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Cabling
Standards: Equipment Rooms and Per-Floor
Telecommunications Room
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Equipment
Rooms (MDF/IDF)
Equipment Rooms are special purpose rooms that
provide space and maintain a suitable operating environment for communications
equipment. Equipment Rooms are generally considered to serve a building,
where Telecommunications Rooms serve one floor or a section of a floor.
The location should be so the room has access to the intra- and inter-backbone
pathway and is accessible for delivery of equipment, away from potential
sources of EMI, away from machinery that causes vibration, and away
from steam pipes, drains, and clean-outs. If the Equipment Room
is on a different floor than the Service and Termination Room, it should
be stacked above or below the Service Entrance and Termination Room.
Wherever possible, the room shall be dedicated
to District’s ITS
Department. The basic requirements for an Equipment Room shall be the
same as those previously indicated for the Service Entrance and Termination
Room, except as follows.
- Required Area: Each Equipment Room shall not be
less than the following size, depending on the total number of voice
and data connection to be served from the equipment room.
- Minimum area is 6' X 6' for a MDF with less than 100 voice and/or
data connections.
- Minimum area is 6' X 8' for a MDF with 100 – 200
voice and/or data connections.
- Minimum area is 8' X 10' for a MDF with 200 to 300 voice and/or data
connections.
- Minimum area is 10’ X 12’ for a MDF with > 300
voice and/or data connections.
- Conduits/Sleeves: Location, number, and size of
conduits, and sleeves between the Service Entrance and Termination
Room, Equipment Rooms, and Telecommunications Rooms will be specified
by ITS during the design phase of the project.
- Telecommunications Rack(s): Install
a 96” high
and 19” wide telecommunications rack, without panels, to support
voice and data network terminations and equipment. Locate the rack(s)
in the room so that there is sufficient space to work behind it for
installation and maintenance. The amount of services required
to support the building may require more than one rack to be installed.
Fasten the rack(s) to the floor and bond the rack or cabinet to the
ground bus. Number and location of the racks or cabinets will be supplied
during the design phase of the project. Install a four-plex electrical
outlet in one or more racks to support a UPS to be located on the floor
within the rack frame. The size and number of the UPS will be determined
during the design phase, along with the size, type and number of electrical
receptacles.
Per-Floor Telecommunications Room (IDF)
A centrally located Telecommunications Room, not shared with other physical
plant systems (or otherwise physically separated from these systems),
shall be provided on each floor of the building wherever possible. A
Telecommunications Room provides the connection point between the building
backbone and horizontal distribution pathways.
The location shall be as close as possible to
the center of the floor it is intended to serve. This is to minimize
the horizontal cable lengths and duplication of electronic equipment.
The basic requirements for a Telecommunications Room shall be the same
as those previously indicated for the Service Entrance and Termination
Room, except as follows.
- Room Locations & Spacing: Maximum distance between
the Telecommunications Room on each floor and a telecommunications
outlet is 295 feet, as measured per the cable pathway.
- There shall be at least one Telecommunications Room per floor.
- The Telecommunications Room shall have a means to access the per-floor
wiring pathways.
- The Telecommunications Rooms should be stacked above each other on
the different floors. If rooms are not stacked, the Telecommunications
Room shall have a means to access the Telecommunications Rooms on the
floor above and below via metal conduits or sleeves.
- Room Area: Each Telecommunications Room shall not
be less than the following size, depending on the total number of voice
and/or data connections being supported.
- Minimum area required for < 100 voice and/or data connections
is 4’ X 4'
- Minimum area required for 100 to 200 voice and/or data connections
is 6' X 8'
- Minimum area required for 200 to 300 voice and/or data connections
is 8' X 10'
- Minimum area required for > 300 voice and/or data connections
is 10’ X 12’
- Conduits: Two 4" conduits shall be installed
between Telecommunications Rooms located on different floors. One 3" conduit
shall be installed between Telecommunication Rooms located on the same
floor. Location of conduits, cable trays, and sleeves shall be coordinated
with ITS staff. Conduits and sleeves shall extend 2" above floor
level or through the wall.
- Electrical: On each wall,
except the wall containing the door, install two A/C 20-amp electrical
four-plex outlets. In the larger rooms, 8’ X 10' and larger,
install three A/C 20 amp electrical four-plex outlets evenly spaced
along each wall.
- Floor Loads: Floors shall be designed to support
2.4 kPA (50 lb'/ft2) minimum.
- Telecommunication Rack(s) and UPS Outlet: Provide
the same as the Equipment Rooms.
- Smoke & Fire Sensors: Each Telecommunications
Room shall contain a smoke/fire sensor as part of the overall building
fire alarm system.
- Cable Management: The ethernet cables will be terminated
in the rack in patch panels with cable management. The specific part
numbers of the patch panels and cable management devices are specified
in this document.
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