Now much of Knoxville had this receiver off hook tone - Video Dailymotion

Now much of Knoxville had this receiver off hook tone - Video Dailymotion
   How much of Knoxville Tn. had this ROH tone? Concord Telephone Exchange did
and I saw that there was a Halls Telephone Exchange Inc. in Halls Crossroads Tn. and a
Tennessee Telephone Co. up in Halls Crossroads Tn. Did they both have this ROH tone
up in Halls Crossroads like Concord Telephone Exchange Inc in Concord Tn. did? I would still like to know the technical name for this ROH tone and the technical name for this ROH tone. Please let me know. Thank you.