Telepon: Perbedaan antara revisi
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Baris 89:
* Huurdeman, Anton A. (2003), ''The Worldwide History of Telecommunications'', IEEE Press and J. Wiley & Sons, 2003
* Mike Sexton & Andy Reid (1992), ''Transmission Networking: SONET and The Synchronous Digital Hierarchy'', Artech House Boston London.
== Pranala luar ==
* {{en}} [http://www.corp.att.com/history/history1.html/ sejarah perusahaan telekomunikasi Bell]
* {{en}} [http://searchunifiedcommunications.techtarget.com/sDefinition/0,,sid186_gci212388,00.html/ sejarah The American Telephone and Telegraph Company]
== Lihat pula ==
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