Most filters add either capacitive or inductive reactance, or both
to a phone line. When that happens, the frequency response is
impaired. Usually, you won't see much on voice, but it will impact
digital transmissions.
What Bill found would be very normal.
de KL7HF
> I bought two from HRO. One was dead out of the box. The other, when
> installed, screwed up my data connections. Slower connections when I
> could get connected. Taking the filter out fixed the problem. 0 for 2.
>
> There was a company in Texas selling filters a few years back that I had
> excellent luck using. I can't remember the name now. Sorry.
>
> 73
>
> Bill, W4AN
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