Connecting ADSL modem far from the wall socket

Hi,

I have been stuck on this one for days now. I have a standard telephone line with BT adsl broadband. Two faxes and a franking machine also use this line through a 3 way splitter.

I have just bought a D-Link 604+ wireless adsl router, which needs to be in a central location in the house for best signal (I have a large house). This is how i first tried connecting my new router.

                   adsl port -> 25 meter cable -> wireless adsl router
wall ->filter-{
                   phone port  -> 3 way splitter -> fax
                                                             -> fax
                                                             -> franking machine

With the wireless router I need a 25 meter extension cable running from the filter, but the modem only connects for about two seconds and then disconnects.

Then I tried plugging the adsl filter on the other end of the extension cable and it works fine, but the faxes are now plugged straight into the wallsocket via the 3 way splitter, so they cut the internet out when they are used. This is how they are connected now...

                                                                         adsl port    -> wireless adsl router
                               -> 25 meter cable -> filter -{
wall -> 3 way splitter -> fax                                 phone port  -> nothing
                               -> fax

Notice i have to leave out my franking machine unless i get yet another splitter. I have also tried taking all other devices out to test the modem on its own in this configuration.

Any ideas on the best way to get all the devices working together will be really aprecated!