Coding and Multiplexing

Question 1

What is a CODEC?

Answer 1

A coder/decoder IC or circuitry that converts a voice signal into a predetermined digital format for encrypted transmission.

Question 2

The GSM (Global System for Mobile Communications) uses what type of CODEC for digital mobile radio system
communications?

Answer 2

Regular-Pulse Excited (RPE).

Question 3

Which of the following codes has gained the widest acceptance for exchange of data from one computer to another?

Answer 3

ASCII

Question 4

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?

Answer 4

The physical layer.

Question 5

What CODEC is used in Phase 2 P25 radios?

Answer 5

AMBE

Question 6

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.

Answer 6

Link layer.