Ditek DTK-4LVXR 4 Pair Telephone Entry Protection - 1 Pair 12/24V Power, 2 Pair 130V Telco, 1 Pair 24V Mag Lock Release Ditek DTK-4LVXR 4 Pair Telephone Entry Protection - 1 Pair 12/24V Power, 2 Pair 130V Telco, 1 Pair 24V Mag Lock Release