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Subject: Re: FILTER for Computer Phone Line
Date: Mon, 6 Jan 2003 21:08:41 +0000
NNTP-Posting-Date: Mon, 6 Jan 2003 21:17:52 +0000 (UTC)
X-Newsreader: Turnpike Integrated Version 5.01 S <8dnav0hwj7jPmXaT+661Vrr+8M>
In article <firstname.lastname@example.org>, Simon
>You might find yourself pushing the limits here
>Modern modems use the entire bandwidth, if you can hear a click or a pop,
>then filtering it out only reduces the amount of bandwidth available.
I agree though before the hom filter windows indicated 33k now it often
shows 37k .
>With 10 miles to the exchange, you could almost make them an offer to run
>fiber to your door :-) and go digital.
No chance, though if I pay a lot of money they could give me a microwave
link to the just visible central distribution tower.
>The best bet is always to find the source of the noise and turn it off.
>Sometimes asking the supplier to swap to a different pair in the bundle
>also help,this has been their hobby for the past 8 years! as it could
be a noisy adjacent pair.. If there are and spares of
>and last option ADSL ? if its available, it uses a different part of the
>spectrum and might solve your problems or at least give you a 256k modem.
Neither home highway or ADSL are available because of the distance.
>"ddwyer" wrote in message
>> In article , Howard Davis
>> >Verizon has repeatedly checked the line, and finds nothing wrong. They
>> >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
>> >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.
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