D-Link DES-5200 User Manual page 39

Fast Ethernet Switching System User's Guide
Col
Col means collision. The Col LED is amber when collisions occur at the port.
Collisions are normal on the network. You should be concerned when a high
number of collisions happen at the port.
Table 8: 2-Port Tx Module LEDs
LED
100/10 (Speed)
(Green)
Link (Link)
(Green)
FDX (Duplex Mode)
(Green)
Tx (Transmission)
(Green)
Rx (Receiving)
(Green)
Col (Collision)
(Amber)
LEDs
Lit
Port is set for 100 Mbps
Port is linked to another
device
Port is in full duplex
Port is transmitting data
Data is being received at
the port
Collisions are occurring at
the port
Dark
Port is set for 10 Mbps
No link
Port is in half duplex
Port is not transmitting data
Port is not receiving data
No collisions are occurring
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