Hi, everybody !
We have a problem with call hold / call transfer function with phone Snom 870.
When subscriber tried to make call transfer, Snom sends Re-Invite with SDP header «Media Attribute (a): sendonly»
Yate answers 200 Ok without indication of rfc3264 support (header "a=sendonly/sendrecv/recvonly" is missing)
As a result, Snom disconnects the call by SIP BYE …