Shortly after we were doing some testing on extension 200 and extension 396 - we started receiving phantom calls with ID 5550000.
Not sure that had any bearing but was shortly after that was done.
When answered an un-inteligble voice utters something about 2 or 3 sylables then it hangs up.
We kept answering or ignoring them until it eventually went away.
Do not believe it was a real call from one of the POTS lines.
Anyone seen something like this?
Bob