I am on 2D and we finally have a landline up and running. When you pick it up, it kills the internet, no access at all until 30 seconds or so after you put the phone back on the hook. Now I know you need filters on all lines. The landline and router are in two different rooms. The Landline has a filter on it, one slot for Phone, the other for ADSL. I have tried a few filters with the router, but the internet wont connect at all, as if the filters are "blocking" it from connecting. I have also tried double filters, tried connecting both the landline and router in the same filter, but the phone is dead and internet wont connect. I have varying brands of filters, D-Link, TP-Link and another I cant remember the name of right now.
The router 2D gave me is a fritzbox, so do I need a specific brand of filter?