The property is a bit complicated.
It's officially a single-home residence, but it's actually two condo units.
Due to city zoning laws, both units had to be sold to the same owner. However, the previous owner was renting one of the units out illegally. The previous owner has been dead for two years.
So we purchased unit A and unit C, which had two separate phone lines. Now, we just want one phone line.
But the problem I am having is that we cannot even get all the phone jacks within a single unit (unit A) to work. That's all we want.
Specifically, we need to get the jack working in the office because we need to have the DSL line installed there.
A remote cordless option is not feasible for the home office.