3 mixed cable types – Cabletron Systems TRXI-24 User Manual
Page 17
REQUIREMENTS/SPECIFICATIONS
Page 2-6
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)
≈
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
|
|
26.4 meters of Type 6 (for patch panel and wall jack
connections)