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echo: hs_modems
to: MARK SHEPPARD
from: RICHARD TOWN
date: 1997-04-15 12:52:00
subject: Line conditioning

 -=> Quoting Mark Sheppard to All <=-
 MS> years  now, and I run two 33.6 USR Sportster modems on it.
 MS> I've been having some intermittent line noise problems here and have 
 MS> had the phone company check the lines, with no luck.  Mostly what I 
 MS> notice here is people across certain local prefixes have more problems
 MS> than callers from other prefixes, with line noise.  
 MS> My question here is:  Is there some device I can use to condition my 
 MS> lines
Try testing your system from the nearest phone jack to your telco
junction box.  Disconnect all other devices from all other house
telephone outlets.  Do you actually _hear_ this noise?  Dial a 0 or
1 only and listen.  Do you hear burps, crackles and pops?  If so, it's
usually down to your 'phone company to fix
Restricted bandwidth resulting in low-speed connects is not something
your telco can do much with since they only generally guarantee line
quality capable of providing some 9k6 bps.  However, if you can demonstrate
you're unable to get clear faxes, then the telcos seem to jump to that
complaint.
 MS> and/or alter the db level to improve upon the lags and loss of
 MS> carrier my callers are getting?
You can ask your telco to switch off your AGC at the exchange or
if your modem allows this, reduce your transmit level to -12dbm
 MS> phone company do with the db level that would help?   Or would they 
 MS> even do it for residential phone lines?
Some telco's do offer to "data condition" a line, but that costs
rgdZ
Richard
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