Change 1, 30 November 1996
period. Pathways should be designed for the life of the building.
Premature recabling is time consuming, expensive, and disruptive to
both users and system operations. To correctly size the cabling
infrastructure, the RCDD is encouraged to select one of the various
building usage types listed below prior to computing the quantity and
types of cables required to support each workstation and the type and
size of the horizontal pathway required to run the cables from the
workstation to the telecommunications closets. This information will
also be used in later subsections to size the telecommunications
closets, backbone cables, pathways, and entrance facilities.
Administrative. Buildings being constructed or refurbished
to house administrative personnel will most likely contain a
combination of walled offices, usually adjacent to the windows, for
supervisory personnel, conference facilities, and open bay areas
toward the center of the floor plan. These open bays are commonly
configured with modular furniture. Occupants of these buildings
require general telecommunications support to each workstation for
voice and LAN connectivity and specific telecommunications support to
designated areas, as required to support the major claimant terminal
equipment. Additional jacks not associated with a particular
workstation will be required in common areas for the termination of
facsimile machines, printers, and various terminal equipment.
Activities which employ optical scanning and storage methods for
large data files may require fiber optic cable to the workstations in
designated areas for high-speed file retrieval. At a minimum, each
walled office should contain a two-port faceplate, configured in
accordance with EIA/TIA-568, for each occupant. At a minimum, it
should contain an eight-pin modular voice jack, which is either CAT 3
or CAT 5 and either an eight-pin CAT 5 modular data jack or a duplex
fiber optic data jack. The major claimant may specify a second or
third data jack dependent upon anticipated LAN configurations.
Installation of both CAT 5 UTP and fiber optic data cable to the
workstation is allowed when required for compatibility with customer
terminal equipment. When the major claimants' inputs are either not
available or insufficient for detailed engineering, open bay areas
should be engineered to provide for one workstation for every 10 sq.
m (100 sq. ft.) of usable floor space. Each modular workstation
should be equipped with one faceplate which is to be configured in
accordance with the EIA/TIA 568.