In the previous recipe, we talked about signaling, that is, SIP and RDP. In this recipe, we will see how to use the voice or video call itself and see what might go wrong with it.
It will always start with a user complaining about voice or video quality, low speech quality, noises, and so on.
Also, don't forget that it might look like everything works fine in Wireshark, but further tuning of the IP PBX should be done say to increase the transmit volume.
When facing problems on a specific client, connect Wireshark to the client port with a port mirror. When facing problems with all clients connected to the same link, connect Wireshark to the link with a port mirror.
To locate performance problems, ...