T
Twayne
Bruce Chambers said:
The two most important items for transmission are line quality and modem
matching, in that order.
If a voice line is audibly quiet, without any popping, snapping, static
or buzzes, or hearing anohter call's talking. the phone company is not
likely to do anything. However, if there is any audible noise on the
line, the line is not meeting the FCC Quality standards. Or if the
noise happens to for instance be coming from a neighbor's improperly
installed alarm system, electric fence, whatever, the phone company
won't do anything about that, BUT they WILL tell you what the source of
the noise is.
Just do NOT let them into your house, garage or any part of the
building or you'll be charged for a service call.
Ideally, you will get the best speeds and through-put achieved by using
the same brand modems the ISP uses. They're usually happy to share that
information with you and if, as they often do (but they'll use the same
modem chipsets), they have two basic brands, they'll tell you which
access number goes to which brands. You can't really do that with a
winmodem though; you have to know the chip-set used (Rockwell, etc..)
Unfortunately winmodems are notorious for achieving highest speed
connections at more than a mile or so from the Central Office. With
winmodems you'll often get the best throughput by noting the highest
connection speed achieved and then knocking it back one notch in the
speed settings where there will be less distortion on the line and fewer
packets having to be resent. Also don't forget the winmodem is using
the computer's RAM and processor since it doesn't have its own, so that
can add to the problems if running multiple applications. A modem SHOULD
get priority affinity but it's not really a given.
Next would be setting the MRU etc. for optimums matching the buffer
sizes for the speed range chosen.
And after that it's mostly a crap-shoot.
HTH,
Twayne`
