Buddy just took over a auto dealership, which has a coral system, been empty for 6 months , lines are to be gnd start , 11 lines , can call in , but from the console sta 300, when calls come in cannot ans on handset, just speaker phone, red lights flashing below volume control, can't call using handset, just on this set, what gives, from an avaya tech , just hoping to use this system for about a year