FC is short code for Communication Failure. This will happen if your alarm system tries to communicate with the Alarm Response Center but cannot successfully transmit a signal. This is mainly seen on accounts with phone line service.
- Have you changed your phone service provider?
- Did you add DSL?
- Did you change to to VoIP or cable service?
These are common causes for the FC.
We recommend a cellular module for situations involving DSL, VOIP or cable phone service.