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HERE. (Please note that the Alcatool software is not an Alcatel product, and use of it is at your own risk. Alcatool will NOT work with Speedtouch USB modems.)
If you have a router, temporarily bypass it for this test. Configure your computer to use the local IP address 10.0.0.2, subnet mask 255.255.255.0 with no gateway or DNS. Restart your computer to force the change to take effect. Then start Alcatool, enter the address 10.0.0.138 with no password and click connect. Press the "Line Stats" button the lower right corner then select "Line Info".
METHOD 2: Refer to this FAQ item
Both methods will yield the same result.