Appendix
I. ANSI/TIA/EIA-568-A PLUG & Twisted-pair Cable
The IEE802.3ab Standards permits the use of category 5 or better
balanced cable pairs, installed according to ANSI/EIA-568-A. This
appendix provides pinout and brief information for the CAT5
unshielded twisted pair cables
II. EIA568A pin assignment:
Pin Number Assignment
Data Pair 3 +
Data Pair 3 -
Data Pair 2 +
Data Pair 2 -
Data Pair 1 +
Data pair 1 -
Data Pair 4 +
Data Pair 4 -
III. Recommend CAT5 UTP specifications
Physical:
FR-PVC cable construction
Cable Type: 4-pair unshielded-twisted pair solid copper
Conductors: 24 AWG, solid bare annealed copper
Operating temperature: -20 0C to +75 0C
Electrical:
Impedance: 100 +15 %
Near-End Cross-talk: 38dB @ 100 MHz
Attenuation: 22 dB/100 m typical @ 100 MHz
Maximum DC resistance: 9.38 /100 m (24 AWG) at 20 C
Maximum DC insulation resistance: 150M /km
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