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86 Cards in this Set
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Chapter 3 defines guidelines for the following telecommunications spaces:
(3-1) |
Telecommunications enclosure (TE) Telecommunications room (TR) Equipment room (ER) Entrance facility (EF) |
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Acoustic noise levels in telecommunications spaces should be kept to a minimum by locating noise generating equipment where?
(3-2) |
Outside the telecommunications spaces. Noise generating equipment includes photocopy machines, high speed printers, mechanical equipment. |
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Telecommunications cables should be separated from possible sources for what kind of interference?
(3-3) |
EMI and RFI |
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The minimum ceiling height for a telecommunications space should be:
(3-4) |
8 feet; with consideration given to 10 feet |
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How much clearance, unobstructed space should be provided for the installation and maintenance of all cabling and equipment mounted on walls, racks, cabinets?
(3-5) |
1 m (3.28 feet) |
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How far off the wall should the wall mounted equipment be?
(3-5) |
6 inches (150 mm) |
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How much space should be allocated for each equipment rack, cabinet, or enclosure?
(3-5) |
1 m x 1 m x 2.3 m (3.28 ft x 3.28 ft x 7.5 ft) |
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How much space should be allocated for side clearance of equipment?
(3-5) |
12 inches (300 mm) |
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If possible, sleeves, slots, or conduits should be located such that the cable terminations on the wall can be performed from what direction?
(3-6) |
left to right |
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Trays and conduit should protrude a distance of _______ inches into a room at a height of _______ feet.
(3-6) |
1.0; 8.0 |
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Sleeves should not be left open after an installation. All sleeves must be sealed with what?
(3-6) |
Firestopping |
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How many sleeves are recommended for backbone cabling to serve a TR, ER, or EF?
(3-6) |
Four 4 inch sleeves |
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Multiple telecommunications spaces on the same floor shall be interconnected with what?
(3-6) |
a minimum of one 3 inch conduit or equivalent raceway or pathway. |
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Doorways that are planned for use during delivery shall have fully opening doors. The door dimensions should be:
(3-7) |
3 feet by 6.5 feet. ER should have a double door, 6 feet by 7 feet. |
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True or False: Doors should have the same fire rating as the walls in the room.
(3-7) |
True |
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Why are doorsills not recommended in telecommunications spaces?
(3-7) |
They impede the movement of equipment. Removable center posts are permitted if required. |
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Dust and static electricity should be avoided by:
(3-7) |
Installing antistatic floor tile or grounded floor tiles and mats bonded to ground using manufacturer recommended hardware. If carpet is installed, it should be antistatic |
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Telecommunications spaces should include how many power outlets?
(3-8) |
a minimum of two dedicated non-switched AC receptacles on individual branch circuits. |
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Duplex or quad receptacles should be placed at 6 inches AFF and at what distance around the perimeter wall?
(3-8) |
6 feet |
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True or False: a dedicated power panel for the telecommunications space is not recommended.
(3-8) |
False: dedicated power panels are recommended. |
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HVAC systems should provide continuous and dedicated environmental control for what time periods?
(3-9) |
365 days, 24 hours a day |
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HVAC systems should maintain what kind of air pressure and support how many air changes an hour in a telecommunications space?
(3-9) |
positive pressure; one air change an hour |
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HVAC systems should maintain what level of humidity and temperature?
(3-9) |
levels indicated by the equipment manufacturer |
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Where should portable fire extinguishers be mounted in a telecommunications space?
(3-10) |
as close to the entrance as possible |
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What should be installed to prevent accidental tripping/operation of sprinkler heads?
(3-10) |
sprinkler head cages |
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Wall linings should be covered with the following:
(3-10) |
two coats of fire retardant white paint (or other light colored finish) |
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True or False: Telecommunications spaces should be located above any threat of flooding.
(3-11) |
True; locations that are below or adjacent to restrooms, kitchens, or other water areas should be avoided. |
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All equipment and cable shields should be bonded to the following:
(3-11) |
The telecommunications space bonding and grounding infrastructure |
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Where should light switches be locate in the telecommunications space?
(3-12) |
Near the entrance; dimmers and vacancy sensor are not recommended |
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What is the recommended light levels to the point of termination in a telecommunications space?
(3-12) |
50 footcandles |
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At what minimum height should light fixtures be mounted?
(3-12) |
8.5 feet.
Recommended minimum room height is 8 feet |
0.5 feet higher than recommended room height
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Telecommunications spaces shall not be shared with the following spaces:
(3-12) |
- Building or custodial services - load-bearing walls
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Telecommunications space sizing guidelines are based on a distributing horizontal cabling to individual workspaces that are how large in area?
(3-14) |
100 square feet
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If the serving area is 5000 square feet or less, the interior dimensions of the telecommunications space should be:
(3-14) |
10 feet by 8 feet |
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If the serving area is between 5000 square feet and 8000 square feet, the interior dimensions of the telecommunications space should be:
(3-14) |
10 feet by 9 feet |
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If the serving area is between 8000 square feet and 10000 square feet, the interior dimensions of the telecommunications space should be:
(3-14) |
10 feet by 11 feet |
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If the building is smaller than 5000 square feet, the area may be served by the following:
(3-15) |
A shallow room |
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If the building is smaller than 1000 square feet, the are may be served by the following:
(3-15) |
Wall cabinets self contained cabinets enclosed cabinets |
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Walk in rooms shall have the followings dimensions:
(3-15) |
4.5 feet by 4.5 feet |
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Shallow rooms shall have the following dimensions:
(3-15) |
8.5 feet by 2 feet |
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If the minimum sizing recommendations cannot be met, a space of 4 feet by 6 feet by 8.5 feet should be provided based on how many terminations?
(3-16) |
240, 4-pair terminations |
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ITS distribution designer should plan for the following:
(3-19) |
A clear space of 5 to 6 inches above and below the top and bottom of connecting hardware |
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Corners of walls result in how much lost space, and make cable distribution ring runs necessary?
(3-19) |
12 inches |
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What are the height and width recommendations for racks, cabinets, or enclosures?
(3-20) |
7 ft by 19 inches |
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EIA/ECA 310-E contains information pertaining to?
(3-20) |
Cabinets, Racks, panels, and associated accessories |
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The ratio of patch panel to horizontal cable manager plus additional cable manager is:
(3-20) |
1 RU to 1 RU to 1 RU |
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Wall linings should have plywood with the following characteristics:
(3-21) |
-AC grade or better, void free (8ft) high |
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Plywood should be kiln dry to reduce moisture to 15 percent to prevent the following:
(3-21) |
Warping |
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Plywood should be mounted to what height?
(3-21) |
8 feet |
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Plywood should be painted on how many sides?
(3-21) |
all sides |
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How do TR and TE differ from ER and EF?
(3-22) |
TR and TE are floor serving or tenant serving versus building or campus serving |
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TR and TE provide an environmentally secure area for installing the following:
(3-22) |
-cables -cross-connects -connecting hardware -telecommunications equipment |
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Describe a TR
(3-23) |
A TR is an enclosed architectural space for housing telecommunications equipment, cable terminations and cross connect cabling |
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Describe a TE
(3-23) |
A TE is a case or housing for telecommunications equipment, cable terminations and cross connect cabling |
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At least one TR or TE serves every building with a minimum of how many per floor?
(3-23) |
One |
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Is there a maximum number or TE or TR a building can have?
(3-23) |
No |
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The primary function of a TR or TE is to house?
(3-24) |
the HC (FD); the TR or TE may also contain the IC, MC, Passive cabling components, and active devices |
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True or False: an EF may also contain the TR
(3-24) |
True |
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What cable length between HC and telecommunications outlet location should not be exceeded?
(3-25) |
295 feet |
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What is recommended if cable length between HC and telecommunications outlet location exceed recommended values?
(3-25) |
multiple TR or ER |
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What should be considered if the usable floor space exceeds 10000 square feet?
(3-25) |
Additional TR |
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A shallow room is best suited for the following:
(3-29) |
splicing terminations |
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TE doors should be hinged or removable. Doors should swing a minimum of how many degrees?
(3-30) |
90 degrees or otherwise provide unobstructed access to the inside of the enclosure |
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TE should have what kind of electrical power?
(3-30) |
one dedicated duplex receptacle. |
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What is the maximum floor area a TE should serve?
(3-31) |
3600 square feet |
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ER may also serve as the following:
(3-33) |
the EF and serve as a TR |
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ER may contain some or all of the following equipment:
(3-34) |
Active equipment Cross-connect facilities BAS and other building system equipment |
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The most common type of backbone cabling/media are:
(3-35) |
- balanced twisted pair - multimode optical fiber - singlemode optical fiber - wireless |
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The design and specifications for an ER shall be based on detailed information about the site, including the following:
(3-36) |
- Customer requirements - Telecommunications pathway locations - AP and SP requirements - Environment/facility conditions and resources - Building requirements |
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Major factors that should be considered when choosing ER location include:
(3-37) |
- Space - Future expansion - Access for delivery - building facilities - AP requirements - proximity to electrical services - sources of EMI - relationship to service entrances - access and proximity to telecommunications pathways - floor loading |
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ER shall have access to backbone pathways. Locations of ER shall be chosen that minimizes the following:
(3-38) |
Size and length of backbone cables, and length of horizontal cable |
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Ideal locations for ER include the following:
(3-37) |
- Tenth floor of a 20 floor building - center of a large single floor building - center of a large campus |
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An ER should have a minimum floor space of what dimensions?
(3-43) |
10 feet by 16 feet |
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What should the ER size be if there are less that 200 work spaces?
(3-45) |
160 square feet |
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Number of work spaces is determined by what method?
(3-45) |
dividing the usable floor space by 100 square feet. If the usable floor space is unknown, deduct 20 percent of the total floor area. |
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Determine the number of BAS devices that will serve through an ER?
(3-45) |
divide the total floor space by 250 square feet. |
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How is the ER size determined?
(3-45) |
multiply the total number of workspaces by 0.75 square feet and BAS devices by 0.25 square feet and sum the two numbers. |
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Typical equipment cabinets require how much space?
(3-46) |
10 square feet for cabinets and an additional 10 square feet for working clearance |
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Cable and pathways entering an ER; how many sleeves are preferred to enter an ER?
(3-51) |
a minimum of four 4 inch conduit with one spare. A total of five 4 inch conduit. |
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ER should be provided with what kind of power?
(3-53) |
an electrical power supply that serves only the ER and terminates in is own electrical panel or backup power distribution equipment. |
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ER should be maintained at what environmental levels?
(3-56) |
64 to 84 degrees with a relative humidity of 60% |
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What is the anticipated heat output per equipment cabinet?
(3-56) |
751 to 5016 BTU |
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HVAC control thermostats should be located in the ER at the following height:
(3-56) |
5 feet AFF |
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To minimize dust and static electricity, what flooring should be installed in an ER?
(3-57) |
smooth surfaces materials such as tile that do not produce dust or static. Carpets are not recommended |
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What is the floor loading for a typical equipment cabinet?
(3-57) |
50 to 250 lbf/ft2 |
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The rating of concentrated loading should be greater than _______ lbf in areas that will support telecommunications equipment. |
2000 lbf (8.9 k-newtons) |
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