00661    a2200181   4500003000500000005001700005010001700022020001500039040000900054082001800063100002100081245012100102260002900223300001800252505015800270650003400428700001700462Nust20221212123548.0  a  2004026217  a8178082586  cNust  a621.38212,HER  aHersent, Olivier  aIP telephony :bpacket-based multimedia communications systems /cOlivier Hersent, David Gurle and Jean-Pierre Petit  aPearsonbNew Delhic2003  axviii, 456 p.  aSection 1.The Application Layer IP Telephony Protocols (Page-1), Section 2. Voice Technology  Background (Page-195), Section 3. The Network (Page-293).    aTelecommunication engineering  aGurle, David