A-11
9H423-26 Cabling Requirements
Why are CAT 5 Connectors Necessary for 100BASE-TX?
Similar to the UTP cable itself, the connector hardware plays an important role in
the overall performance of the assembly. If an electrical signal travels through a
Category 5 cable with little attenuation and then meets an inferior connector, the
signal will presently be degraded due to the connector. It is crucial that the mating
connector hardware be of the same or higher category classification. In other
words, a Category 5 Cable should link with a Category 5 connector for 100 Mbps
rates. Thus consequently, certain restrictions and limits are placed upon the
connecting hardware and its installation as well to assure minimal effects on cable
performance, as listed below:
•
Attenuation - Attenuation here refers to the signal power loss due to the
connecting hardware. Refer to Table A-7.
•
Near End Crosstalk (NEXT) Loss - The NEXT applies to signal coupling from
one pair of metal pins in a connector to another. It is measured with short
lengths of 100
Ω
twisted pair test leads terminated to the connector under test.
Refer to Table A-8.
Table A-7. Connecting Hardware Attenuation for 100
Ω
UTP Cable
Freq (MHz)
CAT 3 (dB)
CAT 4 (dB)
CAT 5 (dB)
1
0.4
0.1
0.1
4
0.4
0.1
0.1
8
0.4
0.1
0.1
10
0.4
0.1
0.1
16
0.4
0.2
0.2
20
-
0.2
0.2
25
-
-
0.2
31.25
-
-
0.2
62.5
-
-
0.3
100
-
-
0.4
Summary of Contents for SmartSwitch 9000
Page 1: ...SmartSwitch 9000 9H423 26 User s Guide 9032242 02 ...
Page 2: ......
Page 30: ...Operation 3 10 ...
Page 34: ...LANVIEW LEDs 4 4 ...
Page 38: ...Specifications 5 4 ...
