ADSL filters

The lesson of this tale is if you lose your internet connection* and the phone say in the living room is no longer working the first thing you should do is check the master socket - anyway the one in the hall usually by plugging the phone directly into that and seeing if its live.
In fact it was "terminally intermittent" it came on for ten seconds and then was lost again.
If its live, what you *shouldn't* do next is try and trace miles of cabling which has been there for maybe 20 or more years which goes all over the house behind furniture etc. moving piles of stuff which have accumulated in the interim in the process. And then let despair place its icy hand on your shoulder as you contemplate having to trace the fault somewhere Somehow. Days, weeks, months ?
In fact the next thing you should have done was check the ADSL filter which was plugged into the master socket by plugging the phone into that and see if the phone is still live.
Whoops !
So those piles of spares that have sat in the draw have finally found a use.
It would appear a faulty* ADSL filter on the master socket can knock out everything at a stroke. Including the "unofficial extensions" ran off it maybe 30 years ago
Obvious really in retrospect. Five minutes Googling would probably have sorted it all out.
michael adams
* again how it developed a fault having sat in the same place totally unmolested for years is another matter.
...
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
michael adams wrote:

Lightning nearby?
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

No recent lightening so far as I know. But thanks for the hint.
As according to some sources at least, apparently ADSL filters can be very sensitive to spikes in the voltage coming down the telephone line.
So there may have been gradual deterioration before the actual failure.
michael adams
...
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload


No they arent, they are entirely passive devices.

You don’t see that either. If you did, the modem synch rate would gradually degrade over time, and it doesn’t.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

insulation can break down if the spike is big enough.
--
from KT24 in Surrey, England
"I'd rather die of exhaustion than die of boredom" Thomas Carlyle
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload


You don’t get spikes that big on the phone line.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

The BBC transmitter on the Isle of Lewis had a "spike" come into the transmitter hall down the phone line and cause thousands of pounds worth of damage. They really can be BIG
--
from KT24 in Surrey, England
"I'd rather die of exhaustion than die of boredom" Thomas Carlyle
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload


But those don't degrade an adsl filter, they blow it to bits.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On 06/08/18 20:54, charles wrote:

I had a 'spoke' so big it burned out the telephone line, half te computer equipment connected to it and some of the carpets.
And blew a TV socket out of the wall.
--
Canada is all right really, though not for the whole weekend.

"Saki"
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On 06/08/2018 23:53, The Natural Philosopher wrote:

Pah - that's nothing. We had a spike that demolished the whole village and left a 500m wide by 100m deep crater.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On 07/08/18 13:20, Andy Bennet wrote:

And that was just before breakfast...
--
In todays liberal progressive conflict-free education system, everyone
gets full Marx.
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
says...

We had two customers about 2 miles apart affected by the same storm. In the worst case, the TV aerial vaporised, the inside of the VHF tuner was incinerated, the consumer unit blown off the wall and the phone service died over a half mile radius.
In the other house, the TV had been unplugged from the wall.
Two neat holes were drilled through the paxolin panel in the tuner on which the isolator components were mounted, the mains switch contacts were welded together and an arc jumped from the plug lying on the floor to the wall socket and blew the fuse in the consumer unit.
--

Terry

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Considering how simple they are, I'd have to say I've come across far more ADSL filter failures than I would have expected.
Many people nowadays no longer have a phone plugged in at all. In this case you can remove the filter completely and plug the ADSL modem straight into the line (will probably need a different lead or adapter). You might get better ADSL speed. The filter is only required if you also have phone handsets connected.
--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On Sun, 5 Aug 2018 09:34:48 -0000 (UTC), snipped-for-privacy@cucumber.demon.co.uk (Andrew Gabriel) wrote:

IME if you are on the broadband limit a quality filter also makes a big difference though probably not so much where the speed is already good. I recall going from about 1mbps to around 3.5mpbs and had one of the best speeds going in the village.
--
AnthonyL

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

I'm not on any limits as far as I know. I never bother about speeds just so long as its possible watch news clips and Youtube clips etc without any buffering. However since fitting a new filter its noticeable that some sites seem much quicker to load (its probably tempting fate just to mention this) Filters are the sort of thing you just fit and forget. But according to some sources at least they can be very sensitive to any spikes coming down the telephone line and can fail or in this case gradually deteriorate as a result.
michael adams
...
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On Mon, 6 Aug 2018 14:01:23 +0100, michael adams wrote:

To some extent yes, but they aren't all created equal. Many moons ago I did the research on what was (then) the "best" face plate ADSL filter. Bought the one that had the most consistent good reviews, fitted it. Yep during the day if allowed good speeds maybe 500 to 1000 kbps faster than the fliter I was using. But at night it couldn't sustain that rate and the modem would retrain to below the rate the other filter could sustain day or night. The modem wouldn't retrain back up at dawn either so you were "stuck" at the lower rate.
--
Cheers
Dave.
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

might that not be caused by the overloading of the local network?
--
from KT24 in Surrey, England
"I'd rather die of exhaustion than die of boredom" Thomas Carlyle
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On Mon, 06 Aug 2018 14:46:40 +0100, charles wrote:

ago

the

wouldn't

rate.

What has that got to do with the speed that the modems have negociated as the best they can do for the line conditions? ie layers 1 and 2.
--
Cheers
Dave.
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
wrote:

Nope, that wont cause the modem synch rate to drop.
That must be due to some effect on the joints in the street cabling.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On 06/08/18 14:46, charles wrote:

Nope. training speed is a measure of signal to noise. AM radio after dark is the killer.
Filters should do NOTHING to the line->router - they only affect line-> telephone.
If you have no phone you need no filter at all.
--
Climate Change: Socialism wearing a lab coat.

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.