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The Telecom Digest for April 14, 2012
Volume 31 : Issue 94 : "text" Format
====== 30 years of TELECOM Digest -- Founded August 21, 1981 ======
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Date: Thu, 12 Apr 2012 22:11:27 +0000 (UTC)
From: richgr@panix.com (Rich Greenberg)
To: telecomdigestmoderator.remove-this@and-this-too.telecom-digest.org.
Subject: Re: DSL line question-Verizon-filters
Message-ID: <jm7jue$lo8$1@reader1.panix.com>
In article <fbb321f9-f8b1-4586-a384-3700c0e1b020@l3g2000vbv.googlegroups.com>,
Michael <michael.muderick@gmail.com> wrote:
>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.
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.
--
Rich Greenberg Sarasota, FL, USA richgr atsign panix.com + 1 941 378 2097
Eastern time. N6LRT I speak for myself & my dogs only. VM'er since CP-67
Canines: Val,Red,Shasta,Zero,Casey & Cinnar (At the bridge) Owner:Chinook-L
Canines: Red & Max (Siberians) Retired at the beach Asst Owner:Sibernet-L
Date: Thu, 12 Apr 2012 20:15:38 -0400
From: Ron <ron@see.below>
To: telecomdigestmoderator.remove-this@and-this-too.telecom-digest.org.
Subject: Re: DSL line question-Verizon-filters
Message-ID: <qsreo7lo7oq9ftu72h0lrmp7hkb1p2918k@4ax.com>
Michael <michael.muderick@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)
Date: Fri, 13 Apr 2012 08:39:40 +1000
From: David Clayton <dc33box-usenetcdt@yahoo.com.au>
To: telecomdigestmoderator.remove-this@and-this-too.telecom-digest.org.
Subject: Re: DSL line question-Verizon-filters
Message-ID: <pan.2012.04.12.22.39.39.234015@yahoo.com.au>
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.
Date: Thu, 12 Apr 2012 17:34:39 -0700
From: Andrew Carey <carey@ar-ballbat.VALID-IF-THIS-IS-ELIDED.org>
To: telecomdigestmoderator.remove-this@and-this-too.telecom-digest.org.
Subject: Re: DSL line question-Verizon-filters
Message-ID: <D6647226-ADD6-485E-B8B3-F0E26D2FE664@ar-ballbat.VALID-IF-THIS-IS-ELIDED.org>
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.
Date: Fri, 13 Apr 2012 04:04:28 +0000 (UTC)
From: David Lesher <wb8foz@panix.com>
To: telecomdigestmoderator.remove-this@and-this-too.telecom-digest.org.
Subject: Re: DSL line question-Verizon-filters
Message-ID: <jm88kc$cpv$1@reader1.panix.com>
Michael <michael.muderick@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?
--
A host is a host from coast to coast.................wb8foz@nrk.com
& no one will talk to a host that's close........[v].(301) 56-LINUX
Unless the host (that isn't close).........................pob 1433
is busy, hung or dead....................................20915-1433
Date: Fri, 13 Apr 2012 10:48:11 -0700 (PDT)
From: HAncock4 <withheld@invalid.telecom-digest.org>
To: telecomdigestmoderator.remove-this@and-this-too.telecom-digest.org.
Subject: Cellphone thefts increase in L.A.
Message-ID: <213c38ad-a543-4014-9d7e-4977705ed626@w5g2000vbp.googlegroups.com>
>From the Los Angeles Times:
"Police in downtown Los Angeles have seen cellphone thefts soar 32% as
smartphones like the IPhone become easily turned into pay-as-you-go
phones. Police said phones are being commonly snatched from
restaurant tables, libraries and nightclubs as people leave them
unattended."
for full article please see:
http://latimesblogs.latimes.com/lanow/2012/04/cell-phone-thefts-on-the-rise-in-downtown-la.html
-or-
http://tinyurl.com/7t3a63w
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