192.168.100.1/, that page should give you all your signal levels.
To check the signal level on the Toshiba models:
With Win9x/ME systems: Go to your Control Panel then click on the Network icon. On the Configuration tab, click TCP/IP (your Ethernet adapter), then click Properties. On the IP Address tab select "Specify an IP Address" and enter an IP address of 192.168.100.2, subnet mask of 255.255.255.0 and default gateway 192.168.100.1. OK and Reboot.
With XP systems: Go to your Control Panel then click on the Network Connections icon. Click on Local Area Connection. Next, Click the Properties button. Select Internet Protocol (TCP/IP). Enter an IP address of 192.168.100.2, subnet mask of 255.255.255.0 and default gateway 192.168.100.1
Now open your browser and enter »192.168.100.1 in the address bar.
After you have reviewed your signal pages go back and mark the TCP/IP Properties of your adapter to "Obtain an IP Address Automatically" then reboot.
Your signals should be as follows:
Downstream Power: You normally want anything between -12db and +12db. Most modems are rated from -15 to +15. Anything more or less than that and you may experience quality issues.
Downstream SNR: This number is best over 30, but you may not have any troubles with it down to 25. Anything less and you will most likely have slow transfers, dropped connections, etc.
Upstream Power: The lesser this number is, the better. If it is above 55, you may want to see if you can reconfigure your splitters. Anything above 57 is not good and should be fixed right away.
Upstream SNR: Anything above 29 is considered fine. The higher this number is, the better. If this number is below 25 and 29, you have noise leaking in somewhere. If it's anything less than 25, you want to get it fixed as you may have a lot of packet loss or slow transfer rates.