Black Box DESKTOP TELCO Spezifikationen PDF herunterladen (Seite 15)

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Cabling

Multimode fiber cable can be used for most

general data and voice applications. Both 50-

and 62.5-micron cable feature the same cladding

diameter of 125 microns, but 50-micron fiber cable

features a smaller core (the light-carrying portion

of the fiber). LED and laser light sources can also

be used with both 50- and 62.5-micron cable.

The big difference between the two is that

50-micron cable provides longer link lengths and/or

higher speeds, particularly in the 850-nm wavelength.

Although both can be used in the same way,

50-micron cable is recommended for backbone,

horizontal, and intrabuilding connections, and

should be considered for any new construction and

installations. There is still a market for 62.5-micron

multimode products though because many buildings

already have multimode cable installed. But it bears

repeating: For new installations, use 50-micron cable.

Multimode fiber cable is traditionally orange.

50-micron fiber cable that’s optimized for 10-Gigabit

applications is aqua.

Single-mode, 8–10-micron cable. Single-mode

cable has a small 8–10-micron glass core and only

one pathway of light. With only a single wavelength

of light passing through its core, single-mode cable

realigns the light toward the center of the core

instead of simply bouncing it off the edge of

the core as multimode does.

Single-mode cable provides 50 times more

distance than multimode cable. Consequently,

single-mode cable is typically used in long-haul

network connections spread out over extended

areas, including cable television and campus

backbone applications. Telcos use it for connections

between switching offices.

Single-mode cable is traditionally yellow.

Specialty fiber cable.

Depending on your application, you may want

to use a specialty fiber cable.

To save money on innerducts and conduit, you

can use a fiber cable with an aluminum interlocking

armor covering an internal plenum jacket. It’s flexible

but extraordinarily strong so you can run this cable

anywhere in your building.

If you need to run cable outdoors, consider an

indoor/outdoor cable that can be pulled anywhere,

between and within buildings. Because of its tough

construction, it doesn’t have to be terminated within

50 feet of the building entrance. Outdoor fiber cable

is typically black.

Both cables are available at blackbox.com.

An aluminum interlocking

armor enables this

fiber cable to be run

anywhere indoors.

This tight-buffered cable

can be run anywhere—

indoors or out.

62.5 µm

125 µm

62.5-micron multimode

50 µm

125 µm

50-micron multimode

8–10 µm

125 µm

8–10-micron single-mode

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