CDC 3D152 Ure Volume 3
Systems and procedures.
- 1.One disadvantage of microwave wavelengths is that the frequencies are susceptible to
- A.
A. line noise.
- B.
B. weather effects.
- C.
C. frequency distortion.
- D.
D. electromagnetic interference.
- 2.What is not a factor in determining the refractive index of air?
- A.
A. Atmospheric pressure.
- B.
B. Propagation medium.
- C.
C. Temperature.
- D.
D. Moisture.
- 3.The determining factor in calculating the correct size of a waveguide is
- A.
A. frequency.
- B.
B. power output.
- C.
C. bandwidth of the transmission medium.
- D.
D. distance between equipment and transmitter.
- 4.How many miles above the earth are satellites placed in orbit?
- A.
A. 2,230.
- B.
B. 2,320.
- C.
C. 22,300.
- D.
D. 23,200.
- 5.Which satellite communications system is used to transmit space operations?
- A.
A. Milstar Communication System.
- B.
B. Defense Satellite Communications System (DSCS).
- C.
C. Air Force Satellite Communications (AFSATCOM).
- D.
D. Ground Mobile Forces Satellite Communications (GMFSC).
- 6.To transmit an audio signal over radio frequency (RF), it first has to be
- A.
A. phase shifted.
- B.
B. transmitted.
- C.
C. modulated.
- D.
D. encoded.
- 7.What is one path high frequency (HF) transmissions follow from the antenna to the distant end?
- A.
A. Lightwave.
- B.
B. Microwave.
- C.
C. Soundwave.
- D.
D. Groundwave.
- 8.Which is not a disadvantage of laser light transmission?
- A.
A. No need for careful alignment of transmitter and receiver.
- B.
B. Cannot penetrate even very thin curtains or paper.
- C.
C. Sensitive to atmospheric interference.
- D.
D. Strictly line-of-sight (LOS) transmission.
- 9.Broadband refers to a technology that can transmit
- A.
A. a relatively wide range of frequencies.
- B.
B. only high frequency information.
- C.
C. a relatively wide range of amplitudes.
- D.
D. only high amplitude information.
- 10.Broadband technology uses all of these transmission mediums except?
- A.
A. Telephone lines.
- B.
B. Television cable lines.
- C.
C. Satellite systems.
- D.
D. laser light.
- 11.The Integrated Services Digital Network (ISDN) configuration normally used to connect switches together is the
- A.
A. basic rate interface (BRI).
- B.
B. primary rate interface (PRI).
- C.
C. trunk rate interface (TRI).
- D.
D. switch rate interface (SRI).
- 12.How many B and D channels does the standard configuration in North American Integrated Service Digital Network (ISDN) primary rate interface (PRI) application use?
- A.
A. 2, 1.
- B.
B. 30, 2.
- C.
C. 1, 24.
- D.
D. 23, 1.
- 13.What was the primary driving factor behind the invention of the telephone exchange system?
- A.
A. Point-to-point telephone access caused cabling issues.
- B.
B. The invention of the multi-line telephone.
- C.
C. Military communication requirements.
- D.
D. Radio communication requirements.
- 14.When a telephone network is circuit switched, each call
- A.
A. is broadcast over multiple paths between switches.
- B.
B. is packetized and transmitted in circuitous bursts.
- C.
C. has a dedicated circuit created by the switch.
- D.
D. requires a dedicated switch to make the connection.
- 15.The three cornerstones of voice network system security are availability,
- A.
A. circumvention, and confidentiality.
- B.
B. circumvention, and disclosure.
- C.
C. confidentiality, and integrity.
- D.
D. disclosure, and integrity.
- 16.What is the most serious threat to voice network system integrity?
- A.
A. Subversion.
- B.
B. Unauthorized monitoring.
- C.
C. Inexperienced switch technicians.
- D.
D. Inadequate maintenance practices.
- 17.How many serial data interface ports does the Meridian Option 11C Small System Controller have?
- A.
A. 32.
- B.
B. 12.
- C.
C. 3.
- D.
D. 1.
- 18.What role does the Private Branch Exchange (PBX) play in the telephony industry?
- A.
A. A medium scale switch that handles traffic for a small city.
- B.
B. A very small scale switch that is also known as a key system.
- C.
C. A large scale switch that handles the traffic for a metropolitan area.
- D.
D. A small scale switch that handles internal calls for an organization.
- 19.Which models of the digital multiplex system (DMS) family are commonly used at Air Force bases to provide base telephone services?
- A.
A. DMS-100 and Meridian System Logic (MSL)-100.
- B.
B. DMS-100/200 and MSL-100.
- C.
C. DMS-100/200 and DMS-200.
- D.
D. DMS-200 and MSL-100.
- 20.What is the maximum number of ports that a digital multiplex system-100 (DMS-100) supports?
- A.
A. 10,000.
- B.
B. 30,000.
- C.
C. 100,000.
- D.
D. 300,000.
- 21.Which elements make up the control component of the SuperNode central control?
- A.
A. Computing mode (CM) and message switches (MS).
- B.
B. CM and system load module (SLM).
- C.
C. Central processing unit (CPU) and control monitor unit (CMU).
- D.
D. CPU, digital signal (DS), and peripheral module (PM).
- 22.What link is used to connect the digital mulitplex system (DMS)-cor to the DMS-bus?
- A.
A. DS-1.
- B.
B. DS-30.
- C.
C. DS-30A.
- D.
D. DS-512.
- 23.Which major component of the NorTel digital switching system (DSS) interfaces line and trunk subscribers?
- A.
A. Central control.
- B.
B. input/output (I/O).
- C.
C. peripheral module (PM).
- D.
D. peripheral subsystem (PS).
- 24.What components are directly connected to the input/output controller (IOC)?
- A.
A. Printer, visual display unit (VDU), and tape drives.
- B.
B. A pair of SuperNode message controllers and the device controllers.
- C.
C. A maintenance and administration position (MAP).
- D.
D. The central processing unit (CPU) and keyboard.
- 25.Base cables normally enter the central office (CO) facility through a
- A.
A. cable manhole.
- B.
B. telecommunications cable closet.
- C.
C. building cable raceway.
- D.
D. cable vault.
Questions: 124 | Attempts: 1910 | Last updated: Jun 8, 2016
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Sample Question(201) At what Open System Interconnection (OSI) layer are virtual circuits established, maintained and terminated?
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Sample Question(001) Which 3D career field deploys, sustains, troubleshoots, and repairs wireless, line-of-sight, beyond line-of-sight, wideband and ground-based satellite and encryption transmission devices?
Questions: 69 | Attempts: 427 | Last updated: Mar 28, 2018
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Sample QuestionWhat is an example of analog-to-digital and digital-to-analog techniques?
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