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350-022 PDF DEMO:
QUESTION NO: 1
What will significantly degrade DSL performance, regardless of DSL rate or line length?
A.POTS splitters at the subscriber's end of the DSL line
B.POTS splitters at the telco C.O
C.Microfilters installed between a telephone and shared line
D.Radio-frequency filters on the telephone line
Correct:D
QUESTION NO: 2
The function of the ATU-R is:
A.To multiplex xDSL signals into the network core.
B.To provide a network connection for the end-user.
C.To split ADSL bandwidth from telephony bandwidth.
D.To switch ATM cells received from CPE.
E.To extend xDSL signals past the distance limitation.
Correct:B
QUESTION NO: 3
What best describes RADSL?
A.The DSL line trains at the highest rate possible, limited mainly by line conditions and provisioning options.
B.The DSL line rate (bandwidth) is automatically increased when data queues are filled to a predetermined threshold.
C.The DSL line rate remains constant while noise margins are automatically adjusted.
D.The DSL modems detect the presence of CAP, DMT, SDSL, or G.SHDSL modulation at the receiver input and automatically select the appropriate mode to transmit.
Correct:A
QUESTION NO: 4
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?
A.A defective DSL line card in the DSLAM
B.A defective DSL CPE modem
C.An open (cut or broken) tip or ring lead on the phone line between the customer premises and the telco
C.O
D.The DSL port in the DSLAM is in "shutdown" state
E.The DSL port in the CPE DSL modem is in "shutdown" state
F.The DSL operating mode in the DSLAM does not match the operating mode of the CPE DSL modem
G.A loose cable between the telco POTS splitter and DSLAM
H.A loose or broken connection between the DSL modem and telephone line
I.An incorrectly connected POTS splitter between the DSL modem and telephone line
J.A DSL microfilter was accidentally installed in the DSL line between the DSL modem and DSL line
Correct:C
QUESTION NO: 5
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)
A.It may not cause a problem, depending on the location and length of the half taps.
B.It can cause the DSL modems to train at lower line rates.
C.It will degrade upstream rates (lower frequencies), but will not degrade downstream rates (higher frequencies).
D.DSL modems operating at 15 kft (4.5 km) of cable may not train after the bridge-taps are installed.
E.Bridge-taps will not cause a problem for DSL service unless a telephone or modem is connected at the end of the new cable (half-tap) section, or unless the new section is shorted.
Correct:A B D
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Updated: May 27, 2022