VoIP

End-to-end packet delay consists of transmission delay, propagating delay, processing delay, queueing delay, packetization/de-packetization delay, and playout buffer delay. (Sun, 2004)

By using Wireshark, click Telephony-RTP-RTP Streams. Select forward and reverse direction of the VoIP call, you can see Source Address and Destination Address columns. After selecting the two directions, click Analyze.

Sun, L. 2004. Speech Quality Prediction for Voice over Internet Protocol Networks