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REQUIREMENTS/SPECIFICATIONS
2.1.2STP Cable Specifications For The
The
•IBM Type 1 - Two STP lengths of 22 AWG solid wire for data. Used for the longest cable runs within the walls of buildings.
•IBM Type 2 - Similar to Type 1 data cable, but having four additional UTP lengths of 22 AWG solid wire carried outside of the shield casing. Typically used for voice communication and often used to wire cable runs within the walls of buildings.
•IBM Type 6 - Two STP lengths of 26 AWG stranded wire for data. This type is used in patch panels or to connect devices to/from wall jacks. Attenuation for Type 6 cable is 3/2 x Type 1 cable (66 m of Type 6 =100 meters of Type 1).
•IBM Type 9 - Similar to Type 1, but uses 26 AWG solid wire. Attenuation for Type 9 cable is 3/2 x Type 1 cable
(66 m of Type 9 = 100 meters of Type 1).
Attenuation and Impedance
The attenuation values shown in Table
Table
Frequency | Impedance | Attenuation |
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Types 1 & 2 | 150Ω + 15% |
|
4 MHz | <22 dB/km (6.7 db/1000 ft.) | |
16 MHz | 150Ω + 15% | <45 dB/km (13.7 db/1000 ft.) |
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|
Types 6 & 9 | 150Ω + 15% |
|
4 MHz | <33 dB/km (10 db/1000 ft.) | |
16 MHz | 150Ω + 15% | <66 dB/km (20 db/1000 ft.) |
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