Interesting that you bring this up. Assuming my rusty electronics is still
in order, a high resistance loop causes a device(s) to draw more current.
This could be intentional (ie the device was intended to draw that rated
current) or the device is faulty.

Here is a couple of points to ponder (as this can affect normal modem dial
up too)

1) Check how many telephones (or telephony devices ie Fax machines, modems
etc) your friend has plugged in - Reason, every device will draw some of the
current going through the phone line into the house. I can't remember what
the standard voltage/amps is, but it is pretty low. I think Telecom do not
recommend more than 3 or 4 devices per dedicated pair between the house and
the phone exchange. Some people who have 5 or 6 devices in the house on the
same phone line may experience the same issue. (also another potential
problem that does not affect DSL users as you will not be in this situation
is a 1+1 or 0+1 split line and too many devices on each side of the split
can cause this problem)

2) Check that the Sky Decoder modem is Telepermited (it should be). Telecom
have a rigourous process to Telepermit devices to ensure they comply with
the specifications of thier network. Some un-Telepermited devices can draw
more current that can be provided by the circuit which is bad for the whole
system.

3) If point 2 is valid (ie the modem is Telepermited) then it could be a
faulty modem in the sky decoder box drawing more current than it should, in
which case it should be replaced.

Hope this helps

----- Original Message -----
From: "Ian Batterbee" <ian.batterbee@aut.ac.nz>
To: <adsl@lists.unixathome.org>
Sent: Monday, July 15, 2002 7:52 PM
Subject: DSL dropout problem/solution

> I haven't posted for a while, so I thought I'ld share the story of a
friend of mine (who isn't on the list), who recently got DSL and has had no
end of problems with dropouts - usually DSL would bounce within an hour, and
often in much less time.
>
> He followed the correct procedure and rung his ISP, who initially told him
it was a known problem called micro-outages and there was nothing they could
do about it. When he told me this, I told him to call them back and be more
persistant - he did, and they logged a fault with telecom.
>
> Someone came round and looked at it, and determined that the problem was
coming from the modem built into their sky decoder. He was told it was
causing a high resistance loop.
>
> Plugging or unplugging the modem caused DSL to momentarily drop, and
leaving it in there caused it to drop as described above.
>
> Unplugging it completely has left his DSL working for over 50 hours and
counting.
>
> So there you go. Draw your own conclusions.
>
>
>
>
> --
> This message is part of the NZ ADSL mailing list.
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>

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