Current fire-code requires that larger buildings have fire-alarms with redundant phone-lines for fire-alarm monitoring. Each phone-line costs approx $50 per month. Phone-line redundancy is not needed. Duplicate phone lines go from the same junction box, through the *same* cable, to the same phone-switch. If one phone-line is damaged, both are! This is "fake" redundancy, yet it costs businesses, condo owners and apartment ...more »
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