Refer to the exhibit.
The output of the show call active voice command shows an ERL level of 25. Which statement
about the ERL is true?
A.
The ERL level is the absolute sum of OutSignalLevel and InSignalLevel, which equals 30. The
DSP has an error margin of 5 dB.
B.
ERL 25 shows how much echo cancellation has been performed by the echo canceller in the
router.
C.
The ERL value of 25 is not valid and hence should be ignored; however, the echo canceller is
being organized.
D.
The correct ERL could not be calculated by the echo canceller. The signal is being reflected
with 0 dB loss.
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