[VOIPSEC] How QOS of VoIP call is measured

[Bincy K. Philip]

Hello ,

I need to know QOS measurement details of VoIP calls.
For meauring QOS of a VoIP call using SIP or H.323, any additional protocol support have to add in the application.
I mean, how the QOS measurement tools works and gives the QOS measured value.
I got familiar with free tools like WinEyeQ  and VQmanager(only for SIP).In the same setup different applications/softphones gave different values.How it works?


Thanks & Regards
Bincy K Philip