As a retired central office tech, I will tell you they would both go out of service after about 20 seconds depending how they are crossed will determine how they go out, may be for battery, cross or ground or MTNCE. They will stay down until the problem is removed. This is a common occurrence, not as you state, but wet cables, dug up shorted cables etc cause the same issues for the oos. As a tech, the list can be pulled. Checking addresses on the lines out can easily tell the tech that a problem is external of the office and possibly a wet or damaged cable.

The only dumb question is the one you don’t ask as that is the question that can make or break you. Brad