Was this off hook tone popular through out Tennessee

Was this off hook tone popular though out Tennessee? I saw there were a lot of Tennessee Telephone Company Inc. Offices with ATT/Philps Tel 5ESS-PBX Host Switches. So was this off hook tone popular through out Tennessee? I still wanna know what kind of off hook tone this is and what the technical name for this off hook tone was. Please let me know, Thank you.