3F55-01 Led Sequence - Cabletron Systems 3F00-01 User Manual

2.2.2 3F55-01 LED Sequence

Figure 2-6 shows the positions of the LEDs on the 3F55-01 front panel.
3F55-01
OFFLINE
The LED power-up sequence for the 3F55-01 is as follows:
1. All LEDs light briefly and turn off, except for the PWR LED, which
remains on.
2. The PROC LED lights while power-up diagnostics are being run on
the 3F55-01.
3. The WRAP LED for Ring A lights briefly.
4. The TX and RX LEDs flash.
5. The PROC LED lights again when the 3F55-01 software initializes
and remains on.
6. The RING A and RING B RX, TX, THRU, and WRAP LEDs remain
off until the module is connected to the network.
Note: RING A refers to the primary FDDI ring, and RING B to the
secondary FDDI ring. These LEDs do NOT correspond to FDDI MIC A
and FDDI MIC B.
FDDI Dual-Attached Intelligent Module User's Guide
OPTICAL BYPASS
FDDI MIC A
SINGLE-MODE
Figure 2-6 3F55-01 LEDs
Chapter 2: Connecting to the Network
FDDI MIC B
SINGLE-MODE
SN
THRU
RX PROC
RING A
RING B
TX PWR
WRAP
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