tie line

American  

noun

Telecommunications.

1. a line that connects two or more extensions in a PBX telephone system.

2. a private telephone channel, leased from a telephone company, that connects two or more PBX systems.

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tie line British  

noun

1. a telephone line between two private branch exchanges or private exchanges that may or may not pass through a main exchange

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Example Sentences

Several local organizations offer fishing, and the Brooklyn Bridge Park Conservancy has joined them this summer with these free drop-in rod-and-reel clinics, which teach participants how to tie line knots, bait hooks and cast.

From New York Times • Aug. 8, 2019

If you tie line to the loop on one end, the prop locks up and takes the spin out of the line clockwise.

From Washington Times • Jul. 4, 2014

A telephone tie line from the suite to Washington was used, but all local calls were made from phone booths.

From Time Magazine Archive

A limousine driver named Frank Musicaro, 48, was placing a call on his tie line to Dispatcher Jeanne McDonald.

From Time Magazine Archive

The horse had not an inch of halter or tie line on him.

From The Shagganappi by Johnson, E. Pauline