DSL is coming to my home in five more days and I'm busy wiring things up. Rather than drop $50 on an outdoor DSL splitter or depend on those crappy little filters on every phone, I'm considering punching down a *pair* of those crappy little filters in series (for steeper rejection) before the 66 block in my basement, thereby splitting voice and data signals before they fan out to all extensions. Any opinions? Any advice?

I doubt you need to do anything. When I first received my DSL kit, Verizon also supplied a pair of DSL filters. No rewiring or anything is necessary. By the way you could go to Radio shack if you need additional DSL filters for your other telephone jacks. i_XpUser

You mean, you want to filter the two types before they get to your main phone junction? Don't see why it wouldn't work. But then, I am not a telephone engineer!

Thx for the responses. Actually, what I want to do is put *one* filter bank ahead of *all* my telephones in the house, instead of hanging a filter on each one. With the new service, I need to put in new wiring from the demarc to the basement block (replace the old 1968 crap with CAT5). If I set two filters in series and place them at the block, I am hoping for more than the typical 30 dB of suppression that only one filter would give me. I am still open to any suggestions, information, tips on better approaches et al, and thank you all ahead of time for them.

I think it is a good idea, but I think one filter is enough. As a side note, most cordless phones don't need a filter. Their bandwidth cut the DSL frequencies.