There is a problem placing outgoing calls when using Telephone on Mac together with FritzBox Devices from AVM. It seems that, for whatever reason, the G.722 Codec is chosen instead of G.711. When situation is other way round, it works.
other VoIP Clients (e.g. Jitsi), where the G.722 Codec can be disabled specifically, do not have this problem. So it seems really to be a Codec problem.
Please integrate the option to choose Codecs.
Same here. Fritzbox 7390.
The fritz.box logged codec G.711 for outgoing calls with Telephone.App 1.0.4
Add an ability to use only G.711 codec
Next release of Telephone will be linked against the newer version of PJSIP – 2.1, which may help here.
If it doesn’t help, it will be possible to use only G.711 codec. This must override the problem.
Confirmed fixed with checkbox checked.