Was back to this job today, it is a CB, using CH 26, and the dispatcher said he had someone check the radio all out for "RF leakage", said it was OK. Also, he said that sometimes when someone is on line 1 and a call comes in on line 2 it cuts off line 1. Guess there's a little more going on than they first thought. These ARE corded sets for multi-lines and I would need Sherlock Holmes to get the right info out of these guys, esp. when they are busy. They aren't too concerned about the problem and I am real busy, so I am not going to see it resolved I guess.
Sorry this little "brain teaser" from real life wasn't more fun, thanks for the input.