MADISON, Wis. (AP) _ Ameritech Wisconsin is suing a competing telephone company and the state Public Service Commission over access to Internet lines.

Ameritech filed a lawsuit Friday in U.S. District Court, saying it should not be forced to pay TCG Milwaukee for handling Internet calls for its customers.

The companies have an agreement spelling out which one can collect money when a call takes place between an Ameritech customer and a TCG customer within Wisconsin, according to court documents.

TCG filed a complaint with public service commissioners, saying Ameritech should pay them for processing calls through service providers and onto the Internet.

The commission on May 15 ordered Ameritech to pay TCG, according to the documents.

Ameritech's lawsuit names TCG and public service commissioners, who regulate utility services in Wisconsin.

The lawsuit says Ameritech's agreement with TCG does not apply to Internet calls. The lawsuit says Internet calls are not local and are usually handled outside Wisconsin.

Ameritech's lawsuit also says the Federal Communications Commission acknowledges that Internet calls are not local.

PSC officials did not immediately return phone messages left at their office by The Associated Press Monday. There was no one available at TCG to comment Monday afternoon.