If it’s not a toll line, it’s a traffic backup.

“Mr. Nordwall has six toll lines out of Delta now,” Salt told the girls jubilantly.

Maybe it's just the ordinary joshing which goes on over the toll lines in the off hours.

Toll lines extend from one exchange district to another, more or less remote, and they are commonly termed local toll and long-distance toll lines according to the degree of remoteness.

The larger corporation built toll lines, connected these smaller systems with one another, and thus made it possible for Washington to talk to New York, New York to Chicago, and ultimately—Boston to San Francisco.