• System Documentation
Document even the smallest systems to allow for additions, troubleshooting, and
equipment moves. Documentation includes producing a physical plan of the
system that maps out the location of each device and the wiring between each.
Implement password protection schemes on each workstation (and server, if
applicable) to prevent unauthorized use of the application software or to prevent
unauthorized access to critical data files. Implement a procedure where unique
user passwords are created and stored in a central, secure location.
Deploy procedures to change passwords at regular intervals and to remove the
passwords for users who no longer have access to the network.
• Backups
Roofs leak, pipes burst, hard disks fail, lightning strikes, and sometimes it even
strikes twice. Any number of sources can cause the loss or corruptions of data and
application files. Backing up system data and totals on a regular basis and storing
them in a safe and secure place is a critical part of Network Administration, and
speeds up the recovery process in the event something does go wrong.
Develop a procedure that defines when server backups occur, how often they are
performed, and how often backup tapes are rotated and stored. Backup tapes
stored on-site are useless if the building is flooded or burns down. Keeping a
second set of backup tapes secure and offsite is a worthwhile precaution.
Elements of a Structured Cabling System
A structured cabling system divides premise wiring into seven basic elements. Four of
these elements are shown in Structured Cabling Examples section. Each component,
including the fifth, Network Administration, is discussed below.
• Work Area
The work area encompasses all components between the faceplate and Ethernet
based device. This includes the patch cable between the faceplate and Ethernet
device. Each work area is served by a telecommunications closet or wiring closet
on the same floor.
• Horizontal Cabling
This section consists of the cabling between the work area and the
telecommunications closet. This includes the faceplates in the work area, the
cable run to the faceplates or patch panel in the wiring closet.
Horizontal cabling can use UTP or STP cables and connection hardware. The use
of a 110 connect system to terminate horizontal cables at the wall plate and patch
panel is recommended.
The maximum distance for any horizontal cable run is 90 meters (295 ft.)
independent of the cable type. 90 meters allows an additional 10 meters (33 ft.) for
patch cables in the work area and wiring closet.
• Computer Room or Telecommunications Closet
All buildings should include at least one telecommunications or wiring closet that
contains the hardware required to connect the horizontal cable runs from each
work area to the patch panels and hubs. Patch panels are key elements of any
structured cable system. Moves and changes are performed by moving a modular
Chapter 26
Elements of a Structured Cabling System
26-3
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