[plug] slow data rate

Bernd Felsche bernie at innovative.iinet.net.au
Tue Apr 6 10:20:23 WST 2004

On Tuesday 06 April 2004 10:01, Milan Pospisil wrote:
> I am currently getting some 2.5k bits/sec in average with a 56k
> modem(V.90 Spirit Cougar) when downloading. I have checked the line
> connections in the little white round Telecom connection box as well as
> the contacts in the wall outlet(pin2 +53.6V, pin6 -53.6V) and I have made
> sure that the phone cable(dual twisted pair) does not come anywhere near
> any power cable. I tried to slow down the modem speed to 33.6kbps or to
> speed it up to 115.2 kbps. I did not notice of any difference. I am
> getting the same slow speed with both Xandros and SuSE. Are there any
> other settings, adjustments or facts I should check before I start
> complaining bitterly to the ISP(iPrimus)? Any comment/advice would be
> greatly appreciated.

You should probably try to get a line quality test such as MOLDS (if
your phone line is provided by Helstra) performed.

Some ISPs provide a "line shape" graph you can consult for your
current connection. That's basically a frequency response which
should be fairly flat for optimum throughput. "Notches", sharp low-
or high-frequency roll-off indicate phone line problems.

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