After a while I figured out that you are in Germany...
in order to find that out I googled to "DSL-6000" and afterwards I also 
saw that you share your firstname with Udo Juergens  :-)

Just to say that "DSL-6000" is a brandname that people from other 
countries maybe dont immediately understand.

Now, for a technical explanation of what has happened , I can say the 
following..

The things we call DSL today, came out of 2 technologies that had other 
names in the past.
- Technology to combine data and voice on a single link
- Technology to send data without expensive modems, so called "base band 
modems"

What probably happened, at the risk of making a blooper 'cause I did not 
visit and crawl around the rooms of your house....

If I understand you well, you have the 12-wire cables in a star going 
from 1 point to every room, but it is of critical importance to know if 
at the central point the 1st and 2nd and 3rd ..n'th 12-wire cable are 
attached/connected to eachother.

Because IF they are attached to eachother, then you DSL router is 
attached to 1 arm of the star, and the other wires are connected but are 
unused.  (even if other wires are used for a phone.. or ISDN)

These unused wires cause incredible so called "standing wave" 
reflections, making it harder for the modem to talk to its counterpart in 
the Telekom exchange where a so-called DSLAN is installed.   We humans, 
can compare this like singing an opera inside an empty septi-tank, with 
the sound reflecting from all 360 degree metal sides.  It makes you nuts.

Now, it is very well possible that a DSL-2000 uses a lower speed on the 
trunk line that comes in from the Telekom; but the DSL-6000 uses a higher 
speed.  (The website says DSL-6000 doubles the bandwith which an 
expensive word for "capacity", like the number of lanes on a motorway.)
With that higher speed, the misery of reflections becomes MUCH worse. 
(exponentially)

So, you may leave things as they are, because it works.
Or, you may detach the unused 12 wire cables, and use central RJ45 
connectors with a patch panel to select which (room-)line needs to be 
activated on DSL or ISDN.
<http://de.wikipedia.org/wiki/Rangierfeld>  for an impression of a 
patchpanel with German local-talk tourist information.  You may want a 
small version of this.

The doubling of the trunk speed, and the presence of side-lines on your 
internal cabling is most likely the cause of your problems.  There should 
not be too many T-intersections in your cables.
With phones that tends to work, but with DSL you may not exaggerate with 
these.

Marc

Udo Huth wrote on 08-01-2007 16:20 * * * Start of original message text * 
* *

>> In emailer-Digest V2006 #145, the person identified as Bea Hopkinson
>> <[EMAIL PROTECTED]> thoughtfully said:
>> 
>>> Some months ago I decided to get high speed internet from Earthlink.
>>> We went through two modems and 3 routers before we discovered
>>> that our house did not receive the signal well in the office and didn't
>
>Speaking of cables... I have a 12-wire telephone cable running from a
>central point to every room in the house. On the cable to the "main computer
>room" (or office) I have used two wires for the "old" analog phone signal,
>four wires for the ISDN signal, and two wires for the DSL signal . This used
>to work like a charm with DSL-2000. After upgrading to DSL-6000 I could not
>get the DSL router to work in the office.
>
>After some experiments I found that the wires formerly used for ISDN would
>transmit the DSL signal properly to the office again. -- Go figure...
>
>Udo 
>
>___________________________________________________________________________
>To unsubscribe send a mail message with a SUBJECT line of "unsubscribe" to
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---
Just Marc  -   [EMAIL PROTECTED]  - ICQ 3888426

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