From premises to ARC: the signalling chain

Follow a signal from the premises outward. It starts at the alarm panel and its communicator, crosses one or more access networks, is carried by a transmission service to a receiving point, and is finally handled by the equipment at the alarm receiving centre. Each link has an owner, and a signal that is raised but not acted upon has failed somewhere along it.

The part worth being precise about is the boundary between the transmission service and the receiving centre. EN 50136 scopes the transmission system, the carriage of the signal and the supervision of its path. The receiving centre is a separate function with its own responsibilities. Treating the whole chain as one black box is how an operator ends up unable to say which link failed.

The test that matters is not that a path is up, but that a signal raised at the panel is received and actioned at the far end. That is an end-to-end property, and proving it means confirming delivery at the receiving centre, not just connectivity across the network. Build that into commissioning and maintenance, so a successful alarm is a recorded fact and a path fault is detected and reported rather than discovered after an incident.

Netavo provides the critical-path connectivity that carries alarm signals, with up to four verified paths per site. It is integrated with all of the main UK alarm receiving centres, so a site does not need to change ARC. Netavo provides the transmission paths; the receiving centre itself remains a separate service.