Rj Connector Standards - IBM 5500 Operational, Installation, And Maintenance Manual

Figure 72: Electrical Specifications for Cables
Wire Type
Wire Size
Next dB @ 1000ft
Nominal Impedance ohms
Maximum Attenuation dB/1000ft
Maximum Capacitance pF/foot

RJ Connector Standards

UTP
Category 3
Unshielded
24 AWG solid
41 @ 1 MGz
32 @ 4 MHz
23 @ 16 MHz
100 ± 15%
6.5 @ 1 MHz
17 @ 4 MHz
40 @ 16 MHZ
20
Note: Although 24 AWG UTP is typically used for network wiring, 22 AWG
is available and might offer lower DC resistance or attenuation. Only use 22
AWG between patch panels or punch down blocks, because most RJ
connectors cannot accommodate 22 AWG wire. For compatibility
information, contact the cable and connector manufacturers.
When using twisted-pair cable, comply with one of the industry cabling
standards. Using a structured wiring standard helps document and
troubleshoot a network.
Industry standards specify the wire pairs and colors of the UTP wire for RJ
connectors. The modules use either 6-position (RJ11) or 8-position modular
plug/jacks (RJ45) for UTP connectivity.The most common wiring standard
now being used with 4-pair RJ45 connectors is the EIA/TIA 568 B. Using this
standard protects your wiring investment, because both 10BaseT Ethernet and
Token Ring networks use the same standard. The configuration for this
standard is shown in Figure 73.
UTP UTP
Category 4 Category 5
Unshielded Unshielded
24 AWG solid 24 AWG solid
56 @ 1 MHz 62 @ 1 MHz
45 @ 4 MHz 63 @ 4 MHz
38 @ 16 MHz 44 @ 16 MHz
100 ± 15% 100 ± 15%
6.5 @ 1 MHz 6.3 @ 1 MHz
13 @ 4 MHz 13 @ 4 MHz
27 @ 16 MHz 25 @ 16 MHz
17 17
FTP
Shielded
24 AWG solid
62 @ 1 MHz
53 @ 4 MHz
44 @ 16 MHz
100 ± 15%
6.3 @ 1 MHz
13 @ 4 MHz
25 @ 16 MHz
17
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