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. 

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