John in La on June 02, 2020 at 20:08:23:
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I was trained in the maintenance and operation of those electromechanical stepping switches. The first ones we had in the DCO were Strowger stepping switches. Each one had 10 vertical positions and 10 rotary positions and could service 100 lines. They required a lot of maintenance.
In time, they were replaced by Stromberg Carlson X-Y stepping switches. They were also 10X10, but in vertical and horizontal planes. They were a lot more reliable. Then the digital stuff starting coming in as rotary dial phones were being replaced by the new DTMF (push button) phones. There was a period of time where both types of switches were required since people were slow to adopt the DTMF phones.
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