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Types of Shielded Cable
IBM TYPE 1: Traditional 150 Ohm cable includes twisted pairs wrapped in foil and
completed with a metal braid around all conductors and then wrapped with an insulator. However there are a number of negatives about this type of cable:
– Very rigid – Difficult to connectorize
– Not compatible with 100Ω UTP LAN technologies due to size and impedance
CAT-6e FTP: Foil Twisted Pair provided in 100 Ohm with 4 twisted pairs surrounded
by a metallized foil wrapper. The pluses and minuses are:
+ Less rigid… almost as flexible as traditional UTP + Easily connectorized
+ Can be specified to support 10GBASE-T
– Requires careful shield attention during connectorization – Requires careful ground management to prevent loops
Advantages of CAT 6e Bulk Cable and Category 6e Assemblies
CAT 6e FTP: Foil Twisted Pair provided in 100 Ohm with 4 twisted pairs surrounded by a metallized foil wrapper.
+ Less rigid… almost as flexible as traditional UTP
+ Enhanced Shield termination makes it easily connectorized + Enhanced Shield termination provides isolation between devices + Enhanced Shield termination eliminates "ground loops"
+ With FTP, alien next can be reduced to almost zero + With FTP, RJ-45 and field termination can be used
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