1.
The following are wire sizes used in telephone company cables. Which will allow the greatest "reach" (distance) in DSL service?
2.
A DSL line status report shows a high number of corrected and uncorrected errors. The line is configured at 4 milliseconds interleave delay and 4 FEC check-bytes. To reduce the number of uncorrected errors without a
detailed analysis of whether the errors are continuous or "bursty", which of the following should provide improved error correction?
3.
A subscriber's DSL service was not working correctly. The subscriber discovered that a DSL microfilter was accidentally installed between the DSL modem and telephone line instead of between the telephone and
telephone line. What was the symptom observed by the subscriber?
4.
Which three are major inhibitors of ADSL line quality? (multiple answer)
5.
The function of the ATU-R is:
6.
What command shows the number and type of cards in the 6160 DSLAM?
7.
A subscriber complains that his DSL rates are slower than the service he ordered. The customer ordered ADSL at 1 mpbs downstream and 256 kbps upstream, but the maximum bitrate
observed during file downloads is 100 kbps downstream. Of the following four choices, which is clearly the most appropriate information needed to begin troubleshooting the problem?
8.
The telephone company has placed a bridge-tap (half-tap) on all the pairs in a cable in preparation to reroute the cable. DSL customers are served by this cable. Three of the following five statements are correct. Which three of the following statements describes the possible effect of placing bride-taps on a DSL line? (multiple answer)
9.
What is the effect of changing DMT interleaved delay from 16 milliseconds to 2 milliseconds?
10.
A DSL modem will not train up. It is on a "shared line" (DSL and POTS), and the telephone on the shared line is working normally. Nine of the ten conditions are possible causes of the symptom, and one is not. What is NOT a possible cause of the problem?