I work at a small college that has a Contel Executone 3672 phone system installed. It's been there since the early 90's. This morning, all the phones in the building started ringing at the same time. When you pick up the handset all you hear is a lot of "high-voltage" static. I have reset the system several times, cleaned the various components, etc. but nothing has worked. Everytime I turn the system back on, all the phones start ringing continuously. My question is this: What's the best way to troubleshoot my problem? Should I be looking at replacing the ring generator unit or the DC/DC Converter or something else? Any help on this would be greatly appreciated.
