An elevator emergency phone is one of the few pieces of building technology with its own dedicated federal code requirement. ASME A17.1 and the ADA both require a two-way communication path from the elevator car to a 24/7 monitored location. For decades, that path was a copper POTS line. Now that copper is being retired, every property manager with an elevator needs a migration plan.
Why elevator phones are uniquely tricky
- The elevator phone is hardwired into the elevator controller — you cannot just plug it into a desk phone jack.
- It must work during a building power outage (battery backup is non-negotiable).
- The line is supervised: if it goes dead for more than a few minutes, the elevator company gets a fault and the car may be taken out of service.
- Inspectors check the line at every annual elevator inspection. A non-working phone is a fail.
The standard migration path
- Install an LTE-based POTS replacement device in the elevator machine room or hoistway top. It presents an RJ-11 jack identical to the old copper line — the elevator phone wiring does not change.
- Use a device with 8+ hours of battery backup so the phone keeps working during a power loss, matching the elevator's own emergency lighting runtime.
- Confirm dual-SIM or multi-carrier failover. A single-carrier device that loses signal during a storm will trigger an elevator fault.
- Test with the monitoring company before the copper line is cut. The elevator company's call center should answer the test call and confirm caller ID, location data and audio quality.
What property managers get wrong
The most common mistake is moving the elevator phone to the building's VoIP system. When the building loses power or internet, the elevator phone dies — and the elevator is required to take itself out of service. The POTS Box avoids this by running on its own LTE connection and battery, completely independent of the building network.
Multi-elevator and portfolio rollouts
If you manage a portfolio of buildings, see our multi-site rollout playbook and the elevator use case page. We routinely provision 20–200 elevator lines for a single property manager on one master invoice.
Request an elevator-line assessment to get a per-elevator quote.