There are some system checks you can use to see how good your ISP and Phone lines are.
You either net OEM SR2 or the ISDN Accelerator Pack 1.1 installed
- Make sure SYSMON is installed. You can add this through the Control Panel / Add New Programs
Select Edit / Add Item
Click on Dial-Up Networking Adapter
Select CRC Errors
Click on OK
If you have lots of CRC errors, either the phone lines or your modem is having problems.