00573 a2200181 4500 BKB 142051 20200902165907.0 9781118019214 004.695 F61V Flanagan, William A. VOIP and unified communications: internet telephony and the future voice network by William A. Flanagan Hoboken John Wiley & sons 2012 298p. Computer Science Internet telephony; Multimedia communications 21832 21832 0 0 0 0 CURAJ CURAJ 2014-03-12 0.00 0 004.695 F61V 18194 2024-11-21 2020-09-02 BK