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Cisco ONS 15454 DWDM Reference Manual, R8.5
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Chapter 7      Reconfigurable Optical Add/Drop Cards
7.12.6    40-WXC-C Port-Level Indicators
7.12.6 40-WXC-C Port-Level Indicators
You can find the alarm status of the 40-WXC-C card 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.
7.13 MMU Card
The single-slot Mesh Multi-Ring Upgrade Module (MMU) card supports multiring and mesh upgrades 
for ROADM nodes in both the C band and the L band. Mesh/multiring upgrade is the capability to 
optically bypass a given wavelength from one section of the network or ring to another one without 
requiring 3R regeneration. In each node, you need to install one east MMU and one west MMU. The 
card can be installed in Slots 1 through 6 and 12 through 17.
7.13.1 MMU Faceplate Ports 
The MMU has six types of ports:
 • EXP RX port: The EXP RX port receives the optical signal from the ROADM section available on 
the NE.
 • EXP TX port: The EXP TX port sends the optical signal to the ROADM section available on the NE.
 • EXP-A RX port: The EXP-A RX port receives the optical signal from the ROADM section available 
on other NEs or rings.
 • EXP-A TX port: The EXP-A TX port sends the optical signal to the ROADM section available on 
other NEs or rings.
 • COM TX port: The COM TX port sends the optical signal to the fiber stage section.
 • COM RX port: The COM RX port receives the optical signal from the fiber stage section.
Figure 7-35 shows the MMU card faceplate. 
Table 7-40 40-WXC-C Card-Level Indicators 
Card-Level Indicators Description
Red FAIL LED The red FAIL LED indicates that the card’s processor is not ready or that an 
internal hardware failure occurred. Replace the card if the red FAIL LED 
persists.
Green ACT LED The green ACT LED indicates that the 40-WXC-C 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.