If they were, every time you had a communications problem, the answer would be simple.

On the other hand, we don't have a communication problem.

Efforts have been made to sort out potential communication problems.

It is considered to be more than just a communication problem.

But because of the time difference and communication problems it'd be morning before they heard anything.

We're going to have communications problems until that thing's past.

South won with the jack and had a communications problem.

In the early days there had been a communications problem.

East's eight forced the king, and South was beginning to have communications problems.

In case of a difference, there have been obviously communication problems.