Subject: Re: FILTER for Computer Phone Line
Date: Sun, 5 Jan 2003 20:14:41 +0000
NNTP-Posting-Date: Sun, 5 Jan 2003 20:21:24 +0000 (UTC)
X-Newsreader: Turnpike Integrated Version 5.01 S <8dnav0hwj7jPmXaT+661Vrr+8M>
In article , Howard Davis
>Verizon has repeatedly checked the line, and finds nothing wrong. They claim
>the noise is within acceptable limits for a voice line, and make no
>guarantees of useability for a computer. I want to design a passive (LCL)
>lowpass filter for the line, and need the information requested in my post
>to do so.
Im on 10 miles of wire from my exchange. The line is noisy, picks up hum
and clicks from electric fences.
When I upgraded to the best v92? modem THINGS GOT WORSE.
Often no connection could be made, 7k was a typical successful
connection as indicated by windows .
I spoke severely to my pots provider and stated (honestly) that
conversation was difficult and I was losing business as customers with
low signal level could not be understood. Eventually after threats of
legal action they spent weeks up and down the line improving to where
the hum was much better and noise level eliminated. finally they
introduced a hum filter so tha6 the line was near perfect, now I connect
at 37k on the best days , dropouts could by my pop.
Already the hum is increasing as ground resistance changes and the line
balance is upset but still much better.