15. Technical schedules published by DCA show circuit parameters for all
the services provided by the DCS. The most stringent circuit parameters are
required for
a. facsimile.
b. nonsecure voice.
c. automatic switching networks.
d. automatic secure voice communication.
16. Circuit parameters are important in establishing standards for circuit
quality.
Circuit parameters that are especially important to high-speed
data communication over voice circuits are
a. noise and crosstalk.
b. interference and noise.
c. amplitude-Frequency response and interference.
d. frequency response and envelope delay.
17. The need for equalization depends on the type of service and the line
facilities. Equalization is always essential for circuits in automatic
a. secure voice circuits passing over a wide-band radio set.
b. digital networks passing through a wide-band modem.
c. switching networks passing over voice facilities.
d. voice networks passing through coaxial cable.
18. Assume that a noise measuring test set has a switch position marked C-
message.
This switch arranges the circuit in the test set to give it
characteristics of a
a. 500-type subset.
b. 302-type subset.
c. bandpass input filter.
d. line terminated in a 302-type subset.
25
Previous Page
