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Change 1, 30 November 1996
Approach.  The communications design process must begin
with an analysis of the user workstations.  Their number and
configurations determine the amount and type of horizontal cables to
be pulled, either through embedded floor ducts or through the
ceiling, from the workstation outlets to the serving
telecommunications closets.  This information will also be used to
determine the locations and sizes of the telecommunications closets
and the composition and size of the backbone and entrance facilities.
User Workstation Requirements
Workstation Capabilities.  A workstation is defined as the
place, such as a desk or fixed position, where an employee performs
his or her daily duties.  It consists of a voice instrument and a
personal computer (PC) or terminal, as shown in Figure 3.
Workstations, whether within a walled office or an open bay area,
will be provided with voice access to the resident network via a
unique telephone number.  This is referred to as the "single line
concept."  Workstations will also be provided with connectivity to
the LAN for access to the applications, utilities, and files resident
on the network server.  It is the responsibility of the RCDD to
ensure that cabling and support structures required to connect the
workstation via intermediate telecommunications closets to the
equipment room and building entrance facility are in accordance with
applicable standards.
Cables to the Workstation.  The voice and data station
cables leaving the workstation are connected to the building
horizontal cabling system by means of a faceplate configured with the
appropriate voice and data modular inserts.  A typical faceplate
configuration is shown in Figure 4.  The faceplate should be flush
mounted on the wall rather than surface mounted wherever possible.
Faceplates specifically designed for installation in the baseplate of
modular furniture are available for open bay areas.  See Figure 5.
Unshielded Twisted Pair (UTP).  Four pair, 24 AWG, 100 ohm,
UTP is the preferred media for bringing voice and data to the
workstation.  The two categories of UTP cable approved for general
use are categories (CAT's) 3 and 5.  CAT 3 cable is manufactured to
specifications that will support voice and data at operating rates
not to exceed 16 MHZ.  CAT 3 components are tested to 16 MHZ but are

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