Centrex or PBX the impact of IP /

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Bibliographic Details
Main Author:	Abrahams, John R.
Corporate Author:	ProQuest (Firm)
Other Authors:	Lollo, Mauro
Format:	Electronic eBook
Language:	English
Published:	Boston : Artech House, c2003.
Series:	Artech House telecommunications library.
Subjects:	Internet telephony. Centrex telephone service. Electronic books.
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