Interesting, that quarantine ad. That company was merged/assimilated into Ohio Bell sometime subsequent to that (50 miles south in Cincinnati the Bell affiliate, Cincinnati Bell, was never assimilated)....they were the best phone system I've ever experienced when I lived there... Fascinating fact---the independent phone companies (Frontier/GTE/Windstream/…) were actually the innovators/first to market in certain parts of the business (dial phones; 911)...believe the inventor was Strowger who started Automatic Electric (which was a big manufacturer for the independents).