voip and stun

[pachock]

hello,

I am having problmes with VOIP and NAT. I was able to get the sjphone to work by adding STUN server in the config but do not see same option for the buil in VOIP config app. I'd like to use build in if possible so I do not hav eto retype all of my contcats. Is it possible to add a STUN server?

Thank you,