A Tie Line, also known as a tie trunk, is a communication connection between extensions of a private telephone system, typically two PBXes.
See also
References
- ([dead link] – Scholar search) Atis.org: Tie Trunk, http://www.atis.org/tg2k/_tie_trunk.html, retrieved on 2007-03-20
- ([dead link] – Scholar search) YourDictionary.com: Tie Line, http://www.yourdictionary.com/ahd/t/t0208400.html, retrieved on 2007-03-20
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