L-COM ALS-CAT6JT Compact Weatherproof 10/100/1000 Base-T CAT6 Gas Tube Lightning Protector- RJ45 Jacks. The ALS-CAT6JT Lightning Protector provides superior lightning and surge protection for indoor 10/100/1000 Base-T Ethernet networks. The unit has low line to line and line to ground capacitance to minimize distortion of high-speed signals. The design provides protection for both common and differential mode surges. This protector is compatible with 802.3af/at Power-over-Ethernet (PoE) devices. This device supports PoE mode A and B for power. The ALS-CAT6JT shielded RJ45 jacks are isolated from the safety ground. This minimizes the chance of a ground loop being introduced. This unit features a weatherproof ABS enclosure with gasketed cover and concealed mounting holes. PG16 cable glands are provided on the enclosure as well as an external ground clamp to provide a tie point for earth ground. The PG16 cable glands are large enough to pass an un-booted RJ45 connector through so pre-terminated cables can be used.