I'm using Linphone with a keyyo SIP account.
when I call people using a softphone, everything works correctly.
When I call someone with a physical sip phone, the call is aborted when my correspondent hang on.
When the same correspondent calls me from the same phone, everything works correctly.
In the logs, I get "
ERROR Incompatible SDP answer received, need to abort the call" when the calls fails.
I do not find anything else interesting in the logs… anything I can investigate?