Dial-up forum: Very odd new dialup problem

by: tomluoma March 29, 2012 1:41 PM PDT

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Very odd new dialup problem

by tomluoma - 3/29/12 1:41 PM

Recently my thruput went to hell. (Testing with PCMag Surfspeed2) I was consistently running close to the theoretical maximum -- usually well above 44Kbps. This was with a cheap V.92 Hiro/Conexant Winmodem.

I am now getting 5-10Kbps. I have tested with another Winmodem (Trendnet/Conexant) and two serial controller modems (Trendnet/Agrere and a new USR/Conexant). All V.92 They are near identical in thruput.

If I put the serial units on my laptop they run full bore.

The two computers are loaded with near identical software -WinXP sp3. Tested using the same cables and phone line.

I have cleaned everything out of the registry involving the COM port and old modems that dosen't belong.

The CPU is not tied up and nothing else is running that I can see.

I can only think there is some conflict using resources I haven't found. Or a corrupted driver for some subsystem like the Intel 82801AA or 82820 bridge chips.

Any ideas?

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