Lift compliance in under 30 minutes.

Replace PSTN lines with non-disruptive, compliant digital upgrades for existing lift phone systems in under 1 hour. Avoid costly breakdowns with real-time monitoring and notifications from your lifts ensuring maximum uptime and public safety.

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  • Quick & Easy Retrofit

    Pre-configured, plug&play hardware to replace BT landlines in minutes not hours.

  • Safety Compliance

    Meet EN81−28 compliance incl. monitored mains, battery b/u & 1-hr talk (4-hr standby)

  • Resilient 4G Connectivity

    Automatic fail-over to all 4 UK mobile networks on connectivity failure.

  • WebAlarm™ | Realtime Visibility

    Log test calls, report mains loss, signal status, lift faults & maintenance alarms, ––in realtime

Technician inspecting an electrical control panel in an elevator lobby.

Always-on connectivity with inbuilt multi‑network resilience

ControlFreq systems are supplied with Global-roaming, multi-network mobile connectivity, with 4G-VoLTE audio on all major network operators. Rapid-retrofit hardware to suit new and existing lift phones simplifies the upgrade.Replace existing analogue PSTN lines with digital 4G-VoLTE communications in literally minutes, ensuring full compliance with BS EN 81-28:2022 (incl. Feb 2025 update).

Map of London showing the location of a building lift with an alert box indicating it has mains power loss.

Real-time visibility with WebAlarm™

ControlFreq devices connect real-time data & analytics to WebAlarm™, giving on-site maintenance, lift engineers and building management teams complete visibility of lift status, power and connectivity, across their entire portfolio. Real-time voice, SMS, push or email notifications speed up resolution and cloud dashboards simplify compliance. ControlFreq offer 7-day technical support to ensure remote assistance is always available when it really counts.

Upgrade the BT line, not the lift phone.
Compliance & visibility in under 30 minutes.

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Obtain EN 81-28 compliance

Ensure legal compliance and avoid fines up to £5,000 per non-compliant lift.

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Beat the PSTN switch-off deadline

Guarantee emergency phone reliability after the January 2027 PSTN switch-off.

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Monitored backup

Maintain public safety with monitored backup during power outages.

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Gain realtime insight

Improve system uptime visibility with event logs and downloadable test-call compliance reporti.

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Instant Alerts on Multiple Channels

Rapid response resolutions with real-time notifications to the right department.

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Simple 30-minute retrofit

Replace the BT line with NO service disruption for fast, hassle-free upgrades.

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Passenger reassurance

Increase confidence through clear, reliable communication.

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Audit-ready reporting in-built

Support maintenance efficiency with compliance-ready records.

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3-day test calls

Test calls are logged with export feature to maintain compliance.

A white rectangular electronic device with four screws on the edges and a black antenna on top.
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Plug&Play installation to replace any existing BT line.
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Can be installed in a lift motor room or controls cabinet in an MRL environment.
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LANDLINE-4G digital VoLTE audio communicator to replace a BT landlines for monitored communications
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Real-time status indicators & live team notifications on faults, alarms and events.

LANDLINE-4G | The Landline Replacement Digital 4G-VoLTE Audio Communicator

Upgrade any new or existing lift phone auto-dialler with the universally-compatible LANDLINE-4G digital VoLTE voice call communicator. It provides a seamless replacement for any BT landline.
Unplug lift phone from the BT line. Plug into the LANDLINE-4G. Make a test call. It’s that simple.

Service element: Global IoT digital connectivity 4G SIM card (all incl. calls) & WebAlarm Live monitoring ensures full compliance with current lift safety standards BS EN81-28:2022.

No Technical Setup

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No Service Downtime

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No Hassles

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No Technical Setup • No Service Downtime • No Hassles •

Built-in multi-network redundancy for maximum reliability.

Book a demo Explore hardware

Universal compatibility with all lift phone manufacturers simplifies the upgrade

LANDLINE-4G, put quite simply, replaces the BT landline. Out of the box it provides an instant communication path for any equipment plugged into a PSTN phone socket. If your lift alarm is connected to a landline socket now is the time to upgrade to a 4G-VoLTE digital solution to remain compliant. dd the benefits of real-time monitoring that traditional analouge phone systems do not provide.

  • Avire Memcom

    Avire Memcom

    Telephones installed in elevators for emergency communication, used to call maintenance or emergency services on breakdowns or entrapments.

  • Safeline

    Safeline

    Alarms for fire detection, intruder alerts, and other security monitoring systems that use PSTN to transmit signals to monitoring centers.

  • Windcrest

    Windcrest

    Systems used for access control in residential and commercial buildings, allowing communication between entrances and occupants.

Map of London with red warning icons and a green checkmark icon indicating status.

WebAlarm™ | Real-time monitoring, communication & control for all lifts.

WebAlarm™ is our proprietary ‘OEM white-label’ cloud-based platform that adds real-time monitoring, communication and global visibility to your lift phone systems as soon as the phone is plugged in to LADNLINE-4G. WebAlarm monitors mains power, battery back up and connectivity status to ensure lift safety compliance is maintained. Gain live insight into your lift estate today...

See WebAlarm Live →

Get connected with ControlFreq

Speak to our solutions team about your challenge. Ask about our no-risk pilot trial on a single lift to prove the solution before you commit.

ControlFreq is a B2B solution partner. We do not install, or sell directly to the public.

The ControlFreq Promise: We respond 7-days a week, 365 days a year.

Frequently asked questions

  • The Public Switched Telephone Network (PSTN) is being phased out in the UK. Older lift emergency phones that rely on analogue PSTN lines will stop functioning. To avoid service interruption, these systems must be upgraded to a digital alternative, such as GSM ie: ControlFreq LANDLINE-4G or IP-based communication. Non-compliant lift phone systems may result in the lift being taken out of service.

  • To comply with EN81-28:2022, an emergency lift communication system must include:

    • Two-way voice communication between the lift car and a rescue service.

    • Remote dial-in communication for the monitoring service to dial back into the lift if cut off

    • Physical testing of the lift alarm every 3 days, using a method equivalent to a user raising a genuine emergency call alarm

    • Monitored battery backup for both the autodialler and, if used, the GSM gateway with 1 hour standby and 15 mins talk time.

    • Automated alarm transmission with confirmation from the rescue service, with no user input required once an alarm is triggered.

    • Automatic identification of the lift’s location and ID to the rescue service.

    • Visual and audible indicators inside the lift car, including green and yellow pictograms and an adjustable tone to indicate call progress and status.

  • Upgrading to a ControlFreq LANDLINE-4G ensures compliance with the BS EN81-28:2022 standard. Upgrading to a GSM gateway that does not meet the standard would not the issue of PSTN shutdown. The upgraded system must also meet the standard’s requirements for monitored battery backup, 15-min talk time on battery, self-testing, alarm verification, and passenger indicators. A GSM upgrade must be part of a wider compliance strategy.

  • Yes. The LANDLINE-4G meets and exceeds the requirments with 8 hours standby and 1 hour talk time on battery back up. All other GSM gateway requirements are also met or exceeded.

  • The building or lift owner is ultimately responsible for ensuring that lift communication systems are compliant with BS EN81-28:2022. LANDLINE-4G ensures saftey compliance by meeting all the requirements of the standard. Installation is a simple plug&play process without the need to replace existing lift auto-dialler hardware. By fitting the LANDLINE-4G, compliance is met. Simply power the device locally to the lift auto-dialler and connect the BT connection to the LANDLINE-4G. Job done!

  • Since February 2025 the lift alarm safety standard BS EN81-28:2022, states the system must be tested every 3 days using the same method as. areal alarm call to simulate a real world scenario.

  • Yes. We offer digital upgrades which replace legacy PSTN lines that allows you to leave existing lift phone equipment in place and simply upgrade the communication path from analogue to digital. We offer a managed service including an initial consultation, detailed proposal, pilot trial and measured results prior to a controlled phased rollout.

  • Yes. Pilot trials are offered to prove functionality and suitability for the application before committing to a phased rollout.