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QUIZ
Mark the box next to the letter with the correct answer. Answers on next page.
1) The ringer in the traditional rotary dial telephone utilizes . . .
A. a speaker and microphone.
B. a permanent magnet and armature.
C. a liquid crystal display.
D. a piezoelectric buzzer.
2) The ringer circuits are connected . . .
A. directly to the dialer IC.
B. between the tip and ring outputs.
C. to the speaker input.
D. between the microphone and ground.
3) When the ringer switch is off, . . .
A. the 20Hz ringing signal is converted to DC.
B. the 20Hz ringing signal is converted to 3kHz.
C. the buzzer is disabled.
D. none of the above.
4) In the traditional rotary dial telephone, the transmitter consists of . . .
A. a speaker similar to those found in your radio and TV.
B. a piezoelectric buzzer.
C. a case filled with carbon granules.
D. an electret microphone.
5) In the traditional rotary dial telephone, the receiver consists of . . .
A. a speaker similar to those found in your radio and TV.
B. an integrated circuit.
C. an FET amplifier.
D. an electret microphone.
6) Sidetone is . . .
A. the frequency band on either side of the voice signal.
B. the tone a caller hears when the number called does not exist.
C. the tone a caller hears when the number called is ringing.
D. the tone a speaker hears from the receiver when he speaks into the transmitter.
7) The bridge rectifier D1 through D4 . . .
A. rectifies the 3kHz buzzer signal.
B. reverses the polarity of the 48VDC input.
C. insures that a positive voltage is fed to the telephone circuit regardless of the input polarity.
D. none of the above.
8) In a tone dialer . . .
A. the number of tones sent correspond to the digit being dialed.
B. each digit corresponds to a different frequency tone.
C. the amplitude of the tone corresponds to the digit being dialed.
D. none of the above.
9) Pressing the " * " button . . .
A. executes pause (pulse mode).
B. redials the last number dialed.
C. resets the dialer IC.
D. disables the ringer.
10) Pressing the "#" button . . .
A. disables the microphone.
B. redials the last number dialed (pulse mode).
C. resets the dialer IC.
D. disables the ringer.
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