Touch Tone Tommy,

Sorry for not being clear about the trouble.

Power cycling the system clears the line from being inaccessible and having no dial tone.

I'm not certain that I can consistantly duplicate the problem, but I will give it a try.

As for the Auto-Intercom buttons, I will have to temporarily install a 34 button set in order to cover all of the extensions in the system. There are 16 extensions plus 2 door phones. I had also already checked to make sure that there are no C.O. lines assigned to them.

If there is no voice mail card in the system, do I still need to be concerned with extensions 78 and 79?

Thanks to you and blklabs for taking the time to read my post.

Peter.