I have trouble to get linphone to work behind fritz.box router.
General Config: FritzBox Cable 6591 SIP-Provider: easybell (Trunk) Setup phone-Number in Fritz.Box, and setup Linphone to use this Fritz.Box-Account (#620). I've figured out following: I can call numbers, and the pick up the line. I see the time-counter running, but hear nothing at all. If I talk into my mic, I can hear myself. If I open Fritz.Box setting and set Fritz.Box-Portforwarding this way, that the IP of my PC where my Linphone runs is directly connected to the internet, I got sound. So the question is, which port has to be forwarded to make Linphone work with audio... and why does there be needed an port-forwarding, if at least Linphone connect to the Fritz.Box internal Sip, instead directly to easybell. Hope somebody can help me with this.
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