Since a few moth I have problems with my ADSL line:
1) it disconnects very often without reason
2) it disconnect when I receive a call
3) the connection speed was slower than expected
Finally, after lots of trouble I buy this splitter
and now the line is stable and fast as expected however it still drop when I receive a call. Actually, the splitter is used as a filter, just before the modem, I want to insert it at the beginning of the phone line as soon as possible and I hope that this solve definitively my problems.
This kind of splitter seems to be quite good compared the typical filter/splitter that you find in the shop, it also have a specs sheet, here is it