Optical Power Loss Through Jumper Cables
When ATM Workgroup Switchs are installed in patch panel racks, jumper cables are often used to
connect a workgroup switch port to the patch panel. The use of jumper cables in this type of
configuration is recommended in your ATM network because each workgroup switch port regenerates
the optical signal at full strength as it was originally transmitted from the source end system in
the connection.
The total power loss at each jumper cable is shown in Table 17. Note that this value includes the
combined power loss from the two connectors (workgroup switch and patch panel) and the length of the
jumper cable itself.
Table 17. Optical Power Loss per Jumper Cable
Cable Type
Total Loss
By Component
Singlemode
0.75 dB
0.7 (0.35
×
2 connectors)
+
0.05 (cable loss for 100 meters)
Multimode
1.5 dB
1.4 (0.7
×
2 connectors)
+
0.1 (cable loss for 100 meters)
206
IBM 8285 Nways ATM Workgroup Switch:
Installation and User’s Guide
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