I have already read the article before posting here, but I just couldn't understand the purpose of using it. In the article it says,
Disables monitoring of exchanges between a voice over IP or voice over WLAN device and a SIP server. This option should be enabled only when there is no VoIP or VoWLAN traffic on the network.
So, is it just for monitoring? but again you said,
Disabling SIP processing would disable that new conversation and break calls.
So, back to my question again, would it really affect the overall voice quality or performance?
Thanks for your support!