Maximize Dial-up Modem Settings:
Win XP , just hold down the Alt key and double-click "My Computer" to bring up System Properties. Click the "Hardware" tab, then choose the "Device Manager" button. Scroll down to "Modems" and click the little (—) to show your modem, then double click it.
Selecting the "Modem" tab will allow you to adjust the port speed.
Usually, the Maximum Port Speed is on the highest setting (115,000 bps), but sometimes you will find it on a slower default of 9600 bps. If you have a 56k modem, you can crank it up to the maximum setting without any trouble (in most cases). If you live in a cave and have a 28k modem, then the fastest you can do is 57,600 bps.
To check/adjust the Receive-Transmit buffers in XP, click the "Advanced" tab of your modem properties then choose the "Advanced Port Settings" button. Make sure that both are set to their highest settings.
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