00927nam a2200253 a 4500 vtls000092442 KUKTEM 20251125103140.0 151201t2015 flua f 001 0 eng d 9781498701037 (hbk.) 201602181127 saini 201512011554 faiz UMP TK5105.8865 .D67 2015 Dornheim, Sandra Managing the PSTN transformation : a blueprint for a successful migration to IP-based networks / Sandra Dornheim Boca Raton, FL : CRC Press, 2015 xxxiii, 201 p. : ill. ; 24 cm. Includes index Internet telephony Systems migration Management Internet telephony Economic aspects Telephone systems Technological innovations 0 0 0 0 20000 20000 2019-09-04 284.27 0 TK5105.8865 .D67 2015 0000107311 2019-09-04 00:00:00 1 284.27 2019-09-04 OPEN VIRTUA40 82679 82685 VTLSSORT0080*0200*0400*0900*1000*2450*2600*3000*5000*6500*6501*6502*6503*9992