BUILDING TELECOMMUNICATIONS
DESIGN GUIDELINES
PURPOSE
This document is intended to
serve as a guideline for architectural design as it pertains to
telecommunications infrastructure on the Indiana University Bloomington
Campus. Greater detail is provided in the
Division 25000 Telecommunications Specifications document for the Blooming
Campus
GENERAL
Telecommunications and
computing requirements as described herein for each area have been reviewed and
approved by representatives of the technologies at both the campus and system
levels. However, these requirements are
stated very generally. For this reason
and because of rapid changes in technology, University Information Technology
Services Telecommunications and Networks staff must be actively involved in a
review and advisory capacity from inception through construction. The design architect shall
schedule regular design progress meetings with the University Information
Technology Services Telecommunications Plant representative, a University
Information Technology Services Network representative, and a university
Engineering Services representative. These linkages shall be made through the
University Architect’s Office and through commreq@indiana.edu.
Telecommunication
system herein specified provides for voice, data, video and other low voltage
signaling functions (such as for energy management and security systems)
through twisted pair, fiber optic, and coaxial cable. The system shall provide acceptable outlets for
any telecommunication device, which requires connection to other devices,
networks or information services serving general university needs.
Telecommunication
design shall comply with Federal and State codes, regulations, and standards
with variances adopted as standards by
and other
special codes that may apply.
TOPOLOGY
Horizontal cabling shall be installed in a star
topology, with each work area communications outlet/connector connected to a
horizontal cross-connect in a telecommunications room via the horizontal cable.
Station communications
design is based on ‘one communications outlet per workstation’. Therefore the components selected for an
individual workstation communications outlet should reflect the needs of the
intended and possible future users of a given outlet.
Due to the need to maintain a secure and manageable
campus network, as well as the need to maintain location records of
communication outlets and all equipment associated with them for E911 response
databases, all equipment working from a given communications outlet must be
located in the same room as the outlet. Communications data switching can under
certain circumstances be supplied from an in-room switch hub to individual
stations, or run back to a wiring closet via horizontal cabling (preferred).
In-room hubs are allowed only for lab-type settings or temporary work clusters;
large classrooms should be routed to Telecommunications Rooms. A hub may not serve equipment in more than
one room. Any application of an in-room
hub must be approved prior to design and implementation by the Indiana
University Technology Services (UITS) Network group. Those not approved will not be connected to
the University data network. Further information on this topic may be obtained
at http://www.itpo.iu.edu/IT19.html and http://www.itpo.iu.edu/IT20.html.
MAIN TELECOMMUNICATIONS ROOM
The primary function of the main telecommunications
room is to house the necessary hardware to provide cross connection between the
outside plant cables that enter the building from the campus communication
distribution network and the inside backbone cabling. Room should be sized at a
minimum of 100 sf with no dimension less than 7 feet.
The main telecommunications room may also serve as a
building telecommunications room. If so, then the room should be sized at a
minimum of 200 sf with no dimension less than 10
feet. If additional equipment, such as coaxial cable amplifiers and splitters
are to be house in the room, then additional floor and wall space should be
added according to the space requirements of that equipment and associated
cabling and mechanical requirements.
The design must comply with
ANSI/TIA/EIA-569 standard regarding the requirements and recommendations for
separation of copper telecommunication cabling from sources of electromagnetic
interference.
TELECOMMUNICATIONS ROOM
The primary function of a telecommunications room is
the termination of horizontal and backbone cables to compatible connecting
hardware, as well as splice closures, grounding and bonding facilities, and
protection apparatus where applicable.
A telecommunications room also provides a controlled
environment to house telecommunications equipment such as data networking
electronic equipment, campus video, carrier equipment
and, in the future, Voice Over IP equipment. The telecommunications room
provides for the administration and routing of the equipment cables/cords from
the horizontal cross-connect to the telecommunications equipment.
A telecommunications room should be sized at a
minimum of 100 sf. If additional equipment, such as
coaxial cable amplifiers and splitters are to be house in the room, then
additional floor and wall space should be added according to the space
requirements of that equipment and associated cabling and mechanical
requirements.
The telecommunications room
should be located on the same floor as and centrally located to the work areas
served. In a large building, more than one telecommunications room may be
necessary to keep horizontal cabling runs within the specified lengths.
All telecommunications rooms
must be vertically stacked within multi-floor buildings.
If additional equipment, such as coaxial cable
amplifiers and splitters are to be house in the room, then additional floor and
wall space should be added according to the space requirements of that
equipment and associated cabling and mechanical requirements.
The design must comply with
ANSI/TIA/EIA-569 standard regarding the requirements and recommendations for separation
of copper telecommunication cabling from sources of electromagnetic
interference.
Additional requirements:
·
Minimum
room height: 8'6"; no suspended
ceiling
·
Horizontal
cabling from mechanical termination at the communication outlet to mechanical termination
in the serving equipment room not to exceed 295 ft.
·
Control
of heat and humidity essential, to be maintained between 32oF and
100oF and between 15%RH and 95%RH non-condensing. Current network equipment generates 341.25 btu per 24 data ports installed; design cooling to maximum
number of current and future data ports that can be installed, in addition to
other heat generating equipment to be installed in the telecommunications room.
·
Minimum
door dimensions: 36"w and 80"h
·
Campus
telecommunications personnel shall approve key/locking arrangements;
Telecommunications Room and Main Telecommunications Room key sets should be the
same. Telecommunications Room key cores
shall be included as part of the project.
·
Compact
fluorescent lighting with a minimum of two fixtures; provide duplex outlet(s)
for task lighting
·
Do
not locate near alternating current (AC) switch gear as defined in NEC Article
110 and referenced sections.
·
Two
120v 20 amp circuits with four duplex outlets (surge suppression type) on each
circuit; isolate these feeds from motors, AC switch equipment, lighting
circuits; minimum noise and interference
·
The
riser system (Main Telecommunications Room to each Telephone Room) will contain
Category 3 shielded UTP for voice, fax and modem use; Category 6 data risers
for Network use; fiber optic cable for data and video use; and possibly coaxial
cable for video use. The amount of each
type cannot be stated until the design stage of the riser system.
·
Room
should be clear of mechanicals such as ventilation ducts, water, sewer, or
steam pipes, and high voltage electric
·
4'
x 8' plywood backboard, 3/4" thick, painted with a light colored fire
retardant paint, shall be mounted 4" AFF on all walls.
·
Three
(3) equipment racks with vertical wire management, 7' high and to accommodate
19" bay-mounted equipment in each telecommunications room. Equipment racks must be attached to floor
with an overhead runway to a wall.
Additionally there should be a 12” cable runway mounted to top of equipment
racks and the wall where the copper terminations are installed. Equipment racks must be attached to floor
with an overhead runway to a wall. All
equipment racks and raceways shall be bonded per NEC.
·
Cable
tray above frame to accommodate cabling to the plywood backboard; cable tray to
surround room at a minimum height of 7' 2"AFF from the bottom of the tray,
and with a minimum clearance of 12” above the tray; cable tray to be 12"
by 5" ladder type (with water falls at cable exit points) with 18"
tray extending in room. Include a
section of 12" ladder rack extending from the cable tray to each
individual equipment rack
·
Outlet
boxes 4" x 4" with 5/8" 2-gang plaster ring connected to 1"
conduit stubbed out to within 3" above cable tray
·
A
TGB (Telecommunications Ground Busbar) shall be
located in each Telecommunications Room and shall be tied back to the TMGB
(Telecommunication Main Busbar located in Main
Telecommunications Room) with a minimum of a number 6 copper bonding conductor
TBB (Telecommunications Bonding Backbone). The minimum dimensions of the TGB
are .25” thick, 2” wide, and variable length. The
minimum dimensions for the TMGB is .25” thick, 4” wide and variable length.
Both should be insulated from their support.
PATHWAYS
The size
of the telecommunications raceway system and station device box are
defined in the specifications and are such that they will accommodate all of
the telecommunication services available.
The pathways and spaces
shall be designed and installed to support horizontal cabling in accordance
with the requirements of ANSI/TIA/EIA-569-A.
BACKBONE CABLING
Cabling from the Main
Telecommunications Room to each Telecommunications Room is considered as riser
cable.
Splices in backbone cable runs
are not permitted. Wiring must be
continuous from connecting block to connecting block.
The intra-building cabling
and the riser cabling shall be in agreement with ANSI/TIA/EIA-568 Category 3
requirements.
HORIZONTAL CABLING
The horizontal cabling is the portion of the telecommunications
cabling system that extends from the work area telecommunications
outlet/connector to the horizontal cross-connect in the telecommunications
room. The horizontal cabling includes horizontal cables, telecommunications
outlet/connectors in the work area, and mechanical terminations.
In addition to satisfying today's telecommunications
requirements, the horizontal cabling should be planned to reduce on-going
maintenance and relocation. It should also accommodate future equipment and
service changes. After construction of the building, the horizontal cabling is
often much less accessible than the backbone cabling. The time, effort, and
skills required for changes can be extremely high. In addition, access to the
horizontal cabling frequently causes disruption to occupants and their work.
These factors make the choice and layout of horizontal cable types very
important to the design of the building cabling. Consideration should be given
to accommodating a diversity of user applications in order to reduce or
eliminate the probability of requiring changes to the horizontal cabling as
user needs evolve.
The horizontal distance is the cable length from the
mechanical termination of the media at the horizontal cross-connect in the
telecommunications room to the terminations on the telecommunications
outlet/connector in the work area. The maximum horizontal cable distance shall
be 90 m (295 ft), independent of media type. Any horizontal station wiring run
longer than this will not be accepted by the University. Splices in horizontal
cable runs are not permitted. Wiring
must be continuous from outlet to connecting block.
COMMUNICATION OUTLETS
A communication outlet as
described below and used in this document is defined as "providing access
to all available communication media:
twisted pair, coaxial cable, and in the future fiber. Thus voice and data are the basics of an
outlet; if optional video and fiber optic services are required, they shall be
so indicated in individual room or area descriptions.
The maximum horizontal cable
length is based on a maximum length of 5 m (16 ft) of work area cord. Therefore no communication outlet will be
installed such that the intended workstation or device cannot be reasonably
reached by a 16 ft cord.
Communications outlet
assemblies shall be located in fully accessible, permanent locations such as
building columns and permanent walls. Multi-user telecommunications outlet
assemblies shall not be located in ceiling spaces or any obstructed area.
Gang assemblies will require
2-1/8” deep boxes to accommodate the jack assemblies and bending radius of
horizontal wiring.
Communications Outlet Types at IUB
STANDARD JACK: One Category
5 station cable terminated to one (1) Category 5 RJ-45 jack for voice, and one
Category 6 station cable terminated on one (1) Category 6 RJ-45 jack for data
in a single gang configuration installed at the same height as 120 volt AC
outlets (normally 18" above finished floor).
Advanced User Jack: One Category
5 station cable split between two (2) Category 5 RJ-45 jacks for voice, and two
Category 6 station cables terminated on two (2) Category 6 RJ-45 jacks for data
in a single gang configuration installed at the same height as 120 volt AC
outlets (normally 18" above finished floor).
ATM Jack: Two Category
5 station cables terminated on two (2) Category 5 RJ-45 jacks in a surface
mount box.
Card Reader Jack: One Category
5 station cable terminated to one (1) Category 5 RJ-45 jack for voice in a
single gang configuration (no data).
Classroom Jack: One
Category 5 station cable terminated on one (1) Category 5 RJ-45 jack for voice,
four Category 6 station cables terminated on four (4) Category 6 RJ-45 jacks
for data, and one RG-6 coax with “F” connector termination, in a triple gang configuration
(one gang for voice-data, one gang for coax, and one blank gang for future
media).
Data-Only Jack: One
or more Category 6 station cables terminated on individual Category 6 RJ-45
jacks for data. The number of RJ-45
connectors and gang-size configuration must be determined for individual
applications; more than one data-only configuration is likely when classrooms,
work areas, and offices are contained in the same building.
Elevator Phone Jack: One Category
5 station cable terminated to an RJ-11 or RJ-45 surface mount biscuit jack,
mounted in outlet box adjacent to elevator control box.
Emergency Phone Jack: One Category
5 station cable (inside building) or one multi-pair buried drop (outside,
protected) terminated on an RJ-11 or RJ-45 surface mount biscuit jack, mounted
inside of phone base.
Multiple User Jack: Various
configurations are possible for special concentrations of users. Consult with UITS Telecommunications for
special applications and designs.
Payphone Jack: One Category
5 station cable to be terminated directly to payphone equipment. A non-ADA
compliant pay telephone jack requirements are the same as for a wall mounted
telephone except the outlet box is positioned 48" A.F.F. to the center of
the outlet box. The
Security Jack: One Category
5 station cable terminated on one (1) RJ-31X jack for voice, and one Category 6
station cable terminated on one (1) Category 6 RJ-45 jack for data in a single
gang configuration. This configuration
is for Ademco alarms.
Wall Jack: One
Category 5 station cable terminated on one (1) RJ-45 jack for voice. Wall mounted telephones require a special
wall telephone jack that provides mounting lugs for the telephone and an eight
position jack. The outlet box for this
installation is a 2 gang box with a single gang plaster ring and will be
positioned 54" A.F.F. to the center of the outlet box.
DESIGN DRAWINGS
Design drawings shall
include, but not be limited to:
Backbone cable routing diagrams
Backbone cable schematic diagrams, including cable sizes
Telecommunication room locations
Telecommunication room layouts
Telecommunication room details
Conduit / cable tray routing, elevations in relation to
other mechanicals
and
building structures, sizes, and pull box and access point locations
Other supporting structures for telecommunications cabling
Grounding schematic for telecommunications rooms
Last updated: September
10, 2002
URL: http://www.indiana.edu/~classrms/telecomguidelines.html
Comments to: UITS
Copyright 2002-2003, the Trustees of Indiana
University