Chapter 5 Flashcards
1
Q
Access Point (AP)
A
1 . The point of entry into a
secure area.
2.A stand-alone hardware device
or a computer wireless adapter
with software that acts as a
wireless communication hub
for users of wireless devices to
connect with each other and to
bridge those devices to the
cabled portion of the network.
TDMM.* Page G-4
2
Q
ADA
A
Americans with Disabilities Act
A U.S. federal law enacted in 1990
that guarantees equal civil rights
for people with disabilities,
ensuring that individuals with
disabilities have access to or may
use public entities and government
buildings. These laws affect
telecommunications cabling,
infrastructure, design, and
installation (e.g., public telephone
height, visual and audible
signaling).
TDMM.* Page G-8
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-74
4
Q
Alternating Current
(ac)
A
A current flow that alternates
periodically (usually sinusoidal)
in magnitude and direction.
TDMM.* Page G-7
5
Q
CP
A
Consolidation Point
An interconnection point within
the horizontal cabling system.
TDMM.* Page 5-29
6
Q
EF
A
Entrance Facility
An entrance to a building for
both public and private network
service cables, including
wireless, mechanical and
electrical services, and the
entrance point at the building
wall, and continuing to the
entrance room or space. Also
called a service entrance.
TDMM.* Page G-71
7
Q
EMI
A
Electromagnetic Interference
Radiated or conducted
electromagnetic energy that has
an undesirable effect on
electronic equipment or signal
transmissions.
TDMM.* Page G-67
8
Q
ER
A
Equipment Room
1 . An environmentally controlled
centralized space for
telecommunications equipment
that usually houses a main or
intermediate cross-connect. (T IA)
2. An environmentally controlled
space for communications and
data processing equipment
supporting communications
connectivity infrastructure.
TDMM.* Page G-71
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
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
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
12
Q
MUTOA
A
Multiuser Telecommunications
Assembly
A grouping in one location of
several telecommunications
outlets/telecommunications
connectors.
TDMM.* Page G-126
13
Q
PON
A
Passive Optical Network
A point-to-multipoint network
architecture in which unpowered
optical splitters are used to enable
a single optical fiber strand to
serve multiple end-points.
TDMM.* Page 5-56
14
Q
TE
A
Telecommunications Enclosure
A box or cabinet used to house
telecommunications equipment.
Enclosures are often wall-
mounted but are sometimes
large enough to be
floor-mounted.
TDMM.* Page G-192
15
Q
Telecommunications
Outlet Box
A
A housing used to hold
telecommunications
outlets/connectors.
TDMM.* Page 5-20
16
Q
Telecommunications
Outlet/Connector
A
A connecting device (e.g.,
balanced twisted-pair outlet,
optical fiber connector/adapter)
in the work area on which
horizontal cabling terminates.
TDMM.* Page 5-20
17
Q
TP
A
Transition Point
A location in the horizontal
cabling where flat undercarpet
cable connects to round cable.
TDMM.* Page G-797
18
Q
TR
A
Telecommunications Room
A telecommunications space that
differs from equipment rooms
(ERs) and entrance facilities (EFs)
in that this space is generally
considered a floor-serving or
tenant-serving (as opposed to
building- or campus-serving) space
that provides a connection point
between backbone and
horizontal cabling.
TDMM.* Page G-193
19
Q
UTC
A
Undercarpet Telecommunications
Cable
Flat, low-profile cabling designed to
be installed directly on the surface
of a floor and covered with
carpet or tiles.
TDMM.* Page 5-76
20
Q
VoIP
A
Voice over Internet Protocol
A system in which voice signals
are converted to packets and
transmitted over a network
using transmission control
protocol/ internet protocol
(TCP/lp).
TDMM.* Page G-207
21
Q
WLAN
A
Wireless Local Area Network
A LAN that functions wirelessly
between the client and a
wireless access point (WAP).
Most modern WLANs are based
on IEEE 802.11 standards,
marketed under the Wi-Fi name.
TDMM.* Page G-209
22
Q
Name 3 components of a horizontal distribution system.
A
1 .HorizontaI cabling
2.HorizontaI pathways supporting the horizontal cabling
3. Telecommunications spaces that support the horizontal pathways
TDMM.* Page 5-1
23
Q
True or False
The use of the term
horizontal in the name of
an element requires the
element to be placed or
installed parallel to the
ground floor.
A
False. The use of the term
horizontal in the name of an
element does not require the
element to be placed or installed
parallel to the ground floor.
TDMM.* Page 5-1
24
Q
How are horizontal
pathways used?
A
To distribute, support, and provide
access to horizontal cabling and its
associated connecting hardware
between the telecommunications
outlets/connectors and the
HC (FD), typically located in
the ER, TR, or TE
TDMM.* Page 5-3
25
What is horizontal cabling?
The media contained within
horizontal pathways
TDMM.* Page 5-3
26
What is the purpose of a
continuous horizontal
pathway?
To provide uninterrupted
support and management of
telecommunications cabling
TDMM.* Page 5-3
27
What is a non-continuous
horizontal pathway?
The space between cable
supports through which cables
are placed between physical
supports or containment
components
TDMM.* Page 5-3
28
Name 4 applications that
can be supported by
horizontal cabling systems.
1 .Voice services
2.Data services
3.Audio and video services
4.Building signaling systems
TDMM.* Page 5-5
29
True or False
Horizontal cabling is often
less accessible than
backbone cabling.
True. Horizontal cabling is often
less accessible than backbone
cabling. As a result, making
changes can become time
intensive and expensive.
TDMM: Page 5-5
30
What is the required topology
for horizontal cabling?
Physical star topology
TDMM.* Page 5-6
31
Name 3 exceptions to the
requirement to use a
physical star topology for
horizontal cabling.
1 .A CP or MUTOA is used to
connect to open office cabling.
2.A TP is required to connect to
undercarpet cabling.
3.CentraIized optical fiber
cabling is implemented from
the MC (CD) to the work
area(s).
TDMM: Page 5-6
32
What is the minimum
configuration for a
horizontal cabling system?
Two telecommunications
outlets/connectors in the work
area, one for telephony and the
other for data
TDMM.* Page 5-6
33
What is the transmission
channel within a horizontal
cabling system?
The end-to-end transmission
path between two points at
which application-specific
equipment is connected
TDMM.* Page 5--7
34
Name the 3 elements of the
transmission channel.
1 . The permanent link cabling
2.Required patch, equipment,
and interconnection cords
3. The connection points
TDMM.* Page 5-7
35
What is the maximum
number of connection
points that are allowed in
the channel model?
A maximum of
4 connection points
TDMM.* Page 5-8
36
Name the 4 types of
connection points are allowed
in the channel model.
1 . Telecommunications outlet/connectors or MUTOAs
2.Connector of the first unit of connecting hardware at the HC (FD)
3.CP connector (optional)
4.Connector of the second unit of connecting hardware at the HC (FD)
TDMM: Page 5-8
37
What is the permanent link?
The cabling that extends from
the HC (FD) to the
telecommunications
outlet/connector
TDMM.* Page 5-9
38
What is the maximum
number of connection
points permitted in a
permanent link?
No more than
3 connection points
TDMM.* Page 5-9
39
What is the maximum
number of consolidation
points (CPs) permitted
within a permanent link?
No more than 1 CP
TDMM.* Page 5-9
40
How does the cross-connection
method connect active
equipment to the horizontal
cabling system?
Cross-connection is a method
where two connecting hardware
units are linked by patch cords
or cross-connect jumpers and
used to connect active
equipment to the horizontal
cabling system.
TDMM.* Page 5-10
41
What term is used to
describe the passive
connection of cabling
segments of the horizontal
and backbone systems?
Cross-connections
TDMM.* Page 5-70
42
How does an interconnection
connect horizontal cabling to
active equipment?
The horizontal cable is
terminated on the connecting
hardware (e.g. patch panel) and
an equipment cord is used to
interconnect the connecting
hardware to the active
equipment.
TDMM.* Page 5-11
43
Name 2 benefits of using
an interconnection vs. a
cross-connection.
1 .No need to use the second
unit of connecting hardware
and additional patch cord
assembly in the horizontal
cabling system
2. The saving of valuable wall or
rack/cabinet mounting space
TDMM.* Page 5-11
44
When are interconnections
allowed in the HC (FD)?
Only when the centralized
optical fiber topology is used
TDMM.* Page 5-12
45
Why are application-
specific devices required to
be kept external to the
horizontal cabling system?
Keeping application-specific
devices external to the horizontal
cabling system facilitates the use
of cabling for generic network
and service requirements.
TDMM.* Page 5-15
46
why is UTC not
recommended for use in
telecommunications
systems?
Because of a number of
negative aspects related
to performance
TDMM.* Page 5-16
47
What are the 2 components
of a UTC system?
1 .UTC cabling
2. TP where the UTC cabling
connects (transitions) to the
horizontal cabling
TDMM.* Page 5-76
48
What is a bridged tap?
A method that was widely used in
the past to divide one physical
communications line into several
cabling paths to support multiple
analog subscriber devices
TDMM.* Page 5-16
49
Why are bridged taps not
allowed in any balanced
twisted-pair system?
Because of the significant risk of
decreased performance
TDMM.* Page 5-76
50
If a bridged tap is required
to support an analog signal
in a specific work area, how
should it be installed?
By use of an adapter placed
external to the permanent link
work area connector (outlet)
TDMM.* Page 5-76
51
True or False
Splicing is not generally
permitted within the
horizontal cabling system.
True. Splicing is not generally
permitted within the horizontal
cabling system.
TDMM.* Page 5-16
52
When is splicing permitted
within a horizontal cabling
system?
When joining the optical fiber
cabling to single-ended cords to
accomplish connection to
connecting hardware in the
HC (FD) and telecommunications
outlet/connector
TDMM.* Page 5-76
53
What categories of
balanced twisted-pair and
four-pair cabling and
corresponding connecting
hardware are allowed in
horizontal cabling systems?
*Category 5e
*Category 6
*Category 6A
*Category 7
*Category 7 A
*Category 8
TDMM.* Page 5-17
54
What types of multimode
optical fiber cable and
connectors are allowed in
horizontal cabling systems?
*OM3
*OM4
*OM5
TDMM.* Page 5-17
55
What types of singlemode
optical fiber cable and
connectors are allowed in
horizontal cabling systems?
*OS1a, minimum 2 strand
*OS2
TDMM.* Page 5-17
56
What is the maximum
permitted cable length
within a permanent link?
-90 m (295 ft)
TDMM.* Page 5-17
57
What is the maximum
permitted length for a
24 AWG balanced twisted-
pair cord that is used within
a channel but not within the
permanent link?
-5 m (16.5 ft)
TDMM.* Page 5-77
58
What is the maximum permitted length for a 26 AWG balanced twisted-pair cord that is used within a channel but not within the
permanent link?
-3.96 m (13 ft)
TDMM.* Page 5-17
59
What is the purpose of
providing cable slack in a
horizontal cabling system?
To enable the possibility of
future changes in the horizontal
cabling system configuration
TDMM.* Page 5-19
60
How much cable slack is
recommended for balanced-
twisted pair cabling that is
terminated in the TR?
Sufficient to reach the farthest
corner of the TR via the pathways
plus the distance from floor to
ceiling without exceeding the
100m (295 ft) limitation
TDMM.* Page 5-19
61
How much cable slack is
recommended for optical
fiber cabling that is
terminated in the TR?
Sufficient to reach the farthest
corner of the TR via the pathways
plus the distance from floor to
ceiling and an additional
m (10 ft) of slack for storage
inside hardware without exceeding
the m (295 ft) limitation
TDMM.* Page 5-19
62
How much cable slack is
recommended for balanced
twisted-pair cabling that is
terminated in a work area?
-0.3 m (1 ft)
TDMM.* Page 5-19
63
How much cable slack is
recommended for optical
fiber cabling that is
terminated in a work area?
1 m (3.3 ft)
TDMM.* Page 5-19
64
Work Area
Spaces in a building where
occupants normally work and
interact with their
telecommunications equipment
TDMM.* Page 5-20
65
Name 4 components that
are typically used to
accommodate the
equipment in a work area.
1 . Telecommunications
outlet/connector
2.Work area equipment cords
3.MUTOAs and CPs
WAP s
TDMM.* Page 5-20
66
Name the 2 key elements
of open office cabling.
1 .MUTOA
2.CP
TDMM.* Page 5-20
67
What term describes a
connecting device in the
work area on which
horizontal cabling
terminates?
Telecommunications
outlet/connector
TDMM.* Page 5-20
68
In most cases, what type of
connector is required for
terminating 4-pair balanced
twisted-pair cabling?
8P8C-type modular connector
TDMM.* Page 5-21
69
Identify the pair/pin
assignment shown here.
White Green
Green
White Orange
Blue
White Blue
Orange
White Brown
Brown
T568A
TDMM: Page 5-21, Figure 5.11
70
Identify the pair/pin
assignment shown here.
White Orange
Orange
White Green
Blue
White Blue
Green
White Brown
Brown
T568B
TDMM.* Page 5-21, Figure 5.11
71
Name the 3 most common
multimode and singlemode
optical fiber connectors.
1.SC
2.ST
3.LC
TDMM.* Page 5-22
72
What is the minimum number
of telecommunications outlets
required for each work area?
1 outlet with a minimum of
2 recognized connectors per outlet
TDMM.* Page 5-22
73
What size telecommunications
outlet box is required to
accommodate one or two
27 mm (1 trade size) conduits?
A minimum of
=100 mm (4 in) x
=100 mm (4 in) x
-57 mm (2.25 in)
TDMM.* Page 5-22
74
The work area
telecommunications outlet
shall be located within ____
of an electrical outlet.
The work area
telecommunications outlet
shall be located within
1 m (3.3 ft) of an electrical outlet.
TDMM.* Page 5-23
75
What is the purpose
of a MUTOA?
To connect more than one user
(work area) to the horizontal
cabling system
TDMM.* Page 5-25
76
What is the maximum
number of work areas that
can be served by one
MUTOA?
12
TDMM.* Page 5-27
77
The use of a MUTOA cabling
design option allows work
area equipment cords to
extend beyond ____
The use of a MUTOA cabling
design option allows work area
equipment cords to extend beyond
-5 m (16.5 ft).
TDMM.* Page 5-27
78
Do not use 24 AWG work
area equipment cords with
lengths that exceed
Do not use 24 AWG work area equipment cords with lengths that exceed -22 m (72 ft).
TDMM.* Page 5-27
79
What is the maximum
allowable length of
balanced twisted-pair
cabling when using a
MUTOA?
90m (295 ft)
TDMM.* Page 5-28
80
What is the maximum
allowable length of
balanced twisted-pair
cabling when using a
MUTOA?
100m (328 ft)
TDMM.* Page 5-28
81
Why should MUTOAs be
installed 15 m (49 ft) from
the HC (FD) when balanced
twisted-pair cabling is
used?
To minimize the effects of
multiple connections in close
proximity on near-end crosstalk
loss and return loss
TDMM.* Page 5-29
82
What is the functional
difference between a CP
and a MUTOA in the open
office environment?
The CP introduces an additional
connection for each horizontal
cabling run.
TDMM.* Page 5-29
83
Name 4 spaces where CPs
can be located if permitted
by codes, standards, and
regulations.
1 .Suspended ceilings
2.Access floors
3.ModuIar office furniture
4.Work area
TDMM.* Page 5-30
84
How many CPs are
permitted in the same
horizontal cable run?
No more than 1
TDMM.* Page 5-31
85
Which CP layout offers
the highest degree
of flexibility?
CPs located on all columns
TDMM.* Page 5-32, Table 5.2
86
Which CP layout offers
the lowest degree
of flexibility?
CPs located on columns
close to the building core
TDMM.* Page 5-32, Table 5.2
87
How easily do CPs located
in a checkerboard order
accommodate change?
Yes. Changes are easily
accommodated when CPs are
located in a checkerboard order.
TDMM.* Page 5-32, Table 5.2
88
Which type of CP layout
does not accommodate
changes easily?
CPs located close to the building
core do not accommodate
changes easily.
TDMM: Page 5-32, Table 5.2
89
What type of CP layout
tends to use the shortest
work area equipment
cords?
CPs located on all columns tend
to have the shortest work area
equipment cords.
TDMM.* Page 5-32, Table 5.2
90
Which CP layout tends to
have the lowest
deployment costs?
CPs located close to the building
core tend to have the lowest
deployment costs relative to
other configurations.
TDMM.* Page 5-32, Table 5.2
91
What is a WLAN AP?
Network device located in areas
of a building or campus and
placed in relatively close
proximity to where users interact
with their wireless enabled
network devices
TDMM.* Page 5-36
92
The HDBaseT Alliance
created a Power over
HDBaseT (POH) standard
that delivers a maximum of
_ W over four pairs.
The HDBaseT Alliance
created a Power over
HDBaseT (POH) standard
that delivers a maximum of
95W over four pairs.
TDMM.* Page 5-37
93
What are the levels of
specifications for HDBaseT?
HDBaseT 1.0 and HDBaseT 2.0,
which have the same power
specifications
TDMM.* Page 5-37
94
What is the maximum
power at the source for
PoE Type 1?
15.40 w
TDMM.* Page 5-37, Table 5.3
95
What is the maximum
current per conductor for
PoE Type 2?
300 mA
TDMM.* Page 5-37, Table 5.3
96
What is the maximum
current per pair for
PoE Type 3?
600 mA
TDMM.* Page 5-37, Table 5.3
97
What is the maximum
power at the source for
POE Type 4?
100 w
TDMM.* Page 5-37, Table 5.3
98
What is the maximum
current per pair for POH?
1000 mA
TDMM.* Page 5-37, Table 5.3
99
What is the maximum
operating temperature
for cabling?
60 ºC (140 ºF)
TDMM.* Page 5-37
100
What cable jacket
temperature rating is
recommended for cabling
that will be used in
BAS/BMS?
75 ºC (167 ºF)
TDMM.* Page 5-40
101
What is the minimum
recommended category of
balanced twisted-pair
cabling for AV systems?
Shielded category 6A/class EA
TDMM.* Page 5-40
102
What size conductors
are recommended for
lighting systems?
23 AWG min/22 AWG
TDMM.* Page 5-40
103
What is the minimum
recommended category of
balanced twisted-pair
cabling for WLAN systems?
Category 6A/class EA
TDMM.* Page 5-40
104
Patch cords smaller in
diameter than — AWG shall
not be used to support the
delivery of power.
Patch cords smaller in diameter
than 28 AWG shall not be used
to support the delivery of power.
TDMM.* Page 5-40
105
How does temperature
rise affect the electrical
performance of a cable?
Temperature rise causes
electrical performance of the
cable to slightly degrade.
TDMM.* Page 5-41
106
What is the recommended
maximum number of
cables in a cable bundle?
24 cables
TDMM.* Page 5-41
107
Name 3 factors used to
determine NEC ampacity
ratings for balanced
twisted-pair cabling.
1 .Bundle size
2.Conductor diameter (AWG)
3.Cable temperature ratings
TDMM.* Page 5-41
108
What is the most common
cable temperature rating?
60 ºC (140 ºF)
TDMM.* Page 5-41
109
How is POE transmitted?
Using common-mode voltage
on the cable pairs
TDMM.* Page 5-42
110
Why are metal-body 8P8C
connectors recommended
for POE applications
instead of plastic ones?
Metal in the connector body
instead of plastic creates an
improvement in heat dissipation.
TDMM.* Page 5-42
111
Why should 50-micron
gold-plated tines should be
specified for PD modular
connectors and
patch cords?
Connectors and patch cords that
do not have gold plating will fail
earlier when used in POE
applications.
TDMM.* Page 5-42
112
What drawback is associated
with deploying large numbers
of POE switches?
Significant amounts of
wasted power
TDMM.* Page 5-43
113
What is an advantage of
specifying the use of
midspan devices?
They offer power to POE devices
using legacy switches.
TDMM.* Page 5-43
114
Why should power injectors
be located as close as
possible to the receiving
equipment or device?
To minimize power loss and
heating of the cabling
TDMM.* Page 5-43
115
Name 3 methods for
connecting work areas to a
centralized cross-connect.
1 .Pull-through cables from the centralized cross-connect
2. Interconnection cabling in a floor-serving telecommunications
space
3. Spliced cabling in a floor-serving telecommunications space
TDMM.* Page 5-44
116
Where is the pull-through
method typically used?
In small, one- or two-story
buildings with a limited
number of users
TDMM.* Page 5-46
117
Where is the backbone cabling
method typically used?
In larger buildings where
permanently routed backbone
cables would minimize disruption
to firestop assemblies when
adding new users to the system
TDMM.* Page 5-46
118
True or False
A centralized optical fiber
cabling installation can be
deployed between buildings
or across a campus.
False. The centralized optical
fiber cabling installation is
limited to optical fiber cabling
within a building and may not be
deployed between buildings or
across a campus.
TDMM.* Page 5-46
119
What is the recommended
length limit for the pull-
through method?
The maximum length limit
for the application or
=305 m (1000 ft), or whichever
is smaller
TDMM.* Page 5-46
120
Name the 3 primary
components of an
FTTO system.
1 .Passive cabling
2.Containment system
3.Active network equipment
TDMM.* Page 5-50
121
Describe the construction
of a pre-terminated
assembly.
A 2-strand fiber cable that has
been terminated with LC
connectors on one side
TDMM.* Page 5-51
122
How many work areas are
served by a micro-switch?
1 to 2
TDMM.* Page 5-53
123
What topology serves as the
basis of an FTTO system?
Centralized cabling topology
TDMM.* Page 5-54
124
True or False
The FTTO design does not
use any active equipment
in the floor TR or TE.
True. The FTTO design does not
use any active equipment in the
floor TR or TE.
TDMM.* Page 5-54
125
Name 4 variants of
redundancy possible in the
FTTO design.
1 .Variant 1: Classical FTTO with
cascading via balanced twisted-
pair cabling
2.Variant 2: Classical FTTO with
cascading via optical fiber cable
3.Variant 3: Dual homing—Double
optical fiber connections
4.Variant 4: Dual homing—Single
optical fiber connection
TDMM.* Page 5-55
126
What is a PON?
A point-to-multipoint network
architecture in which unpowered
optical splitters are used to enable
a single optical fiber strand to
serve multiple end-points
TDMM.* Page 5-56
127
Name 3 advantages
of a PON.
1 .Reduces physical cabling
infrastructure
2.Minimizes the
telecommunications space
requirements through the use
of passive optical splitters
3.Reduces electrical power and
HVAC requirements in the floor
serving TR
TDMM.* Page 5-56
128
Name the 5 primary
PON variations.
1. BPON (legacy technology)
2. GPON
3. EPON
4. 10GPON
5. 10G-EPON
TDMM.* Page 5-57
129
What is the primary
standard for GPON?
ITU G.984
TDMM.* Page 5-57, Table 5.4
130
What is the primary
standard for EPON?
IEEE 802.3ah
TDMM.* Page 5-57, Table 5.4
131
What is the primary
standard for 10GPON?
ITU G.987
TDMM.* Page 5-57, Table 5.4
132
What is the primary
standard for 1 OG-EPON?
IEEE 802.3av
TDMM.* Page 5-57, Table 5.4
133
What enables bidirectional
communications over one
strand of optical fiber as
well as multiplication of
capacity in PON systems?
WDM technology
TDMM.* Page 5-58
134
What is commonly referred
to as the aggregation point
for PON architecture?
Optical line terminal (OLT)
TDMM.* Page 5-58
135
Which component acts as
the interface for the
PON system?
Optical network terminal (ONT)
TDMM.* Page 5-59
136
Name the 2 commonly
deployed enterprise
PON ONTs.
1.4-port desktop ONTs
2.Faceplate-style ONTs
TDMM.* Page 5-59
137
What is the maximum
channel attenuation for
IEEE 802.3 EPON?
20 dB
TDMM.* Page 5-60, Table 5.5
138
What is the maximum
supported distance for
IEEE 802.3 EPON?
10 km (6.2 mi)
TDMM: Page 5-60, Table 5.5
139
What is the maximum
channel attenuation for
IITU G.987 IOGPON?
31 dB
TDMM: Page 5-60, Table 5.5
140
What is the maximum
supported distance for
ITU G.987 10 GPON?
40km (25 mi)
TDMM.* Page 5-60, Table 5.5
141
What is the purpose of the
passive optical splitter?
To split the single fiber output
from each PON link exiting the
OLT to a variety of splitter ratio
outputs, each terminating
at the ONT
TDMM.* Page 5-60
142
What split ratio is typically
used for enterprise PON
deployments?
1:32
TDMM.* Page 5-60
143
What serves as the
permanent link of a PON?
A simplex singlemode optical
fiber cabling connection
TDMM.* Page 5-61
144
What is usable floor space?
The building area used by
occupants for their normal daily
work functions, including
hallways, but not other common
areas of the building (e.g.,
restrooms, utility closets)
TDMM.* Page 5-66
145
How much space is
commonly allocated for an
individual workspace in a
commercial office
environment?
-9.3 m2 (100 ft2)
of usable floor space
TDMM.* Page 5-66
146
How much total floor space
should be allocated for
every BAS outlet or device?
-23.2 m2 (250 ft2)
TDMM.* Page 5-66
147
How many cables should
be provided for each
system or coverage
area in a BAS?
1 cable
TDMM.* Page 5-66
148
Telecommunications
outlet/connector boxes
should not be placed back
to back to serve adjacent
rooms. Why not?
Because it can compromise the
effectiveness of the wall as a
sound barrier and as a firestop
TDMM.* Page 5-67
149
Why are telecommunications
boxes mounted at the same
height as electrical outlet
boxes?
To provide uniform appearance
and accessibility in the work area
TDMM.* Page 5-67
150
A conduit run should have
no single bend greater than
_ degrees.
A conduit run should have
no single bend greater than
degrees.
90
TDMM.* Page 5-71
151
A conduit run should not
contain an aggregate of
bends in excess of
degrees between pull
points or pull boxes.
A conduit run should not contain
an aggregate of bends in excess
of 180
degrees between pull
points or pull boxes.
TDMM.* Page 5-71
152
What is the length
limitation for continuous
sections in a conduit run?
-30.5 m (100 ft)
TDMM.* Page 5-71
153
What is a conduit body?
A conduit coupling that has a
removable cover to allow access
to the cable for placing purposes
TDMM.* Page 5-72
154
What is the primary
purpose of a conduit body?
To give access to or to change
the direction of the
conduit system
TDMM.* Page 5-72
155
Name the 3 most common
styles of conduit body.
1.90-degree bend left, right, or
back
2. T configuration
3.C or straight inline fitting
TDMM: Page 5-72
156
What formula is used to calculate the cross-sectional area of a cable or conduit?
Cross-sectional area = 0.785 x d2
TDMM.* Page 5-73
157
How should the pathway
design be adapted if the
conduit run requires more
than two 90-degree bends?
A pull point or pull box should be
provided between sections with
two bends or fewer.
TDMM.* Page 5-81, Table 5.71
158
How should the pathway
design be adapted if the
conduit run requires a
reverse bend?
A pull point or pull box should be
inserted at each bend having an
angle from 100 degrees
to 180 degrees.
TDMM.* Page 5-81, Table 5.11
159
Name 3 instances where a
third bend may be permitted
in a conduit run.
1 . The total run is not longer than
10m (33 ft).
2. The conduit size is increased.
3.One of the bends is located
within =300 mm (12 in) of the
cable feed end.
TDMM.* Page 5-81
160
Name 2 requirements for
placing a pull box in a
ceiling space.
1 . The pull box must be listed for
that purpose.
2. The pull box must be placed
above a suitably marked,
removable ceiling panel.
TDMM.* Page 5-83
161
What is the minimum
length for a pull box?
16 times the diameter of the
largest conduit entering
the pull box
TDMM.* Page 5-83
162
What are the depth and
width requirements for
the pull box?
The depth and width must be
adequate for fishing, pulling,
and looping.
TDMM.* Page 5-83
163
True or False
A slip sleeve should be
used as a splice location.
False. A slip sleeve should not
be used as a splice location.
TDMM.* Page 5-84
164
What term refers to a sheet
metal housing that is
placed over an opening in a
conduit run?
Gutter
TDMM.* Page 5-84, Table 5.13
165
What is the advantage of
underfloor conduit
systems?
Their low initial installation cost
for areas that have only a few
telecommunications
outlets/connectors
TDMM.* Page 5-85
166
Name the 2 general types
of access floors.
1 .Standard-height floors
2.Low-profile floors
TDMM.* Page 5-85
167
What is the most common
type of access floor?
Standard-height floors
TDMM.* Page 5-85
168
How are low-profile
floors defined?
As floors that are less than
150 mm (6 in) high
TDMM.* Page 5-85
169
What are the 4 typical
components of an
access floor?
1 .Steel footings
2.PedestaIs
3.Floors with or without stringers
4.Modular floor panels
TDMM.* Page 5-86
170
What are the 3 major
purposes of stringered
systems?
1 . To brace the pedestals for
improved lateral stability
2. To provide additional support
for the panels
3. To facilitate frequent removal
and replacement of floor
panels
TDMM.* Page 5-86
171
What is the sole support for
panels in freestanding and
cornerlock access floors?
Pedestals
TDMM.* Page 5-87
172
What is the finished height
restriction for freestanding
systems?
-305 mm (12 in) or less
TDMM.* Page 5-87
173
What is the recommended
clearance for cable or cable
pathways in low-profile floors?
19mm (0.75 in)
TDMM.* Page 5-87
174
What is the minimum
clearance for standard-
height floors in a general
office area?
At least —152 mm (6 in) above
the structural floor
TDMM.* Page 5-87
175
What is the recommended
clearance for standard-
height floors in a general
office area?
At least =203 mm (8 in)
above the structural floor
TDMM.* Page 5-87
176
What is the recommended
minimum clearance for
standard-height floors in a
general office area when
multiple systems will be
installed?
At least -305 mm (12 in)
above the structural floor
TDMM.* Page 5-87
177
What is the required
finished floor height where
the plenum will be used
for HVAC?
-305 mm (12 in) or greater
TDMM.* Page 5-87
178
How much free space is
required between the top of
the cable tray side rails and
the underside of the
stringers?
A minimum of 51mm (2 in)
TDMM.* Page 5-88
179
What 2 common types of
building structures should
be considered when
planning access flooring
for new and existing
buildings?
1 .Depressed slab
2.Normal slab
TDMM.* Page 5-88
180
What materials should be
used to cover floor panels
in a computer room?
High-pressure laminate, vinyl, or
other durable tile
TDMM.* Page 5-90, Table 5.14
181
What materials should be
used to cover floor panels
in an office?
Factory-laminated carpet
or no material
TDMM.* Page 5-90, Table 5.74
182
What is the uniform load
capacity for a medium-duty ER?
-4.8 kPa (100 lbf/ft2)
TDMM.* Page 5-90, Table 5.75
183
What is the concentrated load
capacity for a medium-duty ER?
-8.8 kN (2000 lbf)
TDMM: Page 5-90, Table 5.15
184
What is the uniform load
capacity for a medium-duty
general office?
=2.4 kPa (50 lbf/ft2)
TDMM.* Page 5-90, Table 5.75
185
Name 2 causes
of dynamic load.
1 .Accidental impacts
2.Rolling objects
TDMM.* Page 5-90
186
Name 4 methods of
containment used for
main runs.
1 .Dedicated routes
2.Enclosed raceway distribution
3.Cable trays
4.Cable matting
TDMM.* Page 5-91
187
True or False
Many ICT distribution designers
consider the access floor
system the best distribution
system available.
True. Many ICT distribution
designers consider the access
floor system the best
distribution system available.
TDMM.* Page 5-92
188
How much clear vertical
space is needed above
conduits in a ceiling space?
A minimum of -77 mm (3 in)
TDMM.* Page 5-94
189
How much clear vertical space is needed above raceways in a ceiling space?
A minimum of -305 mm (12 in)
TDMM.* Page 5-94
190
What size zones are the
usable floor areas divided
into with the ceiling zones
method?
Into -23.2 m2 (250 ft2) to
92.9 m2 (1000 ft2) zones
TDMM.* Page 5-95
191
How much space should be
provided between a
suspended ceiling and
cabling pathways?
Up to -152 mm (6 in)
TDMM.* Page 5-98
192
What is the maximum
interval spacing that can be
used between non-
continuous cable supports
(J-hooks)?
-1.52 m (5 ft)
TDMM.* Page 5-99
193
What is a utility column?
A post used by a ceiling
distribution system
TDMM.* Page 5-701
194
Name 2 requirements for
concealing cables behind walls.
1 .An unimpeded vertical path
2.A pull cord
TDMM.* Page 5-102
195
How are cable tray systems
commonly used?
As distribution systems for
cabling within a building
TDMM.* Page 5-105
196
What type of cable tray
consists of two side rails
connected by individual
transverse rungs or
stringers?
Ladder
TDMM.* Page 5-105, Table 5.17
197
What type of cable tray has
a ventilated bottom with
side rails?
Ventilated trough
TDMM.* Page 5-105, Table 5.77
198
How wide is a ventilated
channel cable tray?
No more than 152.4 mm (6 in)
TDMM: Page 5-105, Table 5.77
199
What type of cable tray is an
open tray having a central
rigid spine with cable support
ribs along the length at
90-degree angles?
Spine
TDMM.* Page 5-105, Table 5.17
200
What is a basket tray?
A cable tray made of a
welded steel wire mesh
TDMM.* Page 5-105, Table 5.77
201
Name 4 types of
cable tray fittings.
1 .Elbows
2.Reducers
3.Crossovers
4.Tees
TDMM.* Page 5-706
202
Name 5 types of accessories
used with cable trays.
1 .Covers
2.HoId-down devices
3.Dropouts
4.Conduit adapters
5.Dividers
TDMM.* Page 5-706
203
What determines a cable tray
system's load capacity?
*Static load capacity of the tray
*Length of the support spans
TDMM.* Page 5-108
204
Name 3 items that are
installed to support
cable trays.
1 .Cantilever brackets
2. Trapeze supports
3.Individual rod suspension
brackets
TDMM.* Page 5-708
205
Trays and wireways are usually supported on ____ centers unless they are designed for greater spans.
Trays and wireways are usually supported on 1.52 m (5 ft) centers unless they are designed for greater spans.
TDMM.* Page 5-108
206
A support shall also be placed
on each side of
within
any connection to a fitting
in cable tray.
A support shall also be placed
within =0.6 m (2 ft) on each side
of any connection to a fitting
in cable tray.
TDMM.* Page 5-708
207
True or False
Cable trays may be used
as walkways, ladders, or
support for personnel.
False. Cable trays should never
be used as walkways, ladders, or
support for personnel. Cable
trays shall only be used as
mechanical support for cables.
TDMM.* Page 5-108
208
Where are messenger or support strands used?
In ceiling voids, crawl spaces, tunnels, and areas with unfinished, exposed, or structural ceilings
TDMM.* Page 5-110
209
How are perimeter
pathways often used?
TO serve work areas where
telecommunications devices
can be reached from walls or
partitions
TDMM.* Page 5-110
210
What is the practical capacity
for telecommunications
cabling in perimeter
raceways?
Between 20 percent and 40
percent fill, depending on the
cable bending radius
TDMM.* Page 5-111
211
Where should perimeter
raceways be used?
Small floor areas where the
majority of telecommunications
service will be along the walls
TDMM.* Page 5-111
212
Name 3 types of
molding raceways.
1 .Picture molding for use in
rooms
2.Wood or eaves trough metal
moldings for use in hallways
3.Baseboard and crown molding
TDMM.* Page 5-112
213
What is the recommended
separation between
telecommunications
pathways and electrical
pathways are running
parallel?
A minimum of 51mm (2 in)
TDMM.* Page 5-115
214
Name 2 purposes of a
poke-through device.
1 .Maintain the fire rating of the
penetrated floor
2.Provide power and
telecommunications cabling to
open space environments
TDMM.* Page 5-116
215
Why is Title Ill of the ADA
of primary concern to
design consultants in the
United States?
Because it defines public
accommodations and
commercial facilities
TDMM.* Page 5-117
216
When is a facility
considered a place of
public accommodation?
It is considered a public
accommodation if it:
*Is operated by a private entity
*Conducts operations that affect
commerce
*Meets the auidelines listed in
Title Ill of the ADA
TDMM.* Page 5-117
217
What is a
commercial facility?
A facility whose operation
affects commerce even though
that is not its main function
TDMM.* Page 5-117
218
What does "readily
achievable removal of
barriers" mean?
Readily achievable removal of
barriers means removal of
architectural and communications
barriers to the disabled that can be
accomplished easily and carried
out without much difficulty
or expense.
TDMM.* Page 5-118
219
When are added
accessibility costs
considered
disproportionate?
When they exceed more than
20 percent of the original
alteration
TDMM.* Page 5-118
220
How many interior TTYs
must be provided in a
covered shopping mall?
1 interior TTY regardless of the
number of public telephones
at the location
TDMM.* Page 5-119
221
What locations in a hospital
are required to provide
TTYs on the public phones?
*Emergency rooms
*Waiting rooms
*Recovery rooms
TDMM.* Page 5-119
222
Where are TTYs required in
bus and rail facilities?
At the entrance to the facility
TDMM.* Page 5-119
223
Where are TTYs required
in an airport?
*Concourse within the security
area
*Baggage claim area
TDMM.* Page 5-719
224
What percentage of the
first 100 rooms in a hotel
must be equipped
with TTYs?
4 percent
TDMM.* Page 5-119
225
Under the ADA, what is
maximum high side reach
for unobstructed side-reach
telephones?
-1220 mm (48 in)
TDMM: Page 5-120, Table 5.79
226
Under the ADA, what is
maximum high forward
reach for unobstructed
forward-reach telephones?
-1220 mm (48 in)
TDMM.* Page 5-120, Table 5.79
227
What is the universal
installation height for
telephones?
-1220 mm (48 in) or less
TDMM.* Page 5-723
228
Under the ADA, how many
public telephones in a
newly constructed facility
must be equipped with
volume control?
25 percent
TDMM.* Page 5-123
229
True or False
Unless a state law or local
building code adopts the ADA
requirements or unless the
given code is certified by the
U.S. Department of Justice,
state and local building
inspectors will not enforce
the law.
True. The ADA is a civil rights law.
This means that unless a state law
or local building code adopts the
ADA requirements or unless the
given code is certified by the U.S.
Department of Justice, state and
local building inspectors will not
enforce the law.
TDMM.* Page 5-125
230
How is the ADA enforced?
By action of an aggrieved party
(i.e., by filing a lawsuit)
TDMM.* Page 5-125
