D-Link DE-809TC Diagnostic LEDs on front panel of Mini Hubs Collision, Link/Rx for each UTP port

10BASE-T Ethernet Mini Hubs User’s Guide

DE-809TC

Diagnostic LEDs on front panel of Mini Hubs

♦Collision.

◊Blinking: Packet collision is occurring. Packet collisions are not an abnormal situation. Collisions occur when two or more computers transmit packets on the network simultaneously, and a contention takes place on the network line. The computers should then back off, then retry transmission. This trial-and-error process is repeated until no collision takes place. Note: Excessive collisions may result when multiple hubs are cascaded through a thin coaxial segment and many stations are connected on the network.

◊Off: No packet collision.

♦Link/Rx (for each UTP port).

◊ON: Data link between (1) Mini Hub’s UTP port and (2) node’s or cascaded hub’s UTP port is successful.

◊OFF: (1) No data link or (2) cable disconnected. Check for bad cable or loose connectors. For cascaded hubs, check to see if UTP cable contains crossed-over wires. Also check for a “power good” condition at both ends of the connection. If you suspect that the hub port is damaged, contact your authorized dealer for service.

◊Blinking: Packet reception is occurring.

Installation 15