Black Box DESKTOP TELCO Spezifikationen PDF herunterladen (Seite 20)

Consolidation

point

Horizontal cabling

Telecommunications room

horizontal cross-connect

To equipment

Work area

cables

Open office area

Consolidation Point

To equipment

Open office area

Horizontal cabling

Black Box Guide to Structured Cabling

Section NameSection Name

Structured Cabling System

Open office cabling.

If you have an open office with lots of modular

furniture and anticipate lots of MACs, the TIA has

specified two horizontal cabling configurations for

you: the MUTOA and the Consolidation Point. Both

will enable you to keep your horizontal cabling

intact when your open office layout is changed.

Open office cabling is the only exception you’ll

find to the 5-meter rule for work area cables.

Open Office Horizontal Cabling Distances

Work Area, Patch, and

Horizontal Cable Maximum Work Area Equipment Cord Maximum

Length Cable Length (24 AWG) Combined Length

90 m (295.3 ft.) 5 m (16.4 ft.) 10 m (32.8 ft.)

85 m (278.9 ft.) 9 m (29.5 ft.) 14 m (45.9 ft.)

80 m (262.5 ft.) 13 m (42.6 ft.) 18 m (59.1 ft.)

75 m (246.1 ft.) 17 m (55.7 ft.) 22 m (72.1 ft.)

70 m (229.6 ft.) 22 m (72.1 ft.) 27 m (88.6 ft.)

MUTOA (Multiuser Telecommunications Outlet Assembly).

The MUTOA enables the terminations of multiple

horizontal cables in a common, permanent location,

such as a column, wall, or permanent furniture, close

to a cluster of work areas. Guidelines include:

• Locate multi-user telecommunications outlets

in a permanent location.

• Multi-user telecommunications outlets shall

not be installed in the ceiling.

• The maximum cable length is 20 meters (65.6 ft.).

• A maximum of 12 work areas can be served.

• Uniquely identify work area cables on each end.

Consolidation point.

The Consolidation Point (CP) is a straight-through

interconnection point in the horizontal cabling.

It provides another option for open office cabling

and is ideal for work areas that are frequently

reconfigured, but not as frequently as a MUTOA.

Specifications include:

• Only one CP is allowed per horizontal run

between the work area and telecommunications

room. Cross-connection between the cables

is not allowed.

• A CP should not be more than 15 meters (49.2 ft.)

from the telecommunications room.

• A CP can serve a maximum of 12 work areas.

Centralized fiber optic cabling.

Centralized fiber optic cabling, Annex A to the

TIA/EIA-568-B.1, gives you recommendations for

designing a fiber-to-the-desktop system. It centralizes

the fiber electronics instead of using electronics on

different floors. Recommendations include:

• To connect the fiber from the work area to the

equipment room, you can use either a splice or

interconnect in the telecommunications room.

• The distance for the total channel is 300 meters

(984.3 ft.), including the horizontal, intrabuilding

backbone, and patch cords.

• Fiber can be pulled through the telecommunications

room. The distance is limited to 90 meters (295.3 ft.).

• Cable can be 50- or 62.5-micron fiber.

• Allow for slack and sufficient space for the

addition and removal of cable, and conversion

to a full cross-connect system.

Work area

cables

MUTOA

Telecommunications room

horizontal cross-connect

NOTE: The maximum length for a work area cable is 22 meters (72.1 ft).

For fiber cable, any combination of horizontal, work area, patch,

and equipment cables may not exceed 100 meters (328 ft).

MUTOA

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