3-M-083: Coding and Multiplexing
3-83M1:
What is a CODEC?
A coder/decoder IC or circuitry that converts a voice signal into a predetermined digital format for encrypted transmission.
A device to read Morse code.
A computer operated digital encoding compandor.
A voice amplitude compression chip.
3-83M2:
The GSM (Global System for Mobile Communications) uses what type of CODEC for digital mobile radio system communications?
Regular-Pulse Excited (RPE).
Code-Excited Linear Predictive (CLEP).
Multi-Pulse Excited (MPE).
Linear Excited Code (LEC).
3-83M3:
Which of the following codes has gained the widest acceptance for exchange of data from one computer to another?
ASCII.
Gray.
Baudot.
Morse.
3-83M4:
The International Organization for Standardization has developed a seven-level reference model for a packet-radio communications structure. What level is responsible for the actual transmission of data and handshaking signals?
The physical layer.
The transport layer.
The communications layer.
The synchronization layer.
3-83M5:
What CODEC is used in Phase 2 P25 radios?
AMBE
IWCE
IMBC
IMMM
3-83M6:
The International Organization for Standardization has developed a seven-level reference model for a packet-radio communications structure. The _______ level arranges the bits into frames and controls data flow.
Link layer.
Transport layer.
Communications layer.
Synchronization layer.
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Color key:
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● = Unseen
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● = Weak
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● = Review
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● = Learned
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● = Incorrect answer
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