IBM 5500 Operational, Installation, And Maintenance Manual page 74

Chapter 5: Troubleshooting
Understanding the Adapter LEDs and Labels
The adapter LEDs and address labels provide information useful for
monitoring the status of the adapter and for solving problems.
Universally
Administrated
Address Label
Green LED
Amber LED
55E1I043
Figure 28: Rear view of Token Ring Adapter
If the green LED is on and the amber LED is off, the adapter is operating
correctly. If the amber LED is blinking and the green LED is on, a problem
with the adapter has been detected.
Definitions for italicized terms can be found in the "Glossary" on page 181.
74 Planning, Installation, and Maintenance Guide