What is the effect of turning on all available downstream carrier tones in a DMT DSL transmission systems?
A. Downstream RS error correction effectiveness is reduced.
B. The downstream line rate and throughput remains unchanged, but FEC efficiency is reduced.
C. The upstream DSL bandwidth is reduced, since less carriers become available for upstream traffic.
D. The downstream DSL bandwidth is increased.
Answer: D
During the modem boot process, how does the modem acquire the downstream channel?
A. The modem is commanded by the CMTS to set to the specific channel.
B. The modem uses the default value in the broadcom chipset.
C. The modem tuner sets a level as defined by the DOCSIS specification.
D. The modem tuner scans the downstream spectrum until digital QAM modulated signal is encountered
Answer: D
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