TIA/EIA-568-A Standards

Network standard: TIA/EIA-56-A
TIA/EIA-568-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 µm 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,um Fiber
- Single mode Fiber