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

About 15 miles away, in General Electric's Information Processing Center, an electronic computer, programmed to read and sort the Journal's classified ads at high speed, transmitted indecipherable intelligence over the telephone tie line.

From Time Magazine Archive

Delighted to hear such hush-hush information, hundreds rushed to their telephones to pass the time of day with Sir Anthony Eden, succeeded only in clogging the Cabinet Office's tie line to 10 Downing Street.

From Time Magazine Archive

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

From The Shagganappi by Johnson, E. Pauline