ActronAir 3-Way RJ45 Zone Cable Joiner allows ActronAir zone barrel cables to be joined and split without cutting or re-terminating the cable, maintaining the cable integrity required to preserve system warranty. Cutting or incorrectly terminating zone cables causes intermittent zone faults and can void the ActronAir system warranty — use only genuine ActronAir joiners for all zone cable connections. Compatible with all ActronAir Integrated Zone Barrel assemblies.