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WorksheetsCDCs Vol 2 Set 2
Total questions: 101
Worksheet time: 51mins
The process of condensation occurs when air particles are
pressurized causing them to move closer together.
heated rapidly causing them to spread farther apart.
heated rapidly causing them to move closer together.
pressurized causing them to be released to the atmosphere
In hertz (Hz), what range of sound can the human ear detect?
200 to 3,000
20-20,000
20-200,000
up to 2,600
The loudness of a sound is closely related to what part of the sine wave?
amplitude
frequency
tone
pitch
Noise may be introduced into speech signals by thermal agitation and
power variations
amplitude variations
black body radiation
molecular breakdown
In hertz (Hz), what is the actual voice frequency band?
300 to 1,600
300 to 2,600
300 to 3,400.
300 to 3,800
Which models of end offices in the Digital Multiplex System (DMS) family are commonly
used at Air Force bases to provide base telephone services?
DMS–100 and Meridian System Logic (MSL)–100.
DMS–100/200 and MSL–100.
DMS–100/200 and DMS–200
DMS–200 and MSL–100
Which model of Digital Multiplex System (DMS)–100 family switches is installed in
compact modular cabinets?
System load (SL)–1.
DMS–100
DMS–200
Meridian System Logic (MSL)–100
What is the maximum number of ports that a Meridian System Logic (MSL)–100 will
support?
10,000
30,000
100,000
300,000
Which type link is normally used to interconnect two peripheral modules (PM) in the Digital
Multiplex System (DMS)?
Digital signal (DS)–1.
DS–30A.
DS–32.
T1A.
What major area is connected to the central side (C-side) of a network module (NM) in the
Digital Multiplex System (DMS)?
Control node (CN).
Peripheral module (PM).
Message controller (MC).
Central control
What is the mounting bracket called on which transmission or switching equipment is
mounted in a Digital Multiplex System (DMS)?
bay
card
shelf
frame
What contains bays of the same functional equipment?
bay
card
shelf
frame
Which Digital Multiplex System (DMS) component uses 16–bit Motorola 68000 or 8bit
Intel microprocessors?
A device controller
The network message controller
A peripheral module’s (PM) peripheral processor (PP).
The computing module’s (CM) central processing unit (CPU).
How many channels of data does each digital signal (DS) 30 speech link carry?
30
32
34
36
Up to how many duplicated digital signals (DS)–30 links are used to connect a line group
controller (LGC) to the network module (NM)?
6
8
16
24
What type of digital signal (DS) links are used to connect the Digital Multiplex System
(DMS)-Core and the DMS-Bus?
1
30
30A
512
How many inter message switch links (IMSL) can be configured in a SuperNode?
2
4
8
16
Where are the system clocks located within the SuperNode?
Network module (NM).
Peripheral module (PM).
Digital Multiplex System (DMS)-Bus
DMS-Core
What type of digital signal (DS) protocol is used as a message carrier between the Digital
Multiplex System (DMS)-Bus and the network modules (NM) and input/output controller (IOC)?
1
3
30
512
Where are the DMS-Core and DMS-Bus housed?
Line trunk controller (LTC).
Dual plane combined core (DPCC).
Multipoint controller (MC).
Multipoint control unit (MCU).
What is the first step in the pulse code modulation (PCM) process?
Discrete amplitudes are assigned to the sampling pulses
A binary code number is assigned to the sample.
The quantizer limits the amplitude of the pulses
The analog signal is band-limited
In the pulse code modulation (PCM) process, changing the quantized samples into a binary
word is called
encoding
sampling
quantization
band limiting
What is a method of putting many users on a single cable pair?
Time code multiplexing.
Pulse code modulation.
Pulse amplitude modulation.
Time division multiplexing
In the time division multiplexing (TDM) process, the rate of sampling must be equal to
the lowest frequency sampled multiplied by the sampling rate per cycle
the highest frequency sampled multiplied by the sampling rate per cycle
twice the lowest frequency sampled multiplied by the sampling rate per cycle
twice the highest frequency sampled multiplied by the sampling rate per cycle.
Each 125μs time period in the digital signal (DS) 30 signaling format (used within the voice
network system) is called a
span
frame
channel
snapshot
Integrated Services Digital Network (ISDN) can combine voice and data services over the
same wires because it uses
Internet data lines
digital subscriber lines
direct connection lines
standard telephone lines
What type of information is transmitted on a Integrated Services Digital Network (ISDN) B
channel?
Call control
supervisory
signaling
user
What are the two major established Integrated Services Digital Network (ISDN)
transmission rates?
Bearer rate interface and data rate interface
Basic rate interface and primary rate interface
Basic rate interface and secondary rate interface
Primary rate interface and secondary rate interface
What is the Integrated Services Digital Network (ISDN) R interface?
Connection point between a non-ISDN compatible device and a terminal adapter (TA).
Connection point between a network termination 1 device and the ISDN.
Incoming connection point of a network termination 2 device.
Outgoing connection point of a network termination 2 device
The Network Layer of the Open Systems Interconnection (OSI) model provides the
physical characteristics between the Integrated Services Digital Network (ISDN) interface and
the network.
physical characteristics between the Integrated Services Digital Network (ISDN) interface and
the network.
logical links between customer equipment and the circuit switch.
final preparation of the signal before it is routed.
actual routing of the signal.
What circuit board in the REDCOM switch provides two signaling channels and is only
necessary when interfacing with an Integrated Services Digital Network (ISDN)-capable switch?
T1 legacy to Internet
Message transceiver interface
T1 direct digital interface
Basic rate U
One of the main purposes of the Integrated Services Digital Network (ISDN) handset
telephone test set is to
detect noise
insert tones
verify a dial tone
insert delay signal
What is the frame rate in feet per second (FPS) for transmitting video teleconferencing data
on the Integrated Services Digital Network (ISDN)?
24
30
32
64
What component in the video teleconferencing (VTC) system converts analog signals to
digital signals?
camera
CODEC
network termination 1
CPU
How many channels are used when a voice over Internet Protocol (VoIP) session is
established between a private branch exchange (PBX) and another IP host?
One, they share the same channel.
Two, one for each direction
Three, two to transmit/receive and one to signal
Four, two to transmit and two to receive
(210) What component of voice over Internet Protocol (VoIP) is an endpoint on the network that
provides real time, bi-dir ctional communications between H.323 terminals and other switch
circuit networks (SCN)?
gateway
gatekeeper
terminal adapter
MCU
What component of voice over Internet Protocol (VoIP) provides call management
functions in a defined local area called a zone?
gateway
gatekeeper
terminal adapter
MCU
How many milliseconds should the one-way delay be from endpoint to endpoint in order to
implement voice over Internet Protocol (VoIP)?
less than 50
less than 150
greater than 50
greater than 150
What is the control system that generates a signal with a fixed relation to the phase of a
reference signal and responds to both the frequency and the phase of the input signals?
QoS
RCP
FEC
PLL
What are frequencies from 30 to 300 megahertz (MHz) internationally designated as?
High
Medium
Very High
Ultra High
The ultra high frequency designation applies to frequencies from
3 to 30 megahertz (MHz).
300 to 3,000 MHz.
3 to 30 gigahertz (GHz).
30 to 300 GHz.
Which of the following frequencies has the shortest wavelength?
14 kilohertz (kHz).
1.4 megahertz (MHz).
14 MHz
140 MHz
A mode of operation in which communication is possible between two or more stations, in both
directions, using the same frequency, is called
simplex
duplex
hybrid
half-duplex
What communication mode(s) of operation allows two or more stations to send intelligence in
both directions but not simultaneously?
duplex only
half duplex only
duplex and half duplex
simplex and half duplex
Producing radio frequency (RF) energy and radiating useful signals into space is the purpose of
the
receiver
transmitter
antenna coupler
transmission lines
What type modulation produces a constant amplitude transmission?
frequency
amplitude
phased
pulse
The ability to maintain a constant output carrier frequency refers to a transmitter’s frequency
accuracy
distortion
sensitivity
signal-to-noise ratio
The process of mixing or combining two frequencies in a nonlinear device in an amplitude
modulated (AM) receiver is called
limiting
amplifying
heterodyning
discriminating
What component of a frequency modulated (FM) receiver removes the original signal from the
sidebands and recreates the audio intelligence?
limiter
detector
amplifier
discriminator
What characteristic enables a receiver to reproduce a desired signal from several closely spaced
stations or from interfering frequencies?
sensitivity
selectivity
fade margin
thermal noise
The total resistive properties of a circuit when resistance, capacitive reactance, and inductive
reactance are formulated together is called
attenuation
impedance
resistance
distortion
What transmission line is very common in both fixed and tactical application?
Waveguide.
Twisted pair.
Shielded pair
Flexible coax
What field provides the basis of radio frequency (RF) communications by detaching from the
conductor and traveling through space?
electric
magnetic
induction
radiation
For best communications, the transmitting antenna
should be circular and the receiving antenna horizontal
should be vertical and receiving antenna horizontal
should be horizontal and receiving antenna vertical
and receiving antenna should have the same polarization
What standard antenna is used for antenna gain comparison?
whip
dipole
isotropic
parabolic
When the gain of an anisotropic radiator is compared to the isotropic radiator, the stronger
signal of the directional antenna is expressed as
dB gain
dB plus
over volatge
over watts
What is the shortest wavelength an antenna can be made resonant?
quarter
half
one
two
Where are the system clocks located within the SuperNode?
Network module (NM).
Peripheral module (PM).
Digital Multiplex System (DMS)-Bus.
DMS-Core.
What tuning devices are adjusted when tuning the resonant transmission line-resonant antenna
connection?
Capacitor and resistors
Inductors and resistors
Inductors and capacitors
Inductors, capacitors, and resistors
What limits a direct wave to normally less than 20 miles?
Curvature of the earth
Buildings in the area
Topographic features
Physical limitation of the frequency in use
Which type of precipitation attenuates radio frequency (RF) energy just like rain?
Ice
Fog
Hail
snow
What ratio is used to measure the desired signal strength relative to the background noise?
Percentage of modulation
Signal-to-noise
Selectivity
Distortion.
What combination of Air Force instructions (AFI) do you use for guidance when determining a
technical solution for personal wireless communications systems (PWCS)?
AFI 33–106 and AFI 33–118.
AFI 33–118 and AFI 33–219
AFI 33–201V1 and AFI 33–219.
AFI 33–106 and AFI 33–201V1
Which personal wireless communications system (PWCS) device can be used for command and
control?
Pager.
Land mobile radio (LMR).
Family radio service (FRS).
Intelligence, surveillance, and reconnaissance (ISR).
Which personal wireless communications system (PWCS) device’s original intent was for use
by family, friends, and associates to communicate among themselves within a small area?
LMR
Pager
FRS
PDA
What channel access method assigns each call a certain portion of time on a designated
frequency?
TDMA
PCS
FDMA
GSM
Who is usually responsible for their air time charges and must budget accordingly?
Unit
ISM
CSO
PWCS manager
Cell sites are generally thought of as being a
square
octagon
hexagon
pentagon
Which conventional land mobile radio (LMR) device has a transmitting power of 5 or 6 watts?
portable
mobile
repeater
base station
What conventional land mobile radio (LMR) device serves as the hub of a net?
portable
mobile
repeater
base station
In trunked land mobile radio (LMR) systems, different user groups are known as
talkgroups
channels
packets
nets
Which trunking user equipment has the capability to monitor more than one talkgroup at a time?
mobiles
portables
control stations
dispatch consoles
What enhanced features of the trunking land mobile radio (LMR) allows the system manager to
completely disable radios in the field from the system terminal?
scan function
squelch circuit
selective radio inhibit
talkgroup selector switch
In response to disaster relief operations, the Department of Defense (DOD) Policy on
Procurement of Mobile Satellite Services (MSS) was amended in 2006 to allow the DOD to use
additional MSS providers for
unclassified purposes outside the continental United States (CONUS).
unclassified purposes within the CONUS
classified purposes outside the CONUS
classified purposes within the CONUS
What type areas is International Mobile Satellite Organization (Inmarsat) coverage separated
into?
geographical
continental
egional
ocean
Which International Mobile Satellite Organization (Inmarsat) system has a land mobile
terminal, typically has a one meter flat array antenna, and weights 30 to 40 pounds?
B
M
Aero I
Mini-M
What are the two basic groups of channel banks?
Multiplexers and channel units
Multiplexers and demultiplexers
Channel and common equipment units
Common equipment units and demultiplexers
What is the transmission rate, in megabits per second (Mbps), of Mode 3 in channel bank
operations?
1.544
2.176
3.153
6.312
What function does the line driver unit (LDU) perform for a channel bank unit?
multiplexing
clock generation
digital/analog conversion
transmit/receive signaling
What type of shelf contains the DC552A channel service unit (CSU)?
modem
interface
data store
processor
What is another name for a stuffing or S-bit in relationship to a channel service unit (CSU)?
parity
timing
framing
sequence
What component is installed to provide a dataset protection against accidental shorts to –52
volts direct current (VDC) analog lines?
Digital service unit (DSU).
Channel service unit (CSU).
Line T–1 interface (LTI).
Load line interface (LLI).
What Meridian application provides local area network (LAN) connectivity so you can
share equipment, data files, and application software utilizing a modem?
CompuCALL
E-mail service
Visual Screen List Editing
Simplified message desk interface
Where is the optional supervisory lamp panel for the 291 Conference/Alerting System
usually installed?
Job control
The base operator.
The master station.
Central security control
Which type of equipment modules within the 291 Conference/Alerting System provide the
necessary amplification, ringing, timing, tone supply, and fusing needed for system operation?
Central office
Internal control.
External control.
Station interface.
The power plant ground supply will not provide
personnel and equipment protection.
system operation return paths
audio and radio frequency noise sinks
digital signal grounds
Fuse block number 62F14 in a given power distribution center (PDC) identifies the
15th fuse on the panel in mounting position 62.
14th fuse on the panel in mounting position 62
62nd fuse on the panel in mounting position 15
62nd fuse on the panel in mounting position 14
Alarm and control inputs detected by the alarm system hardware are interfaced with the
alarm system software through
the meridian trunk module
the office alarm unit
scan points
signal points
What hardware entity contains the alarm system backup circuits which generate an alarm if
the office alarm unit fails?
The master control.
The central processing unit
A meridian trunk module
Meridian trunk module number 8.
The primary reason you measure the voltage across terminal or distribution frame protectors
before removing and replacing them is to
make sure dangerous voltages are not present on the line
prevent interruptions to critical circuits
avoid activating alarm circuits
verify the circuit is not in use.
In addition to fiber-optic and copper cables, what do we use to interconnect integrated
communications access package access nodes on a deployed base within the same theater area?
Microwave and laser
Microwave only
Satellite and laser
Satellite only
What is the design architecture of theater deployable communications (TDC) metropolitan
area network (MAN)?
Point-point
Hub-spoke
Point-hub.
Spoke-point
What type of connectivity does a voice backbone in the theater deployable communications
(TDC) architecture provide?
64 kilobits per second (Kbps) Integrated Services Digital Network (ISDN) basic rate interface
(BRI).
64 Kbps ISDN primary rate interface (PRI).
1.544 megabits per second (Mbps) ISDN BRI.
1.544 Mbps ISDN PRI.
What equipment is included in a customer access node (CAN) to provide the inter-site
connectivity?
Troposcatter-Satellite Support Radio.
Voice switch and Promina multiplexer
Lightweight Multiband Satellite Terminal (LMST).
Secure telephone unit and AN/FCC–100 multiplexer
What major equipment in a theater deployable communications (TDC) package provides
mobile units with flexible, lightweight, secure, modular, and integrated deployable
communications?
Troposcatter-Satellite Support Radio (TSSR) and Integrated Communications Access Package
(ICAP).
Lightweight Multiband Satellite Terminal (LMST) and ICAP.
TSSR only.
LMST only.
What is the long-haul transmission component of Theater Deployable Communications
(TDC)?
Ground mobile forces (GMF) terminal.
Lightweight Multiband Satellite Terminal (LMST).
AN/TRC–170, Digital Troposcatter Radio Terminal Set.
AN/TSQ–111, Communications Nodal Control Element.
What’s the difference between the basic access module (BAM) and the configurable access
module (CAM)?
CAM provides a secure data network to local subscribers.
BAM provides a secure data network to local subscribers.
CAM has a fixed capability
BAM has a fixed capability
What Integrated Communications Access Package (ICAP) node module provides the radio
frequency (RF) line-of-sight (LOS) link function for internodal connectivity?
Microwave
Multiplexer
Crypto
Laser
Upon arrival in a theater, what frequency band does the Lightweight Multiband Satellite
Terminal (LMST) use for initial communications connectivity to the Defense Satellite
Communications System (DSCS)?
C only
X only
C and Ku
X and Ku
What theater deployable communications (TDC) system provides message handling
services?
Unit Level Message Switch.
Automatic Message Switching Set.
AN/TGC–27 Deployable Message Center
Stand-Alone Message Processing System
What must customers do to connect telephones and computer workstations to the theater
deployable communications (TDC) backbone network?
Adhere to various open system standards and interfaces such as Ethernet.
Adhere to military encryption standards on all connections
Provide an Integrated Digital Network Exchange (IDNX)/Promina multiplexer.
Provide fiber optic cables and connectors
