Adsl rj11 through various converters and slow speeds

We have our business adsl backup running but the connection was around a Meg.
Setup is:  router - rj11 - rj11 to bt converter - to bt extension lead - to adsl filter - to double bt adapter (with phone connected here) - to bt socket.
Should this work or not?
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Davis McCarnOwnerCommented:
Your phones need a filter; the DSL modem does not.  Also, because most phone wires are of low quality, you should have the DSL modem plugged directly into a wall jack with as short a wire as possible.
Craig BeckCommented:
If you plug the BT extension lead into the filter you'll be filtering out the DSL signal (assuming you're using the actual phone socket and not the RJ11 socket).

Also the filter should connect to the master socket first, then extend from that.  You'll need an extension for both phone and DSL cables separately.  If you connect a filter at the end of the extension instead of at the beginning the DSL signal will get interrupted.

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Reading TFM procedure should be applied. Especially around second picture. You dont need to assemble a puzzle of all cabling you got at home.

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David Johnson, CD, MVPOwnerCommented:
The dsl information uses high frequencies so one adds the lo-pass filter prior to the device that a human uses so that the human doesn't hear these frequencies but the dsl modem needs these frequencies so do not have the filter before the dsl modem.
Craig BeckCommented:
You MUST place a filter before the modem as it provides the RJ11 socket.
David Johnson, CD, MVPOwnerCommented:
I disagree about putting the filter before the modem as with the filter in place the modem will not get the frequencies required for it to operate.
Craig BeckCommented:
David I think you misunderstand somewhat.

A DSL filter provides a BT socket and a RJ11 socket.  The filter won't filter out the DSL signal if you connect the modem via the filter's RJ11 socket but it will if you connect via the BT socket.

The point about using a filter, particularly in the UK, is that BT don't provide a dedicated DSL port on their boxes so to get the RJ11 socket you need to use a filter.

To clarify, I'm not saying you have to filter the DSL signal.
CHI-LTDAuthor Commented:
bought and ran a longer rj11 to rj11 lead from the filter to the router.  speeds jumped up from a couple of meg to 17..
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