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Cisco EF4116 Hardware Installation And Maintenance Manual page 90

4000 series
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Reading Network Processor Module LED Indicators
Figure 4-11
Multimode ports
Alignment groove
Figure 4-12
Multimode port
Alignment groove
When lit, a module LED indicates a ring up condition. Dual-attachment FDDI module LEDs
indicate which PHY on the network processor module is inserted into the ring; if a PHY is not
actively inserted into the ring, the LED is not lit. On a single-attachment module, the LED indicates
ring up when lit; when the LED is not lit, it indicates that the module is not inserted into a ring.
4-10 Cisco 4000 Series Hardware Installation and Maintenance
Dual-Attachment Multimode FDDI Module—End View
PHY-B
PHY-A
Single-Attachment Multimode FDDI Module—End View
PHY-S
LEDs (2)
PHY-B
FDDI
PHY-B
RING OP
OPT-BYPASS
PHY-A
PHY-A
RING OP
Mounting
screw locations
LED
FDDI
OPT-BYPASS
PHY-S
PHY-S
RING OPT
Mounting
screw locations
Optical bypass
switch connector
Alignment groove
Optical bypass
switch connector
Alignment groove

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