... VoIP Session, 5 1Voice Coding and Processing Delay, 5 2Voice Envelop Delay, 5 3Voice Packet Loss, 5 5Voice Frame Unpacking and Packet Delay Jitter Bu¤er, 55Management of Voice Quality During a VoIP ... 65Epilogue, 67References, 676 VoIP Deployment in Enterprises 6 8IP- Based Endpoints: Desktop and Conference Phones, 6 9IP- PBX, IP Centrex, and IP- Based PBX Tie Lines, 7 1IP- VPN and VoIP for Tele-Workers, 77Web-Based ... 205xCONTENTSPREFACEIn general, voice transmission over the Internet protocol (IP) , or VoIP, meanstransmission of real-time voice signals and associated call control informationover an IP- based (public or...