Tie line (telephony)

Short description: Telecomms circuit between exchanges

A tie line, also known as a tie trunk, is a telecommunication circuit between two telephone exchanges or two extensions of a private telephone system.[1][2]

## See also

* Private branch exchange
* Circuit ID
* Leased line
* Private line

## References

1. ↑ Atis, Tie Trunk, http://www.atis.org/glossary/definition.aspx?id=848, retrieved 2015-06-08
2. ↑ YourDictionary.com, American Heritage Dictionary, YourDictionary.com: Tie Line, archived from the original on 2007-06-20, https://web.archive.org/web/20070620202920/http://www.yourdictionary.com/ahd/t/t0208400.html, retrieved 2015-06-07

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