user manual

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Cisco ONS 15454 SDH Reference Manual, R5.0
April 2008
Chapter 1 Shelf and FMEC Hardware
1.8 Fiber Management
1.8 Fiber Management
The jumper routing fins are designed to route fiber jumpers out of both sides of the shelf. Slots 1 to 6
exit to the left, and Slots 12 to 17 exit to the right. Figure 1-8 shows fibers routed from cards in the left
slots, down through the fins, then exiting out the fiber channel to the left. The maximum capacity of the
fiber routing channel depends on the size of the fiber jumpers.
Figure 1-8 Fiber Capacity
Table 1-3 provides the maximum capacity of the fiber channel for one side of a shelf, depending on fiber
size and number of Ethernet cables running through that fiber channel.
Plan your fiber size according to the number of cards/ports installed in each side of the shelf. For
example, if your port combination requires 36 fibers, 3 mm (0.11 inch) fiber is adequate. If your port
combination requires 68 fibers, you must use 2 mm (0.07 inch) or smaller fibers.
Fiber guides
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Table 1-3 Fiber Channel Capacity (One Side of the Shelf)
Fiber Diameter
Maximum Number of Fibers Exiting Each Side
No Ethernet Cables One Ethernet Cable Two Ethernet Cables
1.6 mm (0.6 inch) 126 110 94
2 mm (0.7 inch) 80 70 60
3 mm (0.11 inch) 36 31 26