I just love to watch trains and explore the history of Telephone Exchanges.
Monday, October 31, 2016
Robbie Cain: Receiver Off Hook tone for Telephone Switch type A...
Robbie Cain: Receiver Off Hook tone for Telephone Switch type A...
: This was the off hook tone for Telephone Switch type ATT/Philps Tel 5ESS-PBX Host. What kind of sound is this? What is the Technical name ...
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