Mixed Cable Types - Cabletron Systems TRMIM 24A TRMIM-24A User Manual

REQUIREMENTS/SPECIFICATIONS

2.1.3 Mixed 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)
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
26.4 meters of Type 6 (for patch panel and wall jack
connections)
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6.6 meters (Types 6, 9)