Ultra Low noise ADSL microfilter ?

[Kendalbeefcake]

Hi

I know this is not strictly the right forum, but I know that there is plenty of knowledge here, so please forgive the off-topicness!

ADSL splitter uses a simple circuit which filter out the DSL frequencies from the audio, Even with the best commercial filter I can find (costing the princely sum of £8), I still get cross talk and echo on my analogue phone which drives my missus crazy.. After all Stan's and others fine work with the "gatorised" caimen, I was wondering if any of the lessons learned there could be applied to building what is effectively a crossover?

The quality of the ADSL microfilters can make massive difference to your broadband connection (it's not snake oil, there is a lot of science behind it) If anyone fancies having a go and breaking one open to have a look for feasibility I'd happily donate a test mule, unless anyone fancies having a go at designing one from scratch??

Piqued anyone's interest or p***** everyone off?

TIA

Kendal

[Alex_UK]

Way beyond my capabilities, but a great idea - who's going to take up the challenge...? :)

[Mark Grant]

Have you tried one of these:
http://www.adslnation.com/phpapps/catalog/product_info.php?cPath=24&products_id=54

or a faceplate:
http://www.adslnation.com/phpapps/catalog/product_info.php?cPath=24&products_id=105

If you have tried those and still have echo or crosstalk maybe its a wiring problem ?

[Kendalbeefcake]

Thanks mate, I've got a XE-1e sat next to me waiting to go in as soon as I get home this evening, I've had a face plate for a while!

I've got a reasonable quality (i.e. not free) one installed ATM and still get issues, I'm hoping the XE-1e is going to sort it once and for all..

I don't think it's a wiring issue as it's relatively modern flat and I still get the cross talk when plugged directly into the back-plate, bypassing the extensions.

Hoping the replacement filter will offer some improvement, but aware that there is a limitation on the quality/effectiveness of a product that can be purchased for £8. Would still be interested to know the thoughts of anyone who knows' what they are doing just having a look to see if there is anything that could be done?

[Mark Grant]

If you have fitted a filtered faceplate you dont need any more filters.

a photo of my filtered faceplate is attached as an example.

the modem cable plugs directly to the faceplate and no other filters are needed as the filter is built into the faceplate.

Only really any use if the modem/router is near the master socket of course.

I also use one of these really short 0.5 metre modem cables:
http://www.adslnation.com/phpapps/catalog/product_info.php?cPath=21&products_id=121
(longer lengths are also on that site)

[Butuz]

I suspect either a wiring issue, or you've missed out a filter on a device (fax, printer, sky box??).

Boggo standard ADSL filters should be all you need. If you need more then there is something else wrong IMHO. Just because it's a new house/flat does not mean it was wired competently....

Butuz

[Kendalbeefcake]

If you have fitted a filtered faceplate you dont need any more filters.

a photo of my filtered faceplate is attached as an example.



Thanks for that, sorry, when you said face plate, I thought you meant one of these:

http://www.broadbandbuyer.co.uk/Shop/ShopDetail.asp?ProductID=8138

Which does still mean that I do need an ADSL filter.

So, I fitted the Xe-1e and it defiantly made a difference on the call quality.

The "free" filter I had I now know was awful..

The "better" one I had which I think I at least paid for did address the issue somewhat and whist there was still come noise, the echo has gone.

The Xe-1e has reduced the noise a lot more, but I need to do more testing. The noise the on ADSL has also been reduced, but it's not really done anything to improve the speeds, the upstream sync has been slowly getting lower every time I fiddle with it.(I think with all the disconnects of late the DSLAM is actually negotiating DOWN my speed rather than up).

What changed was I went from having my Philips DECT connected to the "better" filter in a extension in the bedroom with the ADSL directly connected to the master socket. I've recently purchased a FRITZ!box combined ADSL router DECT phone which means I've plugged everything into the master socket..the dodgy filter I had on there was obviously fine for data but wasn't up to protecting the voice..I also lost Caller-id which only returned once I put in the "better" filter on the master socket.

I don't have a sky box (spits) or anything else connected; as you say the newness of the build doesn't guarantee anything, but until I started moving stuff around there wasn't an issue..

So, my immediate issue is resolved but I'd still be interested to know what could be done to a decent ADSL filter to bring it up to "Audiophile" standards, if anyone fancies taking a look?

[Yomanze]

Hello, please try an I-Plate: http://www.shop.bt.com/products/bt-iplate---bt-broadband-accelerator-58LT.html

[Kendalbeefcake]

Hello, please try an I-Plate: http://www.shop.bt.com/products/bt-iplate---bt-broadband-accelerator-58LT.html

Thanks, I have, that is what I and others were linking too!

[Stratmangler]

What exactly do you mean by crosstalk ?

[Stratmangler]

What exactly do you mean by crosstalk ?

Have you tried the phone direct on the test point inside your master socket ?

http://www.markdee.co.uk/images/Master%20Socket%20-%20Direct.JPG

If you get the crosstalk when you connect just your telephone to this socket then you either have a problem with your phone or with the telephone network.