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Cisco ONS 15454 DWDM Reference Manual, R8.5
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Chapter 7      Reconfigurable Optical Add/Drop Cards
7.13.5    MMU Port-Level Indicators
7.13.5 MMU Port-Level Indicators
You can find the alarm status of the MMU card’s ports using the LCD screen on the ONS 15454 fan-tray 
assembly. The screen displays the number and severity of alarms on a given port or slot. For the 
procedure to view these counts, refer to “Manage Alarms” in the Cisco ONS 15454 DWDM Procedure 
Guide.
Green ACT LED The green ACT LED indicates that the MMU card is carrying traffic or is 
traffic-ready.
Amber SF LED The amber SF LED indicates a signal failure on one or more of the card’s 
ports. The amber SF LED also turns on when the transmit and receive fibers 
are incorrectly connected. When the fibers are properly connected, the light 
turns off.
Table 7-42 MMU Card-Level Indicators (continued)
Card-Level Indicators Description