We have a few elevator phones (autodialers), and some regular telephones(home phone) that do not break dialtone. We have no problem on fax machines, or on our test sets. This system just got upgraded to the new 7.5 with 1010 cabinet. Also we upgraded to the MG XPEC contollers on the IPE shelves. Is there a setting in COS that needs to be changed for these specific ports? they worked fine before the upgrade from 5.5