Was this the step by step tones after finishing a call for United Telephone Company in Chappel Hill TN

Was this the step by step tones after finishing a call for United Telephone Company Inc in Chappel Hill TN? They had ATT/Philps Tel 5ESS-PBX Host Switches. But sis they have this step by step tones after finishing a call? I still wanna know what kind of off hook tone this was and what the technical name for this off hook tone was. Please let me know. Thank you.