A local Internet Service Provider (ISP)installed a new DSL service and DSL
modem for high-speed Internet access. The Internet connection is up and working.
However there us a low humming noise on the phones, and voice calls are degraded.
Which of the following is the probable cause for this voice degradation?
A.
The ATU-C is misconfigured.
B.
The ATU-R is not installed properly.
C.
There is EMI on the plain old telephone system (POTS) line.
D.
There are no low-pass filters installed on the plain old telephone system (POTS) line.