Review on Qooltek ST-NET Ethernet Surge Protector with PoE+ Gigabit Modem Thunder & Lightning Protection - ST-RJ45 by Rod Evans

The device only protects half of the data path. Pins 1, 2, 3 and 6 are protected - pins are used to connect 100 Mb. Pins 4, 5, 7 and 8 - additional pins for gigabit connections - go straight through and are not protected. The device description states that 1000 Base-T Ethernet is secure. That's totally wrong. Also, they didn't even use "real" TVS diodes. They built it with 1n4007 diodes in series with half the pins that have no real potential as surge protectors. They can short out if enough current flows through them. They are also not allowed to open. Again, 1n4007 diodes are NOT rated for TVS surge suppression devices. This device is basically unusable for the advertised purpose.