Calvert Wire & Cable: TIA/EIA-568-A Standards

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TIA/EIA-568-A Standards

TIA/EIA-568-A is a commercial building telecommunications cabling standard

Planning and installing of structured wiring systems
Cable specification, performance and installation requirements
Physical star topology
Cabling divisions
- Horizontal
- Backbone

Horizontal

Cabling installed between the telecommunications closet and wall outlet
Maximum distance of 295' from closet to outlet with 10' for workstation jumpers & 23' for cross connect jumpers and patch cords
Two wall outlets per workstation

One cable must be 4 pair UTP
Other cable can be any on of the recognized media

Recognized media

4 pair, 100 Ohm UTP
2 pair, 150 Ohm STPA
50 Ohm Coax, not recommended for new installations
62.5 µ Fiber

Backbone

Cabling between equipment rooms, entrance facilities and telecommunications closet
Conventionally, vertical shaft cable; but also used in a Star Topology in a campus type network
Recognized media

100 Ohm Multipair UTP
150 Ohm STPA
50 Ohm Coax, not recommended for new installations
62.5 µm Fiber
Single-mode Fiber

The information provided in the resources section is intended for reference only. There is no guarantee, written or implied, regarding the accuracy of the information provided.

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