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Num Mark Subjects (1-7 of 7) Year Entries
133 Found
1 Internet telephony.   99
2 Internet telephony -- Computer programs.   3
3 Internet telephony -- Economic aspects. : Managing the PSTN transformation : a blueprint for a successful migration to IP-based networks / Sandra Dornheim, Deutsche Telekom AG. [O'Reilly electronic resource]  2015 1
4 Internet telephony -- Examinations -- Study guides.   21
5 Internet telephony -- Handbooks, manuals, etc. : The Droid pocket guide : ginormous knowledge, pocket-sized / Jason D. O'Grady. [O'Reilly electronic resource]  2010 1
6 Internet telephony -- Management. : VoIP performance management and optimization / by Adeel Ahmed, Habib Madani, Talal Siddiqui. [O'Reilly electronic resource]  2010 1
7 Internet telephony -- Security measures.   7
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