Central Station Monitoring and Alarm Communicators

How it works

The communicator connects to the fire panel's dialler or relay outputs and transmits signals over LTE cellular and/or the internet. A dual-path unit uses both and reports when either fails. Signals go to a listed monitoring centre, which verifies and calls the fire department. The link is supervised: if the communicator stops checking in, that loss of contact is itself treated as a reportable condition.

Who needs it

Required where codes mandate supervised fire alarm or sprinkler monitoring — NFPA 72 Chapter 26 in the US; the National Building Code and ULC-S561 in many Canadian occupancies.

Codes, standards and listings

Canada

Monitoring centres listed to ULC-S559; monitoring connection per ULC-S561, required in many occupancies under the National Building Code.

United States

Communicators listed to UL 864; monitoring centres listed to UL 827; monitoring per NFPA 72 Chapter 26.

What the market looks like

Telguard and Napco (StarLink) make communicators sold through security distributors to licensed installers. Owners normally deal with their fire alarm dealer or monitoring company, which supplies the communicator and the monitoring contract together. The pressing issue is the retirement of copper phone lines (POTS): older panels that dial out over a landline need a listed cellular or IP communicator.

Features that actually matter

Cellular and IP paths

LTE and/or internet transmission replaces the old phone-line dialler.

Dual-path supervision

Reports the failure of either path, so one dead link does not leave the building silently unmonitored.

Listed monitoring centre

UL 827 in the US, ULC-S559 in Canada. An unlisted security monitoring service does not meet fire code.

Alarm, supervisory and trouble signals

Not just fire alarms — a closed sprinkler valve or a panel fault is reported too.

What it really costs

Up front

Communicator hardware and installation: No reliable public figure — get quotes.

Consumables

None. Cellular service is normally bundled in the monitoring fee.

What else you'll need

Reprogramming the panel and testing that signals reach the centre.

Over five years

Monitoring at USD $30–$100 a month (≈ CAD $40–$140) is roughly USD $1,800–$6,000 over five years.

Monthly monitoring range from a US contractor cost guide (2025–2026); CAD figures converted from USD at ~1.38; we found no Canadian contractor pricing to check them against. No communicator hardware price was found.

How it differs from the alternatives

Versus copper phone line dialling

Copper is being retired. A listed cellular/IP communicator is the replacement, and supervising the path is more reliable than hoping a landline still works.

Single versus dual path

Dual path costs more but means the building is not silently unmonitored when one network goes down.

If not this, then what

• Keeping the copper diallerNot a long-term option as telcos retire POTS lines.
• Single-path cellular communicatorLower cost where the code and authority accept it.

Caveats

• Telcos are retiring copper phone lines; panels dialling over them should be migrated to listed cellular/IP communicators.
• Canadian monthly figures are converted from US pricing; not verified against Canadian providers.