ADSL Modem keeps logging me out when phone is in use

Hi peoples,
My adsl modem keeps logging me out when the phone rings, someone makes a call, and when someone hangs up the phone.
I called up the heldpdesk of my isp, and they've given me these options.
1. Change filters
2. Check pc for virus's
3. Check to see if configuartion is done properly.

Now I've checked throrougly for virus's and there is nothing, the line has always been configured properly, as it has worked fine for the past few months. And I dont understand why they are asking me to change filters when they are the ones that sold me the filter in the first place. Does anyone here have a clue as to what I should do?
ES
elusivesoulAsked:
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publicConnect With a Mentor Commented:
The modem does not just log you out, it probably looses sync.
Typically the cause is a missing or bad filter, MTU installed in the outside NID box, or a line problem.
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AutoSpongeCommented:
Check your wiring.  Make sure that your DSL line isn't split off from the house line.  If you have to, get a new wire drop from the dmarc (box on the side of the house) to your room where you use the line.  Make sure that the house pairs are filtered, the pair to the DLS modem is not.  That's the cleanest way to do it, otherwise you need to filter EVERYTHING on the same pair that's not DSL--which could be multiple phones and will always cause problems when you add another device that isn't filtered.
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elusivesoulAuthor Commented:
Thanks, it was a bad filter afterall. I changed from a netcomm one to a generic one, and it did the job :)
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