Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Icedove/45.1.0
I have an account with ventengo.de and I can make calls, but I cannot
receive calls. With wireshark it looks like linphone ignores the INVITE
packet (captured here: http://bulsa.faui2k11.de/invite.pcapng). In the
log I get one count of "message: Dummy SIP message received" per
incoming call.