I replaced the DSL modem with another I purchased from Radio Shack that is compatible with SBC Yahoo (i.e., SpeedStream 4100). Once I installed the DSL Modem, the internet worked.
I then tried to install an Airlink Wireless router 101 to reinstate the wireless connection, to no avail - too technical for me. But now, my Local Area Connection is weird. It jumps in and out making my internet access inconsistent. Every couple of seconds, it will read "Limited or No Connection" then it will read "Acquiring Network Address", then it will re-connect.
SBC Tech Support says it's a hardware issue with my Local Area Network connection because we troubleshot everything they could. The DSL signal is okay, and the modem appears to be working.
How do you resolve the problem with the Local Area Network connection?