Chapter 1:
Introduction
Page 1-6 Token Ring Switch Module User Guide
1.7 LEDs
Each Token Ring module provides 18 green LEDs for troubleshooting
and status monitoring. For each of the four Ring ports there are four LEDs
labeled RX, TX, ST, and 16. Additionally there are two module LEDs
labeled PROC and PWR. The LEDs are described in Chapter 5 of this
manual.