AddSecure expands dual-path fire alarm signalling range in the UK
Iain Hoey
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AddSecure launches DP4 signalling product
AddSecure has launched the NGP Advanced Extra DP4, a dual-path fire alarm signalling device designed to meet the latest BS 5839-1:2025 requirements.
The company announced the product on 5 March 2026 and said it uses LAN and 4G with dual SIM capability to provide DP4-grade signalling for fire alarm systems.
Under BS 5839-1:2025, alarm transmission equipment for Category L systems must meet specific performance criteria for summoning the Fire and Rescue Service (FRS).
Single-path failures must reach the Alarm Receiving Centre (ARC) within 90 seconds.
Any catastrophic failure – defined as the loss of both signalling paths – must be indicated at both the ARC and the control and indicating equipment within three minutes.
AddSecure said the Advanced Extra DP4 meets those requirements through 90-second single-path failure reporting, step-up reporting on the secondary path when the primary path fails and three-minute catastrophic failure indication.
Nicholas Whiting, VP Alarm Signalling, AddSecure UK, said: “The launch of NGP Advanced Extra DP4 reflects AddSecure’s commitment to supporting the industry through critical changes such as the PSTN switch-off and the move to IP networks.
“By meeting the latest BS 5839-1:2025 requirements and offering dual-path resilience, this solution ensures life safety systems remain reliable and compliant.
“Installers can trust that Advanced Extra DP4 combines robust performance with third-party certification through the Loss Prevention Certification Board (LPCB), our BSI Kitemark and ISO 27001 certification for advanced cyber security standards,”
AddSecure expands its DP4 portfolio
The new device joins two existing DP4 products in AddSecure’s range.
Those products are Ultimate with Access Line, which includes a managed broadband service and router intended to remain operational during power outages, and Ultimate without Access Line, which uses customer-managed broadband.
The company said its dual-path products are certified for both fire and security applications, allowing installers to use one device across both areas.
AddSecure also said the range includes zero upfront costs, with billing on activation or after 60 days.
It added that its dual-path products have third-party certification through LPCB and a BSI Kitemark for IoT cyber security.
The company also said its cyber security measures exceed the requirements of the Product Security and Telecommunications Infrastructure (PSTI) Act, and noted that it holds ISO 27001 certification.
AddSecure entered the UK alarm signalling market in June 2024 following the closure of BT Redcare, and said its Next Generation Portfolio builds on its telecoms, security and cloud communications background.