REQUIREMENTS/SPECIFICATIONS
2.1.3Mixed Cable Types
If you mix cable types in your installation, you must compensate for the different cable attenuations. Type 6 and Type 9 cables can be run for only 2/3 the distance of Type 1. This means:
10 meters (Type 1) ≈ 6.6 meters (Types 6, 9)
Example: Maximum Length for Mixed Cabling Installation
-16 Mbps ring speed and 130 stations.
-The building has 60 meters of Type 1 cable in the wall.
-How much Type 6 cable is available to connect the repeater TCU port to the patch panel and the station to the local wall jack?
-Type 6 can only go 2/3 the distance of Type 1.
Solution:
100 meters = maximum cable length if only Type 1 cable is used
[60 meters of Type 1] + [40 meters of Type 1] = max. length
[60 meters of Type 1] + [(.66) x (40 meters) of Type 6] = max. length
26.4meters of Type 6 (for patch panel and wall jack connections)
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