00455nam a22001217a 4500020002100000082001700021100002100038245006000059260004100119300003300160500002100193650011900214  a8178082853 (pbk)  a621.385bDOU  aDouskalis, Bill   aIP telephony bthe integration of robust VOIP services   aNew Delhi bPearson Education c2000  axxi,331 p.b: ill.c; 23 cm.  aIndex Included.   aTelephony-Communication vSignalling protocols  vMedia transport vVoice quality vCase study vProtocols vFEAS