Centrex (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Centrex" in English language version.

refsWebsite

Global rank English rank

3books.google.com

3^rd place

3^rd place

2web.archive.org

1^st place

1^st place

1themuseumoftelephony.wordpress.com

low place

low place

1networkworld.com

4,121^st place

2,662^nd place

low place

low place

books.google.com (Global: 3^rd place; English: 3^rd place)

Wittenberg, Nicholas (2009-02-19). Understanding Voice Over IP Technology. Cengage Learning. p. 367. ISBN 9781111806613.
Abrahams, John R.; Lollo, Mauro (2003). Centrex Or PBX: The Impact of IP. Artech House. Chapter 1, Introduction to Centrex. ISBN 9781580536226.
Horak, Ray (2012-11-19). Telecommunications and Data Communications Handbook. John Wiley & Sons. Section 3.3.1 (Features). ISBN 9781118585801.

networkworld.com (Global: 4,121^st place; English: 2,662^nd place)

Reed, Brad (February 13, 2012). "Centrex: It's alive (for now)!". Network World. 29 (3): 10. Archived from the original on 3 July 2013. Retrieved 22 February 2012.

themuseumoftelephony.wordpress.com (Global: low place; English: low place)

"Telephony 101: Centrex". The Museum of Telephony. 2016-07-09. Retrieved 2019-01-04.

tiaonline.org (Global: low place; English: low place)

"TIA'S 2009 ICT MARKET REVIEW AND FORECAST" (PDF). The Telecommunications Industry Association. 2009. pp. 3–20. Archived from the original (PDF) on 2018-05-21. Retrieved 2012-02-22.

web.archive.org (Global: 1^st place; English: 1^st place)

Reed, Brad (February 13, 2012). "Centrex: It's alive (for now)!". Network World. 29 (3): 10. Archived from the original on 3 July 2013. Retrieved 22 February 2012.
"TIA'S 2009 ICT MARKET REVIEW AND FORECAST" (PDF). The Telecommunications Industry Association. 2009. pp. 3–20. Archived from the original (PDF) on 2018-05-21. Retrieved 2012-02-22.