Thanks for helping!

In order of your questions.

1. Phone system is a Comdial(Impact) system.

2. Not sure I know what you're asking about the ports. I didn't disconnect anything at the phone system end. the only connections at the voice mail system were two RJ-11's (and monitor and keyboard). I've tried swapping the RJ-11's, but that didn't fix my problem.

3. Serial, I think. Again, not positive I know what you're asking, but on the "mailbox" screen, in the "sequence to turn on message waiting lamp", it says serial.