I think you already heard your answer. It has been my experience that transmitters near a phone switch are a major no-no. Since it you found they had one near it, I would think it would be the problem. I have seen it with several systems, but, the Panasonic is really susceptible, since it is in a plastic, unshielded case.
Chris _________________________________________________________________ KX-T Mailing list --- http://kxthelp.com/ Subscription changes: http://kxthelp.com/mailman/listinfo/kxt