I am wondering if anybody has ever tied a Nortel MICS in with an old Telacore PA system. I have a school who has the MICs in place, but would like to tie the PA system into it and get rid of their PA board and just use the phones. They have 76 overhead speakers running off of the PA board right now. Looking for any suggestions to reuse their existing speakers that are in place and tranfer control to the phones for announcements and paging.