Disconnects whenever we recieve a call regardless

This is odd behavior; have you tried moving your DSL modem to a different phone outlet in the house? If you do so, make sure to move the filters around appropriately as well; the only type of filter the DSL modem should be connected to are the "Y" type filter that has a "DSL" port as well as a "phone" port.

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Do you have an alarm system? If so, it will need a filter too. Try contacting your alarm company and asking them if the system has a filter installed. If they don't know, try to get inside the control box (the large metal box, not the keypad) and see if there's a filter installed - it should look pretty similar to a regular phone line filter.

If you don't see one, ask your alarm company if you can install it yourself and how to do so, or ask that they install one for you. Be aware though, they may try to charge for a technician dispatch; if the alarm system was installed after you got DSL, insist that they do it free of charge, as the installation technician should've asked whether you had DSL and installed a filter at the time of the alarm installation.

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Also, I might suggest trying to disconnect all phones in the house (at the wall jacks), and then call your home phone from a cell phone and see if you still get disconnected. If you don't, try connecting one phone at a time and repeating this test until you do get disconnected.

At that point, try unplugging all the other phones except the last one you reconnected and test again. If it disconnects when you call, then this phone or its filter is your problem; if it doesn't disconnect, it may have to do with the number of devices attached to your line.

If you've narrowed it down to a single phone/device that is causing the issue, try swapping that device's line filter with another phone's filter that previously tested okay, and plug only the problem device in with the new filter - if your connection stays up when you call, you've got a shorted filter that needs to be replaced. If your connection still drops, there's something with that particular device that's causing issues; you may have to call the manufacturer of the device and see if they've had reports of similar problems.