CENTREX or PBX
Subtitle: The Impact of Internet Protocol
Publisher: Artech House Publishers
Published: March 2003
Language: eng
Format: Hardcover
Number of pages: 182
ISBN-13: 9781580534970
Subjects: Computer Communications & Networking; Telephone technology; Technology; Internet - General; Computer - Internet; Science/Mathematics; Telecommunications; Centrex telephone service; Internet telephony
First sentence: Centrex service was launched in the early 1960s and thus has a 40-year history in the telecommunications industry.