April 2003
Intermediate to advanced
432 pages
11h 10m
English
Content preview from End-to-End DSL Architectures
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Chapter 2
| 1: | Which of the following impairments always prevents ADSL implementation?
|
| A1: | Answer: C. Load coils were designed specifically to block frequencies above the standard voice range, 0 to 4 kHz, which includes the range of DSL traffic. AM radio interference, impedance mismatches, and bridged taps are hindrances to DSL service but do not automatically prevent ADSL service. |
| 2: | Which of the following is not one of the three primary methods of forward error correction in ADSL?
|
| A2: | Answer: B. Discrete multitone (DMT) is simply a type of modulation for DSL. Division into multiple tones does not correct any errors. Trellis Coding and Reed-Solomon ... |
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