17.0 Typical Wiring Layout (Data Communications Cabling)
Description
This article is from the Data Communications Cabling FAQ, by Peter Macaulay pmac@fox.nstn.ca with numerous contributions by others.
17.0 Typical Wiring Layout (Data Communications Cabling)
17.1 Wiring Layout
......Wiring Closet.............. ....User Work Area....
[HUB]<=====>[PANEL]+=====+[BLOCK]+==============+[WALL]<=====>[STATION]
Where ...
HUB = concentrator
PANEL = RJ-45 Modular Patch Panel
BLOCK = Telco Splice Block (Typically 25-pair)
Crossconnect: NorTel BIX1A, AT&T 110 and similar crossconnect
blocks accommodate 4-pair, 25-pair or larger cables on the
same mount. The same type of mount can be used for the voice
field as well as data.
Telephone-only (66) blocks are seldom used except for
low-speed data circuits such as are used for IBM 3270 terminals.
The newer types of crossconnect mentioned above cost about the
same and accommodates growth much better. (The standard AT&T 110
and its BIX equivalent are rated at Cat 5).
LOBE CABLE = Cable run from user wall plate to wiring closet
WALL = User area wall face plate
STATION = User workstation network adapter
=====> = RJ-45 connector
=====+ = Punch down termination (also called an insulation-
displacement/displacing connector, or IDC).
17.2 Crossconnect Field Colors
The color of label used on a crossconnect field identifies the
field's function. The cabling administration standard (CSA T-528
& EIA-606) lists the colors and functions as:
Blue Horizontal voice cables
Brown Interbuilding backbone
Gray Second-level backbone
Green Network connections & auxiliary circuits
Orange Demarcation point, telephone cable from Central Office
Purple First-level backbone
Red Key-type telephone systems
Silver or
White Horizontal data cables, computer & PBX equipment
Yellow Auxiliary, maintenance & security alarms
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