Residential broadband in linux

For more information about community broadband in linux-Linux general technology-Linux technology and application, see the following. I installed ubuntu10 yesterday and used residential broadband. I thought it could be connected with DSL, but I couldn't connect it As a result. I configured it with pppoeconf, then execute the pon dsl-provider and use plog to view the record. The result shows modem hangup. It seems that I am not allowed to dial, because I didn't need to use modem to dial the Community broadband, and pppoeconf had to go through the modem, And I had not done it for half a day. Now I am here to ask for help, I hope the experts can answer this question. Don't copy a bunch of things for me. I tried the online method, no matter how it works! ~
The key is that I don't need to go through the modem. I only have the account and password. I just need to use the broadband connection in the window, but I don't know how to set it in linux!