carrier **
common carrier

Only a few of these lines survive as commercial common carriers.

African and Indian immigrants are the most common carriers, she said.

But we're not supposed to act as common carriers, and I have a schedule to keep.

That is, essentially they would be considered a common carrier and not responsible for the actions of people using their service.

But the Internet needs to be a common carrier.

The phone companies may already serve as common carriers of video signals.

These are not common carriers, so the general public cannot travel using these.

And there's a formal definition for what a common carrier is.

A common carrier offers its services to the general public under license or authority provided by a regulatory body.

Internet networks are, however, already treated like common carriers in many respects.