It also means the DSL signal isn't going through your entire house which can also decrease total attenuation in both directions. The DSL signal is pretty fragile.
I have one of these -
DSL POTS Filter/splitter Indoor/Outdoor Whole House - eBay (item 350040113181 end time Mar-30-08 11:50:09 PDT)
EDIT: The problem is that most Telcos won't install these unless you make a really big scene. I installed my own. But it does require you to run your lines into the DSL box (either using taps or putting the filter closer to the wiring entrance) and it requires you to install a jumper from the NID into the filter. It's pretty trivial, and it's only 50V, so it won't really zap or harm you, but it does require some time and effort, especially running the new line into the house for your DSL feed. You can put the DSL signal on the outside (yellow/black) pair, but you don't REALLY want to do that..
I have one of these -
DSL POTS Filter/splitter Indoor/Outdoor Whole House - eBay (item 350040113181 end time Mar-30-08 11:50:09 PDT)
EDIT: The problem is that most Telcos won't install these unless you make a really big scene. I installed my own. But it does require you to run your lines into the DSL box (either using taps or putting the filter closer to the wiring entrance) and it requires you to install a jumper from the NID into the filter. It's pretty trivial, and it's only 50V, so it won't really zap or harm you, but it does require some time and effort, especially running the new line into the house for your DSL feed. You can put the DSL signal on the outside (yellow/black) pair, but you don't REALLY want to do that..