Langley CST - 3D151 Vol 2

100 Questions | By Clientsystemskin | Last updated: Mar 21, 2022 | Total Attempts: 418

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1.

The process of condensation occurs when air particles are:
- A.
  
  Pressurized, causing them to move closer together
- B.
  
  Heated rapidly causing them to spread farther apart
- C.
  
  Heated rapidly causing them to move closer together
- D.
  
  Pressurized, causing them to be released to the atmosphere
2.

In hertz (Hz), what range of sound can the human ear detect?
- A.
  
  200 to 3,000
- B.
  
  20 to 20,000
- C.
  
  20 to 200,000
- D.
  
  Up to 2,600
3.

The loudness of a sound is closely related to what part of the sine wave?
- A.
  
  Amplitude
- B.
  
  Frequency
- C.
  
  Tone
- D.
  
  Pitch
4.

Noise may be introduced into speech signals by thermal agitation and:
- A.
  
  Power variations
- B.
  
  Amplitude variations
- C.
  
  Black body raditation
- D.
  
  Molecular breakdown
5.

In hertz (Hz), what is the actual voice frequency band?
- A.
  
  300 to 1,600
- B.
  
  300 to 2,600
- C.
  
  300 to 3,400
- D.
  
  300 to 3,800
6.

Which models of end offices in the Digital Multiplex System (DMS) family are commonly used at Air Force bases to provide base telephone services?
- A.
  
  DMS-100 and Meridian System Logic (MSL)-100
- B.
  
  DMS-100/200 and MSL-100
- C.
  
  DMS-100/200 and DMS-200
- D.
  
  DMS-200 and MSL-100
7.

Which model of Digital Multiplex System (DMS)-100 family switches is installed in compact modular cabinets?
- A.
  
  System load (SL)-1
- B.
  
  DMS-100
- C.
  
  DMS-200
- D.
  
  Meridian System Logic (MSL)-100
8.

What is the maximum number of ports that a Meridian System Logic (MSL)-100 will support?
- A.
  
  10,000
- B.
  
  30,000
- C.
  
  100,000
- D.
  
  300,000
9.

Which type link is normally used to interconnect two peripheral modules (PM) in the Digital Multiplex System (DMS)?
- A.
  
  Digital signal (DS)-1
- B.
  
  DS-30A
- C.
  
  DS-32
- D.
  
  T1A
10.

What major area is connected to the central side (C-side) of a network module (NM) in the Digital Multiplex System (DMS)?
- A.
  
  Control node (CN)
- B.
  
  Peripheral module (PM)
- C.
  
  Message controller (MC)
- D.
  
  Central control
11.

What is the mounting bracket called on which transmission or swtiching equipment is mounted in a Digital Multiplex System (DMS)?
- A.
  
  Bay
- B.
  
  Card
- C.
  
  Shelf
- D.
  
  Frame
12.

What contains bays of the same functional equipment?
- A.
  
  Bay
- B.
  
  Card
- C.
  
  Shelf
- D.
  
  Frame
13.

Which Digital Multiplex System (DMS) component uses 16-bit Motorola 68000 or 8-bit Intel microprocessors?
- A.
  
  A device controller
- B.
  
  The network message controller
- C.
  
  A peripheral module's (PM) peripheral processor (PP)
- D.
  
  The computing module's (CM) central processing unit (CPU)
14.

How many channels of data does each digital signal (DS) 30 speech link carry?
- A.
  
  30
- B.
  
  32
- C.
  
  34
- D.
  
  36
15.

Up to how many duplicated digital signals (DS)-30 links are used to connect a line group controller (LGC) to the network module (NM)?
- A.
  
  6
- B.
  
  8
- C.
  
  16
- D.
  
  24
16.

What type of digital signal (DS) links are used to connect the Digital Multiplex System (DMS)-Core and the DMS-Bus?
- A.
  
  1
- B.
  
  30
- C.
  
  30A
- D.
  
  512
17.

How many inter-message switch links (IMSL) can be configured in a SuperNode?
- A.
  
  2
- B.
  
  4
- C.
  
  8
- D.
  
  16
18.

Where are the system clocks located within the SuperNode?
- A.
  
  Network module (NM)
- B.
  
  Peripheral module (PM)
- C.
  
  Digital Multiplex System (DMS)-Bus
- D.
  
  DMS-Core
19.

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)?
- A.
  
  1
- B.
  
  3
- C.
  
  30
- D.
  
  512
20.

Where are the DMS-Core and DMS-Bus housed?
- A.
  
  Line trunk controller (LTC)
- B.
  
  Dual plane combined core (DPCC)
- C.
  
  Multipoint controller (MC)
- D.
  
  Multipoint control unit (MCU)
21.

What is the first step in the pulse code modulation (PCM) process?
- A.
  
  Discrete amplitudes are assigned to the sampling pulses
- B.
  
  A binary code number is assigned to the sample
- C.
  
  The quantizer limits the amplitude of the pulses
- D.
  
  The analog signal is band-limited
22.

In the pulse code modulation (PCM) process, changing the quantized samples into a binary word is called:
- A.
  
  Encoding
- B.
  
  Sampling
- C.
  
  Quantization
- D.
  
  Band limiting
23.

What is a method of putting many users on a single cable pair?
- A.
  
  Time code multiplexing
- B.
  
  Pulse code modulation
- C.
  
  Pulse amplitude modulation
- D.
  
  Time division multiplexing
24.

In the time division multiplexing (TDM) process, the rate of sampling must be equal to:
- A.
  
  The lowest frequency sampled multiplied by the sampling rate per cycle
- B.
  
  The highest frequency sampled multiplied by the sampling rate per cycle
- C.
  
  Twice the lowest frequency sampled multiplied by the sampling rate per cycle
- D.
  
  Twice the highest frequency sampled multiplied by the sampling rate per cycle
25.

Each 125 microsecond time period in the digital signal (DS) 30 signaling format (used within the voice network system) is called a:
- A.
  
  Span
- B.
  
  Frame
- C.
  
  Channel
- D.
  
  Snapshot