ABSTRACT
Pulse Code Modulation (PCM) ....................................................................379 Circuit-Switched versus Packet-Switched Networks ......................................380 VoIP Architecture Concerns .........................................................................383 End-to-End Delay ........................................................................................384 Jitter .............................................................................................................384 Method of Voice Digitization Used ...............................................................384 Packet Loss Rate ...........................................................................................385 Security ........................................................................................................385 Voice Security Policies and Procedures ..........................................................385 Encryption ...................................................................................................385 Authentication ..............................................................................................386 Administrative Change Control ....................................................................387 Integrity ........................................................................................................387 Availability ....................................................................................................387 Voice Protocols .............................................................................................388 The H.323 Protocol ......................................................................................388
