Learn how to identify evidence of a loose or damaged patch panel or network switch in the communication path through physical inspection, link status analysis, network performance symptoms, loopback testing, environmental factors consideration, and event log review. Are the LEDs on the PLC's Ethernet port showing normal link and activity status? To determine if the LEDs on a PLC's Ethernet port are showing normal link and activity status, refer to the standard Ethernet port LED behavior, which is generally as follows (though always confirm with the specific. Leviton offers the industry's best global patch panel service and logistics with a wide array of flexible solutions for every application, backed by industry leading service and support. QUICK LINKS: Copper Systems | Data Center Solutions | Enterprise Solutions | NS Support Leviton offers the. Patch panels are one of the best ways to manage an expansive local area network (LAN) by providing quick and easy access to the ports and connections that connect them altogether. Patch panels serve as a central point for managing and organizing cables, connecting incoming and outgoing lines within a network.