Up until a week ago, everything on this install was going great, except for UCA which is a different issue all together. The tech that put the system in transferred and I inherited any future issues. Let me preface my issue by saying I don't sit for certification until the May 20th class in Atlanta.
I have one DDM16b running ~8 digital sets. One week ago, all 8 went out with major alarms. The keypads are responsive upon unplugging and plugging back in the sets but nothing appears in the display.
On the DDM itself, the "Remove" indicator is illuminated. I replaced the card today, no change. Had 24 volts tested at block on all used extensions even with previous card, which coming from Samsung OfficeServ (5 years there) usually means the card is good...
So what's next?