VoIP quality issues over VPN

[drwebster93]

Hello,

I recently setup 2 pfsense boxes with an IPSEC site to site vpn so that we could place IP phones in another office that would connect to the phone system at our main office.  I have setup QoS, but we are still having issues with calls fading in and out.  I did a ping test to a host on the other end of the vpn while I was on a call on one of the IP phones and noticed that when the call was cutting out, the response time on the ping would jump from around 20ms to 300-500ms.  Are there any settings that could help smooth out this jitter for better call quality?

Thanks!

[Cry Havok]

What does the bandwidth behaviour look like without the VPN? Without testing that you've no way of knowing if your problem is because of the VPN, or something else…