AddSecure has launched the NGP Advanced Extra DP4, a new addition to its NGP Advanced range. The device delivers DP4-grade dual-path signalling over LAN and 4G with dual SIM capability.
Under the updated BS 5839-1:2025 code of practice, alarm transmission equipment must meet strict performance criteria to ensure reliable and timely summoning of the Fire and Rescue Service (FRS).
For Category L systems, dual-path alarm signalling is required, single-path failures must reach the Alarm Receiving Centre (ARC) within 90 seconds, and any catastrophic failure, a loss of both signalling paths, must be indicated at both the ARC and the Control and Indicating Equipment within three minutes. These requirements correspond to DP4-grade for alarm signalling.
The Advanced Extra DP4 complies with these requirements. It provides 90-second single-path failure reporting, with step-up reporting on the secondary path when the primary path fails, alongside three-minute catastrophic failure indication.
