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Centrex or PBX : the impact of IP /

by Abrahams, John R; Lollo, Mauro.
Material type: materialTypeLabelBookSeries: Artech House telecommunications library. Publisher: Boston : Artech House, c2003Description: xvi, 161 p. : ill. ; 24 cm.ISBN: 158053497X (alk. paper).Subject(s): Internet telephony | Centrex telephone service
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Last Updated on September 15, 2019
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