Re: Just wasted an afternoon - for what??!!! Dedicated DSL line loses sync
- From: Desert Tripper <destrip@xxxxxxxxxxxxxxxx>
- Date: Thu, 06 Oct 2005 16:26:44 GMT
On Thu, 06 Oct 2005 10:35:18 GMT, JimK <1alpha@xxxxxxxxx> wrote:
>On Thu, 06 Oct 2005 00:06:43 GMT, Desert Tripper
><destrip@xxxxxxxxxxxxxxxx> wrote:
>
>>Well, it was supposed to be a rewarding afternoon, if not fun. I got
>>sick and tired of all those silly little filters that have to be put
>>in line with every phone in the house in order to use ADSL. Also, a
>>guy from SBC told me that the more twisted-pair between the demarc and
>>the DSL modem, the better. I have been running all sorts of phone wire
>>around my attic to various rooms and I know a lot of it is not twisted
>>pair.
>>
>>I recently changed ISPs and my old ISP "surprised" me with a $100
>>charge if I didn't return my old modem with filters. That sealed the
>>deal. I was determined to reduce the number of filters on my phone
>>system to ONE, once and for all!!
>>
>>I sacrificed an extra filter I had, soldering wires to the "line in"
>>and "phone out" jack locations, then ran a rather nice 3-pair shielded
>>twisted-pair run directly from the demarc to where my DSL modem is.
>>Then, I wired my neat little modified filter between the demarc and
>>the rest of my interior wiring. "Ingenious!" I thought to myself,
>>expecting to go in and relax with a beer while surfing the web with
>>unprecedented reliability.
>>
>>CRAP! My plan bit the dust when I went inside and found that my modem
>>was dropping sync all over the place. Just as bad as things were when
>>the phone company discovered a bridge tap on my line a few months ago.
>>After disconnecting my "miracle filter" at the demarc, it synced up
>>nicely. Curious, I connected a filter between the DSL modem and the
>>rest of the interior wiring at the modem location, and I continued to
>>get good sync. That's where I left things for now.
>>
>>I am now very, very confused. I always thought one filter at the
>>demarc, with a dedicated direct line to the DSL modem, was the way to
>>go. Now I find it's not the case. At least the second best idea, a
>>dedicated line to the modem with a filter to the rest of the house,
>>seems to work. But why doesn't the filter work outside? Could it be
>>that my DSL modem sees the rest of the interior wiring, on the other
>>side of the filter, as a "bridge tap?" I always thought DSL modems
>>were "blind" to things on the other side of a filter.
>>
>>Has anyone else tried this idea, and succeeded?
>>
>>Just curious!
>
>Filters that go between wall phone jack and phone are low pass audio
>only that block DSL frequencys.
>
>You need an ASDL NID POTS Splitter like below
>http://www.tequipment.net/WilcomADSLPS11.asp
OK I think I'll try one of those. I found a lot of those type of
devices listed on eBay. I take it they have a different sort (or
perhaps more elaborate) filtering scheme than the cheapo
"self-install" type filters? I'm still confused as to why a filter
will work for each telephone individually but not with the voice
network of the house as a whole.
In any case, the "weatherized" outdoor box will give me more peace of
mind than a modded cheapo filter hanging off the demarc.
.
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