DSL line question-Verizon-filters [telecom]

[Michael]

I just replaced my Verizon modem...they sent me a new one because the
old one would periodically drop signal, and had to be re-booted each
time. As a followup they called my today to check that everything was
OK. They ran a line test because they said they weren't seeing a
perfectly good line. I disconnected everything from the demarc and
the number that had been 1400, was now perfect, around 3500. Not sure
what that means, but she suggested replacing all my DSL filters...they
go bad she said. I have about 10 in the house, including some that
serve more than one device, e.g. caller id boxes, wireless phones,
answering machine, etc.

Do the filters go bad? I occasionally will hear some DSL noise
when two phones are off - hook at the same time. Otherwise everything
seems to work OK.

They scheduled to call back in a week to see if there's an
improvement. I have some new filters, never used, that I could put
in. I'd welcome any comments.

[Doug McIntyre]

Michael <michael....@gmail.com> writes:
>Do the filters go bad? I occasionally will hear some DSL noise
>when two phones are off - hook at the same time. Otherwise everything
>seems to work OK.

Yes, filters can go bad. So can phones, water meters hooked to phone
lines, alarm systems, etc. They may be causing problems with the DSL
signalling, but still pass voice frequencies okay.

With this sort of thing, it does become the game of unhooking one
thing and trying again, over and over again.

[Rich Greenberg]

In article <fbb321f9-f8b1-4586...@l3g2000vbv.googlegroups.com>,

This has been covered in the digest before. To summarize, the best
thing you can do is put 1 filter at the demark, and unless you have all
home run wireing already and can isolate the jack with the modem, run a
seperate wire from the demark (before the filter I just suggested,
or from the unfiltered jack of the filter) direct to the modem.

At my previous house, I had done that and on a service call for an
unrelated problem, the tech saw it and said "I can do better". He then
replaced part of the demark with a terminal block with a filter built
in.

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[David Clayton]

On Wed, 11 Apr 2012 13:53:35 -0700, Michael wrote:
.........

> They scheduled to call back in a week to see if there's an improvement. I
> have some new filters, never used, that I could put in. I'd welcome any
> comments.

Put in one central filter at the demarc and run the modem directly off it.
It is ridiculous to have so many separate filters.

--
Regards, David.

David Clayton
Melbourne, Victoria, Australia.
Knowledge is a measure of how many answers you have, intelligence is a
measure of how many questions you have.

[Ron]

Michael <michael....@gmail.com> wrote:
> Not sure
>what that means, but she suggested replacing all my DSL filters...they
>go bad she said. I have about 10 in the house, including some that
>serve more than one device, e.g. caller id boxes, wireless phones,
>answering machine, etc.

If your house has one DSL jack and one phone jack, it makes some
sense to put a filter on the phone jack. This doesn't really
describe most homes, though. It seems like a crazy idea to have a
house with one DSL output and lots of analog outlets and put filters
on all lines but one.
As long as at least one of your filters is questionable, you might
want to consider a DSL splitter. The phone line comes into the
house, goes to the splitter, and one line goes out for DSL and all
the rest of the phone wiring goes to the non-DSL output contacts.

--
Ron
(user telnom.for.plume
in domain antichef.com)

[Andrew Carey]

On Apr 11, 2012, at 1353, Michael wrote:

> I disconnected everything from the demarc and the number that had
> been 1400, was now perfect, around 3500. Not sure what that means,
> but she suggested replacing all my DSL filters...they go bad she
> said. I have about 10 in the house, including some that serve more
> than one device, e.g. caller id boxes, wireless phones, answering
> machine, etc.

She's giving you the resistance measurements in kohms. 1500 kohms is a
possible high resistance condition but you really need more
information. Measurements are made tip-ring, tip-ground, ring-ground
and a few others and the individual values are reported along with an
overall characterization of the line test. Without knowing those and
no apparent problems with your voice calls, I wouldn't necessarily
worry about it.

Troubleshooting physical DSL trouble remotely is kind of
difficult. Can she pull your DSL connection stats? Is the SNR
dropping? Better to have a tech with a good meter take a look at your
SNI and then at the modem jack to see what's going on.

10 splitters is kind of a high number and you're possibly seeing some
reflectance. If possible I would isolate the run to your DSL modem
from the other runs at the SNI and put a single filter for your phones
there. There are SNI modules available that do filtering right in the
SNI now. Don't know if Verizon can put one in but that would be ideal.

[David Lesher]

Michael <michael....@gmail.com> writes:


>Do the filters go bad? I occasionally will hear some DSL noise
>when two phones are off - hook at the same time. Otherwise
>everything seems to work OK.

Can you put one filter in near the demark, put all the phones
downstream of it; and have the modem on an unfiltered branch?

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[Bruce Bergman]

Yes, the filters do go bad, and if you have several voice extensions
in the house the "Bridge Tap" effects of all that wire with DSL
signals reflecting back can kill your data speed just as badly as it
does when it's on the outside plant cabling.

I'd strongly suggest you get the Incumbent Telco to install a single
Whole House DSL Filter and block the signal right there at the
Demarcation Point from all but the one inside wire line and jack you
will use the DSL Modem on. You'll see an even bigger speed jump
because you eliminated all the stub antennas (mini bridge taps) at
your end, and the speed should stay consistent. Plus you don't have
to mess with all those inline filters at every phone anymore.

And if they won't (or can't) rewire the demarcation point to add the
Whole House Filter, you might have to get it done by a local
independent technician or DIY it. The Telco is supposed to rework a
messy demarc to add a MPOE Subscriber Test Point, and a clueful
installer can easily do the whole house filter at the same time. (And
a lazy one will blow it off, do the bare minimum and go take a nap in
his truck...)

Worst case, you can use one of those in-line filters, a pair of 6"
modular line cords, a wall jack and a weatherproof box to build your
own Whole House Filter if you don't want to search down the
purpose-made units. Exact same function, just a different form
factor.

--<< Bruce >>--

[Rich Greenberg]

In article <CACqS804MTBX-CZ4RgzZ6axW4LD86xxyco1tW8qeVc=SmQw...@mail.gmail.com>,

Bruce Bergman <bruceb...@gmail.com> wrote:

>I'd strongly suggest you get the Incumbent Telco to install a single
>Whole House DSL Filter and block the signal right there at the
>Demarcation Point from all but the one inside wire line and jack you
>will use the DSL Modem on. You'll see an even bigger speed jump
>because you eliminated all the stub antennas (mini bridge taps) at
>your end, and the speed should stay consistent. Plus you don't have
>to mess with all those inline filters at every phone anymore.

The way I originally did just this (see earlier post) was that I had a
multi-line NIJ (previous owner had multiple lines, I had only one) and
the filters I had had 2 jacks, one filtered, one not. I removed the
active line from the NIJ, plugged the filter into the NIJ, and plugged
the active line into the filtered jack. Then I moved the line going to
the DSL modem to another set of terminals and plugged its plug into the
unfiltered jack.

BTW, I have some unneeded DSL modems. One is hard coded for BellSouth,
One for Earthlink. If anyone can use one of them, its yours for
whatever it would cost me to mail it to you. I also have a fancier one
available. See http://www.zoomtel.com/products/5690.html and email me if
interested.

[Koos van den Hout]

Ron <r...@see.below> wrote in <qsreo7lo7oq9ftu72...@4ax.com>:

> As long as at least one of your filters is questionable,

Lightning can also damage them and cause DSL signal degradation.

> you might
> want to consider a DSL splitter. The phone line comes into the
> house, goes to the splitter, and one line goes out for DSL and all
> the rest of the phone wiring goes to the non-DSL output contacts.

In this country (the Netherlands) the standard setup is to have a DSL/phone
splitter as close to the entry point for telephony as possible and have
an as short as possible cable between splitter and DSL modem, to improve
DSL performance.

Koos van den Hout

--
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ko...@kzdoos.xs4all.nl
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