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Chapter 3 Flashcards

1
Q

Access Provider (AP)

A

1 .A company (e.g., telephone
company) that provides a circuit
path between a service provider
(SP) and the client user. An AP
also can be the SP.
2. The operator of any facility
that is used to convey
telecommunications signals to
and from a client premises.
TDMM.* Page G-4

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2
Q

ACS

A

Access Control System
An interconnected set of
controllers managing the
entrance and exit of people
through secure areas.
TDMM.* Page G-3

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3
Q

AHJ

A

Authority Having Jurisdiction
The building official, electrical
inspector, fire marshal, or other
individuals or entities
responsible for interpretation
and enforcement of local
building and electrical codes.
TDMM.* Page G-14

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4
Q

BAS

A

Building Automation System
A control system consisting of
hardware (e.g., controllers, optical
fiber cabling, input/output devices)
and a software application or suite
of software applications that
automate the electrical,
mechanical, or other building and
facility subsystems.
TDMM: Page G-24

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5
Q

Demarcation Point
(Demarc or DP)

A

1 .A point where the operational
control or ownership changes.
(TIA)
2. The point of interface between
service providers (SPs) and
client facilities. Also referred to
as minimum point of entry
(MPOE).
TDMM.* Page G-54

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6
Q

EF

A

Entrance Facility
An entrance to a building for both
public and private network service
media, including wireless. This
includes the entrance point (EP) at
the building wall or floor, the
conduit or pathway, and continuing
on to the entrance room or space.
TDMM.* Page 3-52

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7
Q

EP

A

Entrance Point
The point of emergence for
telecommunications cabling
through an exterior wall, a floor,
or from a conduit. (TIA)
TDMM.* Page G-71

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8
Q

ER

A

Equipment Room
An environmentally controlled
centralized space for
telecommunications equipment
that usually houses an MC (CD)
TDMM.* Page 3-28

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9
Q

HC (FD)

A

Horizontal Cross-Connect
(Floor Distributor)
A group of connectors (e.g.,
patch panels, punch-down
blocks) that allow horizontal,
backbone, and equipment
cabling to be cross-connected
with patch cords or jumpers.
TDMM.* Page G-93

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10
Q

IC (BD)

A

Intermediate Cross-Connect
(Building Distributor)
The connection point between a
backbone cable that extends from
the main cross-connect (MC
[campus distributor (CD)] first-level
backbone) and the backbone cable
from the horizontal cross-connect
(HC [floor distributor (FD)] second-
level backbone).
TDMM.* Page G-100

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11
Q

MC (CD)

A

Main Cross-Connect
(Campus Distributor)
The cross-connect normally
located in the (main) equipment
room for cross-connection and
interconnection of entrance
cables, first-level backbone
cables, and equipment cables.
TDMM.* Page G-115

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12
Q

Service Provider (SP)

A

The operator of any service that
furnishes telecommunications
content (transmissions)
delivered over access provider
facilities. (T IA)
TDMM: Page G-173

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13
Q

TE

A

Telecommunications Enclosure
A case or housing for
telecommunications equipment,
cable terminations, and cross-
connect cabling.
TDMM.* Page 3-19

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14
Q

TR

A

Telecommunications Room
An enclosed architectural space
for housing telecommunications
equipment, cable terminations,
and cross-connect cabling.
TDMM.* Page 3-19

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15
Q

How are
telecommunications
spaces defined?

A

As rooms and areas where
telecommunications cabling
systems are terminated, cross
connected, and interconnected
to installed telecommunications
equipment
TDMM.* Page 3-1

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16
Q

Why should a
telecommunications space
that serves multiple
tenants be in a common
space that can be
accessed through a
common corridor or
outside door?

A

This type of access will limit
interruption to the building
tenants. Service for one tenant
will not interrupt the
other tenants.
TDMM: Page 3-1

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17
Q

Who should have access to a
locked telecommunications
space, area, or room?

A

*The owner’s maintenance
personnel
*Building management
*Common key/access control
credential holders
Each tenant
TDMM. Page 3-1

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18
Q

Name 2 strategies to limit
acoustic noise levels in a
telecommunications space.

A

1 .Locate noise-generating
equipment outside the
telecommunications space
whenever possible
2.Specify the use of sound barriers
if sources of unacceptable noise
cannot be located outside the
telecommunications space
TDMM.* Page 3-2

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19
Q

What should be the
minimum ceiling height in a
telecommunications
space?

A

-2.4 m (8 ft) AFF
TDMM.* Page 3-3

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20
Q

What is the recommended ceiling
height to consider using in a
telecommunications space?

A

-3 m (10 ft) AFF
TDMM.* Page 3-3

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21
Q

True or False
Suspended ceilings are
preferred in
telecommunications
spaces.

A

False. Suspended ceilings are
not recommended in
telecommunications spaces
unless they are part of the
air cooling strategy.
TDMM.* Page 3-3

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22
Q

Name 2 potential negative
consequences of installing
excessively tall equipment or
racks in a telecommunications
space.

A

1 .May require special lighting
2.May require wider working
clearances
TDMM.* Page 3-3

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23
Q

Why is it important to
select a ceiling finish
that is light colored?

A

It enhances the room lighting.
TDMM.* Page 3-3

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24
Q

How much clearance
should be provided for the
installation and
maintenance of cabling
that is mounted on a wall?

A

-1 m (3.28 ft)
TDMM.* Page 3-3

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25
What is the minimum recommended depth that should be provided for wall- mounted equipment?
-150 mm (6 in) TDMM.* Page 3-3
26
How much working clearance (front and rear) should be provided around installed equipment?
-1 m (3.23 ft) TDMM.* Page 3-3
27
What is the minimum recommended side clearance when equipment will be mounted in the corners of a telecommunications space?
-300 mm (12 in) TDMM.* Page 3-3
28
True or False If possible, sleeves, slots, and conduits should be located where they permit cable terminations to be performed from left to right.
True. If possible, sleeves, slots, and conduits should be located where they permit cable terminations to be performed from left to right. TDMM.* Page 3-4
29
How far should a cable tray located within the ceiling protrude into a room?
05.4 mm (1 in) to mm (2 in) without a bend TDMM.* Page 3-4
30
How high should a cable tray located within the ceiling be placed when it protrudes into a room?
Above -2.4 m (8 ft) high TDMM.* Page 3-4
31
What is the minimum size and number of sleeves to be used for backbone pathways for a TR, ER or EF?
At least four 103 mm (4 trade size) sleeves TDMM.* Page 3-4
32
How should multiple telecommunications spaces on the same floor be interconnected?
By at least two 103 mm (4 trade size) conduits or a pathway that provides equivalent capacity TDMM.* Page 3-4
33
True or False Doors for telecommunications spaces are permitted to have a lower fire rating than the rest of the room.
False. Doors shall have the same fire rating as the room. TDMM.* Page 3-5
34
What should be the focus of the fire protection system?
Prevention, early warning, and containment TDMM.* Page 3-7
35
Where should light switches be located in telecommunications spaces?
Near the entrance to the space TDMM.* Page 3-9
36
True or False Dimmers and vacancy sensors are recommended for reducing energy consumption in telecommunications spaces.
False. Dimmers and vacancy sensors are not recommended for use in telecommunications spaces. TDMM.* Page 3-9
37
How much light should be provided within the telecommunications space?
-500 lx (46 foot-candles) in the horizontal plane and =200 lx (18.6 foot-candles) in the vertical plane, measured zl m (3.28 ft) AFF in the middle of all aisles between cabinets and racks TDMM.* Page 3-9
38
Where should light fixtures be located in telecommunications spaces?
A minimum of 0.6 m (8.5 ft) AFF when possible and closely coordinating with rack, cabinet or enclosure placements TDMM.* Page 3-9
39
How should telecommunications spaces in multi-floor buildings be aligned?
Vertically aligned (stacked) TDMM.* Page 3-9
40
What is an advantage of using one or more load- bearing walls to build the telecommunications space?
Using one or more load-bearing walls reduces the possibility of relocating the space if the floor or building is expanded or altered in the future. TDMM.* Page 3-9
41
What is the purpose of locating a telecommunications space as near as possible to the center of the area to which it will provide connectivity?
It minimizes the cable lengths (between the space and the work areas). TDMM.* Page 3-9
42
What are the minimum interior dimensions of a telecommunications space if the serving area is —465 m2 (5000 ft2) or less?
-3 m (10 ft) by -2.4 m (8 ft) TDMM.* Page 3-11, Table 3.1
43
What are the minimum interior dimensions of a telecommunications space if the serving area is larger than -465 m2 (5000 ft2) and less than or equal to -743 m2 (8000 ft2) ?
-3 m (10 ft) by -2.74 m (9 ft) TDMM.* Page 3-11, Table 3.1
44
What are the minimum interior dimensions of a telecommunications space if the serving area is larger than -743 m2 (8000 ft2) and less than or equal to -929 m2 (10,000 ft2) ?
-3 m (10 ft) by -3.4 m (11 ft) TDMM.* Page 3-11, Table 3.1
45
Where are shallow rooms permitted to serve as telecommunications spaces?
In buildings that are smaller than -465 m2 (5000 ft2) TDMM.* Page 3-11, Table 3.2
46
Name 3 types of cabinets that may serve a building that is smaller than 93 m2 (1000 ft2).
1 .Wall cabinets 2.Self-contained cabinets 3.Enclosed cabinets TDMM.* Page 3-11, Table 3.2
47
If minimum size guidelines cannot be met for reasons outside the control of the ICT designer, what space guideline should be followed instead?
If minimum space guidelines cannot be met, provide -1.2 m (4 ft) depth by 1 .83 m (6 ft) width by -2.6 m (8.5 ft) height (inside dimensions) for every 240 four-pair cable terminations served. TDMM.* Page 3-11
48
How much termination space should be allocated for balanced twisted-pair cables utilizing patch panel connections?
-2580 mm2 (4 in2) for each 4-pair circuit to be patched or cross connected TDMM.* Page 3-12, Table 3.3
49
How much termination space should be allocated for optical fiber cables?
-1290 mm2 (2 in2) for each optical fiber core/strand to be patched or cross connected TDMM.* Page 3-12, Table 3.3
50
How much termination space should be allocated for coaxial cables?
-1290 mm2 (2 in2) for each coaxial cable to be patched or cross connected TDMM.* Page 3-12, Table 3.3
51
How much additional termination space may need to be allocated for the proper routing of cables, jumpers, equipment cords, and patch cords?
Up to 20 percent more space Page 3-12
52
Name 3 factors that determine how much additional termination space is needed for proper cable routing.
1 .Mounting scheme used 2. Type and layout of connecting hardware used 3.Active equipment TDMM.* Page 3-12
53
Name 3 forms of protection against contaminants in telecommunications spaces.
1 . Vapor barriers 2. Positive room pressure 3. Absolute filters TDMM.* Page 3-13
54
How much clear space should be above and below the top and bottom of the connecting hardware for cable management?
=127 mm (5 in) TDMM.* Page 3-14
55
What is the maximum length for patch cords, equipment cords, or jumpers in an HC (FD)?
-5 m (16.5 ft) TDMM.* Page 3-74
56
What is the maximum length total length for patch cords/jumpers, equipment cords connected to the HC (FD)?
-10 m (33 ft) TDMM.* Page 3-14
57
What is the maximum length for patch cords or jumpers in addition to the work area equipment cord that serves the MC (CD) or IC (BD)?
-20 m (66 ft) TDMM.* Page 3-14
58
What is the recommended height for racks, cabinets, and enclosures?
—2.1 m (7 ft) TDMM.* Page 3-14
59
How many walls in a telecommunications space should be lined with AC grade or better, void-free plywood?
At least 2 TDMM.* Page 3-16
60
How high should plywood be mounted in a telecommunications space?
-200 mm (8 in) AFF TDMM.* Page 3-76
61
What type of telecommunications space is defined as an enclosed architectural space for housing telecommunications equipment, cable terminations, and cross- connect cabling?
Telecommunications room (T R) TDMM.* Page 3-19
62
What type of telecommunications space is defined as a case or housing for telecommunications equipment, cable terminations, and cross- connect cabling?
Telecommunications enclosure TDMM.* Page 3-19
63
True or False A TR is limited to serving one tenant.
False. A TR may serve only one tenant, or it may serve multiple tenants. TDMM.* Page 3-19
64
True or False There is no maximum number of TRs or TES that may be provided in a building.
True. There is no maximum number of TRs or TES that may be provided in a building. TDMM.* Page 3-19
65
Name the 3 types of cabling facilities that may be housed in a TR.
1.HCs (FDs) 2.ICs (BDs) 3.MCs (CDs) TDMM.* Page 3-19
66
Which type of cabling facility is used to make connections to the horizontal cabling in the TR and the TE?
HC (FD) TDMM.* Page 3-19
67
True or False An EF may contain a TR.
True. An EF may contain a TR. TDMM.* Page 3-20
68
What is the minimum number of TRs for a floor that does not contain
At least one. There shall be at least one TR or ER per floor. TDMM.* Page 3-21
69
What is a shallow room?
An enclosed space for housing cable terminations, cross-connect cabling, and telecommunications equipment TDMM.* Page 3-25
70
How many dedicated, non- switched duplex receptacles should be available for equipment power in each TE?
A minimum of 1 TDMM.* Page 3-26
71
What is the minimum light requirement for a T E?
-538 lux (50 foot-candles) TDMM.* Page 3-27
72
What is the maximum area that should be served by a single TE?
-334 m2 (3600 ft2) TDMM.* Page 3-27
73
What is an equipment room?
An environmentally controlled centralized space for telecommunications equipment that usually houses an MC (CD) or an IC (BD) TDMM.* Page 3-28
74
How do ERs differ from TRs?
ERs are generally considered to serve a building, campus, tenant, or SP, whereas TRs serve a floor area of a building. TDMM.* Page 3-28
75
Name 4 reasons a building would contain multiple ERs.
To provide one or more of the following: 1 .Separate facilities for different types of equipment and services 2.Redundant facilities and disaster recovery strategies 3.A separate facility for each tenant in a multi-tenant building 4.A separate facility for each access provider (AP) and service provider (SP) TDMM.* Page 3-28
76
True or False An ER may provide any or all of the functions of a TR or an EF
True. An ER may provide any or all of the functions of a TR or an EF. TDMM.* Page 3-29
77
Name 3 components commonly found in an ER.
1 .Active equipment 2.Cross-connect facilities 3.BASs or other building system equipment TDMM.* Page 3-30
78
Name 5 types of apparatus typically housed in an ER.
1 .Power conditioning and backup systems 2.Environmental controls 3.Telecommunications equipment 4.Fire suppression or smoke/heat detection systems 5.Access control systems (ACSs) and intrusion detection systems (IDSs) TDMM.* Page 3-30
79
Name the 4 most common types of backbone cabling/media.
1 .Balanced twisted-pair 2.Multimode optical fiber 3.Singlemode optical fiber 4.Coaxial TDMM.* Page 3-37
80
Name 5 factors to consider when performing an initial assessment of an ER design.
1 .Customer requirements 2. Telecommunications pathway locations 3.Access provider (AP) and service provider (SP) requirements 4. Environment/facility conditions and resources 5.Building requirements TDMM.* Page 3-31
81
What is the most basic step in planning an ER?
Selecting a suitable location TDMM.* Page 3-32
82
Name the 2 factors that generally dictate the amount of space allocated for the ER.
1 .Size and variety of systems to be installed 2.Size of the area that the room will serve TDMM.* Page 3-32
83
True or False Layouts for cabling pathways are generally determined after the location of ERs, EFs, and TRs are established.
True. Layouts for cabling pathways are generally determined after the location of ERs, EFs, and TRs are established. TDMM.* Page 3-33
84
If a separate access provider (AP) space is required, where should it be located?
In or adjacent to the EF Note: It may require a mesh partition or locked cabinet. TDMM.* Page 3-33
85
How much space should be allocated for each access provider (AP) in an EF?
At least 1.2 m by -1.83 m (4 ft by 6 ft) TDMM.* Page 3-33
86
Name 2 benefits of locating the ER near the electrical service entrance.
1 .Aids in designing an optimal bonding and grounding (earthing) arrangement 2.Minimizes bonding and grounding (earthing) disturbances TDMM.* Page 3-35
87
Who controls the access to an ER that is shared by multiple tenants?
The building owner or agent TDMM.* Page 3-35
88
True or False Whenever practicable, the ER should be located next to the mechanical room.
False. An ER should not share space or be located adjacent to a mechanical room or any other space that is subject to any adverse environmental conditions. TDMM.* Page 3-36
89
What is the minimum amount of floor space that should be allocated for an ER?
-3 m (10 ft) by -4.9 m (16 ft) TDMM.* Page 3-37
90
What can the ICT designer use to determine the minimum size of the ER if the specific equipment that will be used is unknown?
The amount of floor space that the ER will serve TDMM.* Page 3-39
91
What industry average is used to calculate space for work areas?
-9.3 m2 (100 ft2) TDMM.* Page 3-39, step 1, NOTES
92
What is the minimum size permitted for an ER that will serve fewer than 200 work areas?
-15 m2 (1 60 ft2) TDMM.* Page 3-39
93
Name 5 factors that are used to determine the minimum working clearance around equipment in the ER.
1 . Voltage 2.Exposure of live parts 3.Equipment orientation 4.AHJ 5.Location of grounded parts TDMM.* Page 3-40
94
How much floor area is typically required for equipment cabinets in an ER?
-0.9 m2 (10 ft2) of floor area plus an additional =0.9 m2 (10 ft2) for working clearance TDMM.* Page 3-40
95
What types of cable pathways are commonly used to route bulk cables within the ER?
*Cable tray or ladder rack systems *Access floors (raised floors) TDMM.* Page 3-42
96
What is the minimum amount of access headroom that is required when a cable tray system is installed in an ER?
-203 mm (8 in) TDMM.* Page 3-42
97
What is the recommended amount of access headroom for a cable tray system the is installed in an ER?
-305 mm (12 in) TDMM.* Page 3-42
98
True or False All cable must be plenum rated when cooling or return air is provided under access flooring.
True. When cooling or return air is provided under access flooring, all cabling must be plenum rated. TDMM.* Page 3-42
99
Name 2 characteristics of strapping, hooking, and lashing that make them unsuitable (typically) for being the primary means of cable distribution within an ER.
1 .Limited bulk cable capacity 2.Inability to accommodate change TDMM.* Page 3-43
100
What types of cable pathways are commonly used to allow telecommunications cables to enter and exit the ER?
*Slots and sleeves *Conduits TDMM.* Page 3-44
101
Sleeves and slots are the most common method for routing cable through building walls and floors. Why are sleeves preferred?
Sleeves are preferred because they are easier to firestop. TDMM.* Page 3-44
102
How many sleeves should be provided to run cable
A minimum of four 103 mm (4 trade size) sleeves with at least one spare Sleeve TDMM.* Page 3-44
103
Why should sleeves and slots be specified before the building is constructed?
Because coring (cutting) holes through existing concrete: *Is expensive *Can create dust or water damage *Can compromise structural integrity TDMM.* Page 3-44
104
What is the purpose of using a bushing on the end of a conduit?
It helps to avoid damaging the cable sheath. TDMM.* Page 3-44
105
What component should be used if cable bends will be required near a conduit?
Cable sheaves TDMM.* Page 3-44
106
Name 3 reasons conduits are not recommended for use in an ER unless they are required by code.
They are generally not recommended because they: *Are expensive *Have limited bulk capacity *Accommodate change poorly TDMM.* Page 3-44
107
Why should ER cross-connects be located near the end of the backbone pathways?
Because it will minimize the need for cable routing in the ER TDMM.* Page 3-44
108
True or False The ICT designer is usually responsible for designing and installing electrical power equipment in the ER.
False. The ICT designer is usually not responsible for designing and installing electrical power equipment; however, the ICT designer shall be capable of specifying electrical power requirements for the ER. TDMM.* Page 3-45
109
Name 5 components that can be used to protect an ER from power fluctuations.
1 .Dedicated branch circuits serving individual outlets 2.Dedicated electrical power feeders 3.Power conditioning 4.Backup power 5. Effective telecommunications bonding and grounding (earthing) infrastructure TDMM.* Page 3-45
110
What does a dedicated branch circuit serve?
A single outlet utilizing a dedicated phase, neutral, and ground conductor TDMM.* Page 3-46
111
Why should an electrical power quality audit be performed before telecommunications equipment is installed?
To assess the need for additional power conditioning TDMM.* Page 3-47
112
True or False Backup power is strongly recommended for ERs.
True. Because of the mission critical nature of the ER, it is strongly recommended that backup power be provided in the event of power failure. TDMM.* Page 3-47
113
Name 3 environmental requirements for telecommunications equipment.
1 . Temperature control 2.Humidity control 3.Dust and containment control TDMM.* Page 3-48
114
Limit changes in temperature and humidity to around — percent.
Limit changes in temperature and humidity to around 1 percent. TDMM.* Page 3-49
115
Where should HVAC sensors and controls be located in an ER?
Ideally -1.52 m (5 ft) AFF TDMM.* Page 3-49
116
Name 6 alarms that should be installed (at a minimum) for the HVAC system for an ER.
1 .ac Power loss 2.High and low temperature 3.High and low humidity 4.Smoke detection 5.Compressor failures 6.Water flooding TDMM.* Page 3-49
117
What is condensate?
Moisture obtained through the air during the dehumidification process TDMM.* Page 3-49
118
How often should belts and filters be checked as part of routine maintenance for the HVAC system in an ER?
At least every 6 months TDMM.* Page 3-49
119
What should the ICT designer do to ensure that the warranties on equipment remain in force?
The ICT design should follow the manufacturer's instructions and requirements exactly to ensure that the warranties remain in force. TDMM.* Page 3-50
120
What should the ICT design do in cases where site constraints make it impossible to follow the manufacturer's instructions or requirements?
Consult the manufacturer about alternatives that will not void the warranty; then ask that the manufacturer acknowledge any acceptable alternatives in writing. TDMM.* Page 3-50
121
What should the ICT designer check after equipment installation for the ER is complete?
*Workmanship for safety, standards, and code compliance *Cleanup *Compliance with construction documents TDMM.* Page 3-51
122
What is an entrance facility (EF)?
An entrance to a building for both public and private network service media, including wireless. This includes the entrance point (EP) at the building wall or floor, the conduit or pathway, and continuing on to the entrance room or space. TDMM.* Page 3-52
123
True or False EFS must be located in a separate room from the ER.
False. An EF may be located in a separate room or within the ER. TDMM.* Page 3-52
124
Name 3 elements included in a service entrance.
1 .Path that telecommunications entrance facilities follow on private or public property 2.Single or multiple EPs to the building 3. Termination point or DP TDMM.* Page 3-52
125
Name 4 factors that influence the type and location of the entrance that will be used.
1 . Type of facility being used 2.Path the facility follows 3.Building architecture 4.Aesthetics TDMM.* Page 3-52
126
Name 4 types of media that can enter an EF.
1 .Balanced twisted-pair copper 2.Coaxial 3.Optical fiber 4. Wireless TDMM.* Page 3-53
127
Name 3 types of OSP facilities that can be used for a service entrance.
1 .Underground 2.Direct-buried 3.Aerial TDMM.* Page 3-53

MJ Class (23 decks)

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