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DSL "modem"

Posted on 1998-11-16
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Last Modified: 2013-12-27
Has anybody used a DSL modem? If so how well does it work?
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Question by:GLangan
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by:Otta
ID: 1145511
My friend uses an ADSL modem, and gets 1Mbit to 2Mbit per second,
which is *VERY* fast.
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by:GLangan
ID: 1145512
Otta
Does it interfere with reg phone line or reg phone line  interfere ADSL modem?
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by:ozo
ID: 1145513
Not if a POTS splitter is installed, as is typical.
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Expert Comment

by:Otta
ID: 1145514
> Does it interfere with reg phone line or reg phone line interfere ADSL modem?

Yes, it does interfere -- your "voice" traffic is carried
over the ADSL line, interspersed with the "data" traffic.
However, there is so much "band-width" available
that there is no degradation, so there are no "harmful" effects
from the interference.
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by:GLangan
ID: 1145515
Otta
Submit answer for points
Thank You
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by:ozo
ID: 1145516
"interspersed" seems to suggest that the voice and data signals are Time Division Multiplexed
Actually, it's Frequency Division Multiplexed, with voice below 4KHz, and data above 4KHz

(btw, depending on how far you are from the central office, you may not get 1.5Mbps, but if you can get it at all, you should have at least 384Kbps downstream
Upstream speed can be less since you're talkng about Asymmetric DSL)
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Otta earned 10 total points
ID: 1145517
> Submit answer for points.

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