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IBM 8265: Planning and Site Preparation Guide
Optical Power Loss Through Patch Panels
In fiber optic networks, patch panels are often used to allow for network expansion
and topological changes. In an ATM network, a patch panel consists of a pair of
female-to-female bulkhead barrel connectors which connect to the male fiber
connectors from the media module port.
The optical power loss through a patch panel includes the loss resulting from the two
connectors and the bulkhead. Table 23 shows the ranges and typical amounts of
power loss for different types of patch panels.
when calculating the total power loss for an ATM connection, be sure to use the
highest value in the range given in the Power Loss column. In this way, your
calculation covers a “worst case” scenario.
Table 23. Optical Power Loss per Patch Panel
Type of Patch Panel
Power Loss (dB/km)
Typical Loss (dB/km)
SC to MIC
0.1 to 1.0
0.6
ST to SC
0.1 to 1.0
0.6
SC to SC
0.1 to 1.0
0.6
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