10BASE-T Ethernet Mini Hubs User’s Guide
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
◊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
◊Blinking: Packet reception is occurring.
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