Chapter 20 Flashcards
ADO
Auxiliary Disconnect Outlet
1 . An extension of a
telecommunications circuit
demarcation point from a common
owner’s space into a tenant’s
individual space.
2. A device usually located within
the tenant or living unit used to
terminate the ADO cable or
backbone cable. (T IA)
TDMM: Page G-75
AP
Access Provider
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.
(T IA) See service provider (SP).
TDMM.* G-4
CTR
Common Telecommunications Room
The space where backbone and ADO
cables terminate.
TDMM.* Page 20-11
DD
Distribution Device
A facility used for the termination
and connection of outlet cables, DD
cords, equipment cords, and in
some cases, ADO cables.
TDMM.* 20-6
DP
Demarcation Point
The point of interface between the
access provider (AP) and the owner
of homes, MDUs, and campuses.
TDMM.* Page 20-4
Living Area
Any area in which voice/data/video
applications may be used.
TDMM.* Page 20-3, Table 20.1, Notes
MDU
Multi-DweIIing Unit
A category of dwellings with
multiple living spaces in one
structure or complex. It includes
apartments, townhouses,
condominiums, and assisted living
facilities. These facilities may be
under a single roof or consist of
multiple buildings in a
residential campus.
TDMM.* G-124
NID
Network Interface Device
The point of connection
between networks.
TDMM.* G-129
Permanent Link
The permanent part of the cabling
installed (e.g., cable up to
m [295 ft] from the DD to the
outlet and the connectors) without
patch cords installed on
each end of the cable.
TDMM.* Page 20-24
Who is responsible for
telecommunications cabling
within residential units?
End users (e.g., owners of homes, multi-
dwelling units [MDUs], and campuses)
TDMM.* Page 20-1
Name 3 factors to consider
when designing a cabling
system for a residential
project.
- Anticipated long-term services
- Maximum flexibility
- Convenience of the tenant
TDMM.* Page 20-1
What does Grade 1 residential
telecommunications
cabling provide?
A generic cabling system that meets
the minimum requirements for
telecommunications services
TDMM.* Page 20-2
What types of media are
provided in a Grade 1
residential cabling system?
- One 4-pair balanced twisted-pair
cable and associated connectors
that or exceed requirements
for category 5e - One 75-ohm Series-6 coaxial
cable and associated connectors
TDMM.* Page 20-2
What category of cable does
the TDMM recommend for
installation in a Grade 1
residential cabling system?
Category 6
TDMM.* Page 20-2
What does Grade 2
residential telecommunication
cabling provide?
A generic cabling system that
meets the requirements for
current and developing basic,
advanced, and multimedia
telecommunications services
TDMM.* Page 20-2
At a minimum, what types
of media are provided in a
Grade 2 residential
cabling system?
- Two 4-pair balanced twisted-pair
cables and associated connectors
that meet or exceed the
requirements for category 5e
cable - Two 75-ohm Series-6 coaxial
cables and associated connectors
TDMM.* Page 20-2
What category of cable does
the TDMM recommend be
installed for a Grade 2
residential cabling system?
Category 6
TDMM.* Page 20-2
What topology is used to
install residential cabling?
Star topology
TDMM.* Page 20-2
What is the maximum length
for each outlet cable?
90m (295 ft)
TDMM.* Page 20-2
How many
telecommunications outlets
should be installed in each
living area of a residential
facility?
At least one
TDMM.* Page 20-3
How can a designer reduce the
need for long equipment cords
in living areas?
Install multiple telecommunications
outlet/connectors in each living area
TDMM.* Page 20-3
Define demarcation point (DP)
as it relates to
residential cabling.
The point of interface between the
access provider (AP) and the owner
of homes, MDUs, and campuses
TDMM.* Page 20-4
Where is the DP typically
located in a
single-family residence?
On the outside of an exterior
building wall
TDMM.* Page 20-4
Name the 4 types
recommended backbone cable
for residential cabling
systems.
- 100-ohm balanced twisted-pair
- Multimode optical fiber
- Singlemode optical fiber
- Trunk, feeder, and distribution
coaxial cable
TDMM.* Page 20-5
Name 3 topologies that may
be used to deploy coaxial
backbone cable in a residential
cabling system.
- Star topology
- Bus topology
- Star and bus topology
TDMM.* Page 20-5
Name 2 topologies that
may be used to deploy optical
fiber cable in a residential
cabling system.
- Star topology
- Ring topology
TDMM: Page 20-5
Where does the
ADO cable reside?
In the distribution device (DD)
TDMM.* Page 20-5
How many 4-pair cables must
a balanced-twisted pair ADO
cable accommodate?
At least 2 per living unit
TDMM.* Page 20-5
What determines the proper
number of pairs required for
an ADO cable?
The tenant’s needs
TDMM.* Page 20-5
What type of coaxial cable
should be used for a
coaxial ADO cable?
Series-6
TDMM.* Page 20-5
How many coaxial cables
must an ADO cable
accommodate?
At least 2 per living unit
TDMM.* Page 20-5
Name 2 functions of an ADO.
- Provides a means for the tenant
to disconnect from an AP - Provides terminations for
connection to the premises
cabling
TDMM.* Page 20-6
How many balanced twisted-
pairs should be included in the
design of an ADO?
A minimum of 8
TDMM.* Page 20-6
How many coaxial cables
should be included in the
design of an ADO?
A minimum of 2
TDMM: Page 20-6
How many optical fiber
strands should be included in
the design of an ADO?
4
TDMM.* Page 20-6
Is the garage of
a single-family home a
permissible location
for the DD?
Only if the space is conditioned
(temperature and humidity
controlled) and accessible
for maintenance
TDMM.* Page 20-6
Define distribution device (DD)
as it relates to a residential
telecommunications system.
A facility that is used for the
termination and connection of outlet
cables, distribution device (DD)
cords, equipment cords and in some
cases, auxiliary disconnect outlet
(ADO) cables
TDMM.* Page 20-7
What are the distance
requirements for providing
access to the building
electrical ground?
*Within 1.52 m (5 ft) of the DD
In accordance with applicable codes
TDMM. Page 20-6
Name 2 factors used to
allocate wall space for a
distribution device in a
residential system.
- Grade of service
- Number of telecommunications
outlet/connectors to be installed
TDMM.* Page 20-7
How many cable runs should
be included in the design of a
distribution device?
20 to 50 percent more cable runs
than the original installed
number of runs
TDMM.* Page 20-7
What is the distance
requirement between the
dedicated duplex electrical
outlet and the DD?
The outlet must be installed within
1.52 m (5 ft) of the DD.
TDMM.* Page 20-8
What type of electrical outlet
must be included in the
DD to accommodate
fiber-to-the-home?
A dedicated 1 5-A, 120 Vac nominal,
nonswitchable duplex
electrical outlet
TDMM.* Page 20-8
How many outlet cable runs
extend from the DD to each
telecommunications outlet?
1 or more
TDMM: Page 20-8
What category of balanced
twisted-pair cable is
recommended for
telecommunications outlet
cable in a residential system?
Category 6A
TDMM: Page 20-8
When are weather-resistant
telecommunications outlets
required?
When they will be installed on
building exteriors
TDMM.* Page 20-9
How many
T568A connectors does a
Grade 1 telecommunications
outlet contain?
1
TDMM.* Page 20-9, Table 20.3
How many F connectors does
a Grade 1 telecommunications
outlet contain?
2
TDMM.* Page 20-9, Table 20.3
How many T568A connectors
does a Grade 2
telecommunications
outlet contain?
2
TDMM.* Page 20-9, Table 20.3
What components may be
housed in the CER when it is
colocated in the EF?
*Active equipment
Terminations for the DP, ADO
cable, and backbone cable
TDMM. Page 20-11
Where do backbone and ADO
cables terminate in a multi-
dwelling building?
In the common
telecommunications room (CTR)
TDMM.* Page 20-11
Where should the CTR
be located?
On each floor
OR
Every third floor
(thus serving the floor it is on and
the floors above and below)
TDMM.* Page 20-11
What is the minimum space
required for a Grade 2 CTR in
an MDU with up to five
tenant units?
=775 mm (30.5 in) wide x
=610 mm (24 in) high
TDMM.* Page 20-11, Table 20.4
What is the minimum space
required for a Grade 1 CTR in
an MDU with up to five units?
=368 mm (14.5 in) wide x
=610 mm (24 in) high
TDMM: Page 20-11, Table 20.4
What is the minimum
additional space per tenant
unit required in a Grade 1 CTR
in an MDU with more than
five units?
-32,258 mm2 (50 in2)
TDMM.* Page 20-11, Table 20.4
What is the minimum
additional space per tenant
unit required in a Grade 2 CTR
in an MDU with more than
five units?
64,516mm2 (100 in2)
TDMM.* Page 20-11, Table 20.4
Name 4 items that make up
rough-in cabling.
- Distribution device (DD)
- Auxiliary disconnect outlet
(ADO) cabling - Telecommunications
outlet/connector cabling - Mounting hardware
(e.g., wall boxes)
TDMM.* Page 20-20
What important step must the
cabling installer perform
before installing the
ADO cable?
Pinpoint the intended location of the
network interface.
TDMM.* Page 20-20
Who will be able to provide
information about the
intended location of the
network interface?
*Access provider (AP)
Builder in the case of subdivisions
and multi-dwelling buildings
TDMM. Page 20-20
Who should you contact if a
visual inspection reveals
improper connections in the
grounding system?
Access Provider (AP)
TDMM.* Page 20-20
How high should a TO be
mounted in a residential
telecommunications system?
At the same height as nearby
electrical outlets
TDMM.* Page 20-21
What is the installed height
requirement for a wall-
mounted telephone jack in a
residential unit?
220-1320 mm (48-52 in)
above the floor
Note: This may be adjusted
to accommodate the needs of
various tenants.
TDMM.* Page 20-21
What does acceptance testing
include for residential
cabling systems?
*Visual examination
*Verification of all cabling
*Qualification of copper cabling for
data cabling
Certification of copper and fiber
cabling for data cabling
TDMM. Page 20-24
When are the two steps of
verification testing performed?
1 .Prior to the installation of
insulation and drywall
2.During the trim-out stage of
cabling after painting
TDMM.* Page 20-24
Why is verification testing
performed?
To ensure end-to-end connectivity
TDMM.* Page 20-24
What is the purpose of
verification testing for
coaxial cable?
To ensure continuity
TDMM.* Page 20-24
What is included in testing for
twisted-pair cabling?
*Wire map
* Length
* Continuity to the remote end
* Shorts between two or more conductors
* Crossed pairs
Reversed pairs
*Split pairs
Any other miswiring
TDMM. Page 20-24
If implemented, when should
certification be performed?
During the permanent link
configuration
TDMM.* Page 20-24
How should multi-dwelling
residences be administered?
In the same manner as a
commercial building
TDMM.* Page 20-25
