Troubleshooting
Reading the LEDs
Table
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| Table | LEDs on the Host Device Front Panel | ||
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| LED | State | Description | |
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| WAN 1 | Off | Inactivity on the synchronous serial port 1. If you are sure some data activity is going | |
| Activity |
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| on this port, check the serial 1 cable connection. |
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| On/Flashing | Transmitting/Receiving data on the synchronous serial port 1. | |
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| WAN 0 | Off | Inactivity on the synchronous serial port 0. If you are sure some data activity is going | |
| Activity |
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| on this port, check the serial 0 cable connection. |
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| On/Flashing | Transmitting/Receiving data on the synchronous serial port 0. | |
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| BRI | Off | Inactivity on the ISDN BRI port. If you are sure some data activity is going on this | |
| Activity |
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| port, check the BRI cable connection. |
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| On/Flashing | Transmitting/Receiving data on the ISDN BRI port. | |
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| LAN | Off | Inactivity on the LAN Ethernet port. If you are sure some data activity is going on | |
| Activity |
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| this port, check the Ethernet cable connection that goes into the front of the host |
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| On/Flashing | Transmitting/Receiving data on the LAN Ethernet port. | |
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| N O T E |
| Although the “Fault” orange LED on the host device front panel is not for this | |
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| HP AdvanceStack Internet Router only, the fault condition of the router is |
OR’ed with the fault condition from other devices in the host and the host itself. Therefore it is necessary to check all devices in the host device, including this HP J3138A Internet Router, if the “Fault” orange LED on the host device front panel is flashing.
Maintenance