Critical communications
Reliable critical communications when every second counts
Resilient digital communication systems for life, business and mission critical applications to replace BT landline connections. ControlFreq offer robust hardware, monitored mobile connectivity with inbuilt multi-network redundancy and real-time cloud monitoring to proactively detect and instantly report any disruption.
Future-proof your critical communication systems now
As traditional PSTN fixed-line networks are being retired, ControlFreq provide modern, reliable alternatives with advanced features and inbuilt redundancy to satisfy the requirements of demanding critical applications.
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Landline Alternative for Lift Phones
Replace outdated landlines on emergency lift phones with modern 4G-VoLTE communicators to provide reliable audio communication and DTMF during critical situations, with 24/7 cloud monitoring, battery back up & mains fail monitoring.
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Help & Info Point Upgrades
Modernise your help point intercoms and info-points with advanced 4G-VoLTE technology, ensuring clear audio quality and reliable connectivity for public assistance and emergency response systems.
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PSTN to 4G-VoLTE Upgrade
Transform legacy PSTN landlines to modern 4G-VoLTE systems with multi-network redundancy and real-time cloud monitoring, ensuring uninterrupted communication for any system typically connected to a landline.
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Multi-network IoT SIM Connectivity
Global-roaming multi-network SIM cards designed specifically for critical communications applications, providing seamless connectivity across different carrier networks, including 4G-VoLTE voice on all 4 UK carriers.
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Remote Loudspeaker Systems
Advanced 4G-VoLTE audio communication systems for remote loudspeakers, enabling clear, reliable public address capabilities in security applications where high volume audio challenge is required.
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BT Landline Alternatives
Future-proof alternatives to traditional BT landline connections, offering enhanced reliability, better audio quality, and advanced features for business and critical communications.
Why choose our critical communication solutions
Our solutions are designed to provide unmatched reliability, redundancy, and performance for environments where communication failures are not an option.
Reliable by Design
Automatic multi-network switching for inbuilt redundancy ensures communication systems are able to find another carrier if one goes down.
Real-time Visibility
WebAlarm™ is a cloud-based monitoring platform for instant notification and real-time device status minimising downtime.
Global Connectivity
Our multi-network SIM connectivity delivers stable, monitored connectivity anywhere in the world on multiple carriers.
Hassle-fee Implementation
Seamlessly integrate with existing systems and infrastructure, with minimal disruption to existing operations, to simplify upgrades.
Regulatory Compliance
ControlFreq observe industry regulations and safety standards for critical communications such as BS-EN81-28 for lift alarms.
7-day Phone Support
Technical support when you need it, not only when our office is open. Rapid response by experienced engineers to keep you going.
Speak to our team about your critical communications
Our experienced team is here to help with reliable digital communication technology to transition your systems into the future.
Trusted by market innovators and installers
Frequently asked questions
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BT is retiring the PSTN network as of January 2027. They are urging customers to implement digital alternatives by the end of December 2026 to avoid service disruption. ControlFreq offer a seamless transition away from traditional PSTN landlines with zero downtime and at a minimal cost. We handle the entire process, ensuring your communication systems continue uninterrupted.
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Our EvolveSIM™ multi-net IoT SIM connectivity automatically connects to the strongest available network from multiple carriers. If one network experiences issues, the system seamlessly switches to an alternative network without interruption. This provides significantly higher reliability than single-network solutions, especially in critical environments such as emergency lift phones or fire alarm signalling
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Yes, our critical communications solutions meet or exceed relevant safety regulations and industry standards. Our LANDLINE-4G digital communicator adheres to the requirements of BS-E81-28 for emergency lift remote alarm communications. While it is not bound by the compliance requirements being outsode the scope of the lift phone equiplment itself, it supports all required features of the standard, to uphold the compliance of a previously compliant system. These include two-way audio communications, DTMF control, remote dial-in for alarm receiving centres to reconnect the call, 8 hour battery backup, 2 hour talk time, mains fail/restore monitoring and notifications and adds additional features such as realtime network connectivity fail/restore with instant notification of any detected downtime.
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Our WebAlarm™ cloud monitoring platform provides alarm notification and real-time status of ControlFreq devices, anywhere in the world. WebAlarm™ shows mobile connectivity, mains power, battery status, and emergency lift phone call history through a online dashboard.
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Implementation timelines vary based on project scope and the integrator schedule. ControlFreq support the deployment to ensure an efficient rollout process.