Pro-Tek5 Systems, Ltd. supplies dedicated products for the protection of Ethernet cabling systems.

Current products include 5KV isolation modules and GR1089 lightning and static discharge protection modules.
The assemblies are designed to be installed in the existing twisted pair cabling ("in-line" ) of the Ethernet network.

Typical applications are critical networks such as industrial Ethernet, medical networks or other applications where computers and accessories as well as people need to be protected from overvoltages.