Twisted Pair Cable Specifications
The cables that are supported must meet the following specifications:
❑22, 24, or 26 gauge twisted pair cable
❑80 to 150 ohm impedance
❑Minimum of 2 pairs
A pair is usually a solid color wire twisted with a striped wire of the same color.
Table
Table A-6. IBM Twisted Pair Cable Specifications
IBM Type | No. of | AWG | Shielding | Nominal | ||
Pairs | Impedance | |||||
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1 | 2 | 22 (solid | Data pairs individually | 150 ohms | ||
| bare | foil shielded plus 65% |
|
| ||
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| copper) | tinned copper braid |
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| |
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|
|
|
| |
2 | 6 | 22 (solid | Data pairs individually | Data | 150 | |
(data 2) | bare | foil shielded plus 65% | ohms |
| ||
| (voice 4) | copper) | tinned copper braid. | Voice | 105 | |
|
|
| Voice pairs | ohms |
| |
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| ||
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|
|
| ||
6 | 2 | 26 (7x34 | Overall foil shielded | 150 ohms | ||
| bare | pairs plus 65% tinned |
|
| ||
|
| copper) | copper braid |
|
| |
|
|
|
|
| ||
9 (plenum) | 2 | 26 (7x34 | Individually foil | 150 ohms | ||
|
| bare | shielded plus 65% |
|
| |
|
| copper) | tinned copper braid |
|
| |
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| |
