Mailinglist Archive: opensuse (1517 mails)

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Re: [opensuse] Moving to IPv6
  • From: "Carlos E. R." <robin.listas@xxxxxxxxx>
  • Date: Tue, 14 Sep 2010 20:53:45 +0200
  • Message-id: <4C8FC4B9.4010508@xxxxxxxxx>
On 2010-09-14 15:20, Per Jessen wrote:
Ilya Chernykh wrote:

On Tuesday 14 September 2010 16:37:09 James Knott wrote:

Loading coils were used to make phone links work better over longer
cable runs, by equalizing frequency response in the voice bandwidth.
However, those coils also kill ADSL.

Yes, and also in this country most of telephone wiring historically
was made not with twisted pair but with cables with parallel
conductors (like this:
http://img137.imageshack.us/img137/6526/resizeoftrp.jpg )

Yep, that's also the case in western Europa. AFAIK, nobody uses twisted
pair for analog telephone wiring.

Yes, but when you group about 50 pairs in a single cable, pairs are twisted.
Twisted and grouped by
fours or eights with a strand of colour silk. Or similar combination. The twist
on the pairs can be
different for each pair (how many turns per meter).


ADSL over telephone line is not better in any way than other exotic
solutions on the market like ADSL over mains power outlets.

No, it's only a matter of providing the access and the bandwidth in the
most economical fashion.

Exactly. It appears that in Russia it is not economical, but in Western Europe
it is.


The old 2-wire telephone is both thinner and cheaper than Cat5.

There are two kinds: internal (to the house) pair, and external. The old
internal was a thin
parallel wire. The new internal pair is two wires twisted in a loose sleve,
similar to cat5, but
thinner. The old external pair had a third iron or steel wire for strength, it
could hang for
itself from poles. The current variant instead has a thick plastic cover. I
have seen a variant with
a copper braid, like coaxials.

--
Cheers / Saludos,

Carlos E. R.
(from 11.2 x86_64 "Emerald" GM (Elessar))

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