VOIP in a Nutshell

SIP Protocol Stack

VOIP Codec Comparison

Codec Data Rate Typical Datagram Size Packetization Delay
G.711u 64.0 kbps 20 ms 1.0 ms
G.711a 64.0 kbps 20 ms 1.0 ms
G.726-32 32.0 kbps 20 ms 1.0 ms
G.729 8.0 kbps 20 ms 25 ms
G.723.1 6.3 kbps 30 ms 67.5 ms


Author: Chathura Ariyadasa

A highly talented IT professional with extensive experience and capabilities in performing a variety of IT Security, Computer Networking and IT Help Desk duties and responsibilities in the IT Department.