The FCC is considering Internet telephone tariffs RELATED VIDEO CNN's Don Knapp reports on what could happen if Internet-access fees go up Windows Media 28K 56K

SAN FRANCISCO (CNN) -- The cost of going online could go up significantly if the Federal Communications Commission decides that dialing your local Internet provider is a long-distance call.

The decision may affect not just the 50 million people who use the Internet, but the major advertising business that has grown up around it.

Correspondent Don Knapp has more on the story.