The FBI XL31 security system can be monitored by GeoArm when you attach an active Phone or VOIP line directly to the main green motherboard. Once you have installed the phone line into the main control panel you will want to sign up for Phone Line Alarm Monitoring Services.
The second option end-users will have to get alarm monitoring services with this older panel is with the Telguard TG-1 express. The TG1 attaches directly to the main green motherboard and transmits alarm signals back to our central alarm monitoring station. Once you have your Tg-1 Express installed directly into your board you will want to sign up for the Cellular Alarm Monitoring Services.