Fire Safety

Emergency Voice Communication Solution for Firefighter Intercom System

In fire safety communication, a commonly used system is the Emergency Voice Communication (EVCS) System. The EVCS system includes a standard master station, system expander panels, fire telephones, outstations type A, call alarms, disabled refuge call points type B.

Emergency Voice Communication Systems (EVCS) provide fixed, secure, full-duplex bi-directional voice communication for firefighters operating in high-rise structures or expansive sites. These systems overcome radio signal failures caused by fire-induced plasma interference (“corona effect”) or structural steel obstruction.

Fire telephones (e.g., VoCALL Type A Outstations) serve as a critical wired backup solution, operating on half-duplex communication with battery support and system monitoring. Mandated in numerous countries for buildings exceeding four stories (UK regulation: BS9999), they address vulnerabilities in conventional firefighter radios, which frequently malfunction in steel-intensive high-rises due to signal disruption from fire corona.

When selecting EVC system outstations, compliance with regional regulations is essential. For instance, UK standards stipulate:

– Type A Outstations: Required for evacuation/firefighting zones.

– Type B Outstations: Permitted only if Type A installation is physically unfeasible.

– Disabled Refuge Areas: Both types are acceptable, but Type B is restricted to environments with ambient noise below 40 dBA.

Ningbo Joiwo is always ready to help you win and complete emergency voice fire communication projects successfully by offering high-quality products, competitive prices, and our professional services.