What is an RJ31X Jack?
Your security system is also designed to plug into a RJ31X jack. The RJ31X provides additional security through a feature knows as “line seizure.” When activated, a relay in your security system “seizes” your phone line and gives the security system priority use of this line, allowing the security system to report its signals to Alarm Relay’s central monitoring station. This means that if you are talking on the phone when the alarm is triggered, your call will be disconnected and the alarm signal will be received by the central station.
