Low-voltage multi-system reuse-telepone cable

August 13, 2026
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Low-voltage multi-system reuse (multi-purpose cable for one wire pair, standard for cost reduction in government projects)

Large numbers of idle spare wire pairs are commonly reused in government projects to transmit low-speed control signals, eliminating the need for separate wiring:

1. Fire protection system: Fire alarm host linkage voice, emergency broadcast control line, fire telephone extension circuit;

2. Security access control: Park gate control signals, access control card reader, duty room intercom, emergency alarm button;

3. Building automation (BA): Temperature and humidity alarm in computer room, water supply and drainage, remote voice alarm in power distribution room;

4. Confidential monitoring: Environmental alarm in confidential computer room, voice feedback for power failure alarm.