Volume 3 of Receiver off hook tone at 440 Hz. for some TDS Telecome Offices? - Video Dailymotion
Did some TDS Telecom offices have this ROH tone. Concord Telephone Exchange Inc. in Farragut
Tn. had this ROH tone. But TDS bought them out. But did they keep this ROH tone or change it?
I just love to watch trains and explore the history of Telephone Exchanges.
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