I have never been able to figure it out, the idea was, it was supposed to be a Music On Hold audio input, but there is no doumentation on what port # it would be, to use it via the "change system features" and assign the input to the as a MOH port.
I think it's one of those 'features' that was added, without too much thought put into it. The hardware design people not communicating to the software guys...
Mitch
Mitch
AVAYA Certified Expert