If you are using the Total Security system with a SIM card, the provider of the SIM card may require you to activate it before it can be used. Typically they will ask for an IMEI number of the device that the SIM will be used in. Each panel's IMEI number is unique.
To find the IMEI number on the Total Security panel, access the Main Menu, then navigate to the About Us icon and press OK. The IMEI number for the panel will then display on the bottom-left corner of the screen.