Normal Assignment | Uplink Assignment | ||
on Ports | |||
Pin Assignment | on Port 8, 16, or 24 | ||
|
| ||
|
|
| |
1 | Input Receive Data + | Output Transmit Data + | |
|
|
| |
2 | Input Receive Data - | Output Transmit Data - | |
|
|
| |
3 | Output Transmit Data + | Input Receive Data + | |
|
|
| |
6 | Output Transmit Data - | Input Receive Data - | |
|
|
| |
4, 5, 7, 8 | Not used | Not used | |
|
|
|
Troubleshooting Information
Symptom | Cause | Solution |
|
|
|
Power LED off | No power at hub | Check the power cord connections. |
| In a stack, no | Check the power cord. In a stack, the |
| power at hub but | termination circuitry gets power from the |
| Terminator LED is | cascade cable. If one hub in the stack has a |
| on | faulty power cord or the cord is unplugged, the |
|
| Terminator LED remains on and the remaining |
|
| hubs in the stack operate normally. |
|
|
|
Terminator LED of a | Cascade cable not | Check for proper connection. |
middle hub in a stack is on | connected properly |
|
|
|
|
Link LED off or intermittent | Port connection | Check the crimp on the |
| not functioning | make sure that the plug is properly inserted and |
|
| locked into the port at both the hub and device. |
|
| Make sure cabling is Category 5 and meets the |
|
| requirements for 100 Mbps operation. |
|
| Check installation of the network interface cards |
|
| and verify that they are 100 Mbps capable. Be |
|
| sure that the proper software driver is loaded. |
|
| Check link LEDs on the network adapter card |
|
| and PC or workstation. Make sure cables and |
|
| connectors are correct. |
|
|
|
Collision LED on or | Collisions taking | Collisions are normal on Ethernet networks. |
blinking | place on network | Excessive collisions can be caused by incorrect |
| segment(s) | cabling, connectors, or wiring techniques or can |
|
| occur when the network is too busy. Ensure that |
|
| the far end is set to |
|
| operating properly. Check for these problems. |
|
|
|
Problems with port 8 on | Normal/Uplink | Check the Normal/Uplink push button on the |
the Model DS508 hub, | push button in the | front panel. |
port 16 on the Model | wrong position |
|
DS516 hub, or port 24 on |
|
|
the Model DS524 hub |
|
|
|
|
|
Model DS508/DS516/DS524 Dual Speed Stackable Hub Installation Guide