QR-4
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
Meaning
GREEN
Phantom current present (port inserted).
OFF
No phantom current present.
Blinking RED
Speed-fault condition caused the port to
wrap.