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PWR - Power
The PWR LED remains lighted GREEN during normal operation,
indicating the reception of power. If the LED is off, the CM is not
receiving power.
2 Rings - CM Split
The 2 Rings LED lights YELLOW to indicate the CM is split into two
rings. An unlit LED means all four ports are on the same ring.
16 Mb - Ring Speed(s)
Each 2-port MAU has a 16 Mb LED. The LED lights YELLOW to
indicate a 16 Mbps ring speed on the associated MAU. An unlit LED
indicates a ring speed of 4 Mbps on the associated MAU.
If the MCC-D2PM has only one ring then the status of the top
16 Mb LED indicates the speed of the entire MCC-D2PM. The bottom
LED will be off.
P1, P2, P3, And P4 - Ports
The P1, P2, P3, and P4 LEDs indicate the status of the associated lobe
port, as described in the table.
LED Activity
GREEN
OFF
Blinking RED
QR-4
Meaning
Phantom current present (port inserted).
No phantom current present.
Speed-fault condition caused the port to
wrap.
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