Which modulation techniques are typical of ADSL, but not SDSL, SHDSL, or IDSL?

Which DSL modulation types allows line sharing (DSL and POTS voice on the same line)?

What is not a valid service type between an 827 and a 6400?

What is true concerning fastpath versus interleaved mode in DMT DSL service?

What ADSL DMT line rate requires (occupies) the most bandwidth on a telephone line?

The major difference between DMT and CAP is:

What is true concerning interleaved versus fastpath mode in DMT DSL service?

A DSL subscriber says that his DSL modem is trained at the subscribed rates, 1024 kbps downstream and 256 kbps upstream, but he has no access to the internet. The internet service was working until today. The modem remains trained – it is not dropping train or frequently retraining. Manually retraining the modem does not correct the problem. The customer can ping from his PC to the Ethernet interface on the DSL modem, but not addresses “in the network”. Initial troubleshooting shows that the DSL modem can ping the subscriber’s PC, but no addresses in the network. What could cause this problem?

IDSL and SDSL use what line coding scheme?

A DSL subscriber reports that the CPE modem untrains and retrains several times each hour, but not at regular intervals. The subscriber has a DMT modem operating on 10 kft of #26 cable (3 km of 0.4 mm cable). The provisioned downstream rate is 2 mbps, and the provisioned upstream rate is 256 kbps. When the modem retrains, the downstream DSL may be as low as 512 kbps. Sometimes manually retraining the modem allows it to return to a 2 mbps line rate, and sometimes manually retraining the modem does not improve the DSL line rate. Which options would cause the
intermittent train/untrain symptom as described? (multiple answer)