Black Box DESKTOP TELCO Especificaciones descargar pdf (Pagina 19)

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Structured Cabling System

4-pair, 100-ohm,

solid-conductor UTP cable

2- or 4-strand, 50- or

62.5-micron fiber optic cable

Small-form factor connectors

such as the LC, MT-RJ, and VF-45

8-wire RJ-45

Maximum horizontal distances.

• Horizontal run: 90 meters (295.3 ft.) from the

telecommunications outlet to the horizontal

cross-connect.

• Work-area patch cord: 5 meters (16.4 ft.).

• Total of work-area and cross-connect patch cords,

equipment cables, jumpers, etc: 10 meters (32.8 ft.).

Recognized media.

Cables

You can use these cables individually or in

combination.

• 4-pair, 100-ohm UTP or ScTP cable (24 AWG,

solid conductors) (EIA/TIA-568-B.2).

• 2-fiber (or more) 50- and 62.5-micron

fiber optic cable (EIA/TIA-568-B.3).

• 150-ohm shielded twisted-pair cable

is recognized, but not recommended.

Hybrid cables (multiple cable types in one

sheath) are allowed, provided each individual cable

is recognized and meets the transmission and color-

coding requirements for that cable.

For copper horizontal runs, use solid-conductor

cable. Use stranded conductor cable for the patch

cords. Make sure your cables are marked with

the correct performance category. And match

performance categories of the channel equipment,

such as jacks, patch cords, patch panels, etc.

This ensures category performance.

Connectors

• 8-position modular jack and plug with T568A

or T568B pinning. See page 21.

• SC and ST

fiber connectors.

• Small form-factor fiber connectors.

accommodate bend radius and fill ratios? What

are fire and building code regulations? Are there

physical barriers or environmental factors, such as

seismic planning or water levels? You get the idea.

Documentation. Plan on thoroughly labeling and

documenting all connections in the telecommunica-

tions room and at the workstation outlet.

EMI. Take into account any areas of high EMI,

such as near elevators, motors, and other equipment.

Horizontal topology.

The following are highlights of the TIA/EIA-568-

B.1 specifications.

• The horizontal system shall (remember that

“shall” means required) be installed in a star

topology.

• Each work-area telecommunications outlet shall

be connected to the horizontal cross-connect

in the telecommunications room.

• The telecommunications room should

be on the same floor as the work area.

• Bridge taps and splices shall not be installed

for copper cable.

• No more than one transition point or

consolidation point shall be installed.

(The exception comes later.)

• Electrical components shall not be installed as

part of the horizontal cabling. No application-

specific components can go there either. They

can go next to the outlets or cross-connects.

• A minimum of two telecommunications

outlets shall be installed for each work area.

One should be at least CAT3 or higher for voice.

The other should be CAT5e or higher for data.

You can add more if you want.

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Black Box DESKTOP TELCO Especificaciones Pagina 19

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