3Com NETBuilder SI, Using Manual

Page: 166 / 212

166 A
PPENDIX
D: C
ONNECTORS AND
C
ABLES
Cabling Standards
Cabling should be installed in accordance with the following standards:
■
EIA/TIA-568 – Commercial building telecommunications wiring
standard
■
TSB-36 – Additional cable specifications for unshielded twisted pair
cables
■
IBM cabling guidelines
100BASE-TX Cabling Table 22 lists supported 100BASE-TX cable types and emissions classes.
The three types of Fast Ethernet interfaces are:
■
TX — Runs over Category 5 UTP and Category 5 shielded UTP.
■
FX — Runs over fiber. FX does not connect to the SuperStack II
NETBuilder SI bridge/router, but you can use FX in your network
between appropriate devices.
■
T4 — Runs over Category 3 or better UTP or shielded UTP. T4 does
not connect to the SuperStack II NETBuilder SI bridge/router, but you
can use T4 in your network between appropriate devices.
Follow the steps in the next section to design a valid Fast Ethernet
network.
Creating a Valid Network
A Fast Ethernet network consists of collision domain diameters formed by
cabling and/or repeaters between two DTE devices. A DTE device is a
bridge/router, switch, or end station that contains a media access
controller (MAC). Repeaters usually do not contain a MAC.
Table 22 Cable Support and Emissions Compliance
Emissions Compliance *
* Shielding of all cable types should be terminated 360º at the cable plug.
Cable Type Connectors
FCC Class A
VCCI Class A EN55022 Class B
VDE Class B
Category 5 UTP Category 5 RJ-45
(including jacks) Yes No
Category 5 shielded UTP Category 5 RJ-45
(including jacks)
Yes Yes