What is the simplest solution I might consider?

A ‘single path’ solution, which includes a digital communicator connected to your telephone line (PSTN or IP). The communicator contacts the ARC to report faults and alarms on the system and makes a test call to the ARC daily to confirm the system is working correctly. The individual test calls (and any call charges) should appear on your telephone bill. A ‘dual path’ solution is more robust since if one path were to develop a fault, the second can act as a back-up, since it is unlikely to fail at the same time.

Your installer should inform you of the likely call costs in writing as part of your contract.