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Article #17939

Re: Sportster 33.6 External high pitched "noise"

#17939
From: Paul Higginson
Date: Sat, 01 Feb 1997 00:00
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In article <IkfW$DA$ll8yEwjU@t5net.demon.co.uk>, Nick P
<Nick@t5net.demon.co.uk> writes
>>
>The new November issue Sportster Voice 33.6's appear to connect more
>often at 33.6 as opposed to ones made before then.
>Getting a 33.6kbps connection is down to you line quality. If you have a
>very old line, there is not much chance of 33.6. Another reason could be
>other devices on the same line (i.e. extension phones). Get BT to
>install a brand new line for you and then make this the dedicated line
>for your modem. With a dedicated line for the modem you should get
>perfect connects every time at 33.6kbps. I use this method and in about
>50 connects I have only had 2 connects at 31,200 - the rest being at
>33.6k.

All

I can sort of go along with this, I played around with some equalisation
of my line and I must admit to getting better results.

I found that lowering the HF response slightly , 10pf and 10Kr across
the slave pair from the btbox produced about 20% more successfull
connects at 33k6 than before.

Link statistis show an improvement from 38db snr to 43dbsnr.

I eventualy ran out of patience and set s33=32 and I now get 99%
success. ( thanks whoever posted that tip )

It was always the intention to fit a dedicated line , So till my new
line is fitted , I will run like that. 

Its easy to blame everyone else, but as they say:-

Common faults occur commonly.

Now what was that about signature separators?

-- 
Paul Higginson
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From: Paul Higginson <paul@greenrover.demon.co.uk>
Subject: Re: Sportster 33.6 External high pitched "noise"
Date: 1997/02/01
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