Specifications

Operation
RADring
Installation & Operation Manual
4-2 Diagnostics and Troubleshooting 3/11/98 12:28
4.2 Diagnostics and Troubleshooting
All of the module cards use a common set of indicators which are displayed
in Table 4-1 below.
Table 4-1 Common Module Indicators
LED Name Color Meaning
PWR Green Lights when module receives power from the
MNG Green Lights when a command received from network
management is being executed on the individual card
POWER LED does not light:
•
Check that the module is properly inserted in the slot. Remove and
reinsert if necessary.
•
Check if the other hub modules have power. If not, check that the power
cable is connected and switch is on. Check the fuse and power supply. If
it is blown, replace.
•
Check if a different module has power when inserted in this slot:
If not, there may be a problem on the backplane.
If a different module does have power in this slot, the malfunction is in
the module card itself. Try to replace the fuse located on the module
card.
Management LED lights:
•
This indicates that a management operation is currently in process. This
may be from the management station or in case of Token Ring modules
only an automatic recovery process initiated by the CML/IB agent.
Modules can be divided into a few different types, based on their LEDs and
troubleshooting procedures: Lobe modules, Ring In/Ring Out modules, TRE
modules, Ethernet Management modules and MLB-T.
Lobe Modules
Lobe modules consist of the following:
TL-4 (TL-4/U, TL-4/SU, TL-4/S, TL-4/SD)
TL-4/A (TL-4/AU, TL-4/ASU, TL-4/AS, TL-4/ASD)
TL-4/CX
TL-2/F
TL-2/ED (TL-2/EDU, TL-2/EDS, TL-2/EDSU)