My CME system is behind a cisco 857 running nat. I'm only getting 1 way audio when connecting to my sip provider.
I'm guessing the rtp stream is not getting through my nat?
Does anyone know which ports to forward and how to forward the ranges on my cisco nat device?
Or is there a way of faking the source ip address of my cme system (currently on 192.168.x.x range) so it send it's public ip instead (I've configured PAT on nat device to give cme a public ip) and thus bypassing the nat all together?
Thanks in advance