Practice Quiz

CEDIA ESPA EST Practice Test

Category - DHTI

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Which of the following is used to transmit caller identification information?
  1. IVR
  2. FSK
  3. DSL
  4. H.323
Explanation
Answer - B - FSK is used to transmit caller identification information.

Key Takeaway: FSK is a frequency modulation method that transmits digital data using the frequency changes of a carrier wave. FSK uses one frequency that represents a binary 1 and another frequency that represents a binary zero. The telephone or caller ID box converts these to ASCII characters for display.
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