It’s still going on
We were putting a fiber network into all the fire/rescue, police, schools, library, and district office buildings.
It started as a fiber data network. They were going to pull fiber into all these buildings for just data. We told them that they could do VoIP for not much more. Get rid of their Verizon service. Save a bunch of money. This was in 2003. They were surprised that you could do voice over a fiber circuit.
One of the first things we did was inventory their Verizon service. We discovered that they were being billed for 3,300 lines that were not in use. Seems that when they hired a new employee or moved someone to another building they would order a new phone service. But never cancel the old number for someone quitting or moving. So they ended up with all these phone lines that no one was using. I think they were paying Verizon $75 a device back then.
Really stupid people. They required us to negotiate new contracts every year. Wouldn’t let us do a multi year contract. Every year we raised our rates so it always cost them more.