Using 3.0 API "ALTER CALL <id> TRANSFER handle1[, handle2 ..] " , can not transfer an incoming call from Skype 2.5 version. An error will be returned. " Error 592 – ALTER CALL: transferring the call failed".
Use "GET CALL <id> CAN_TRANSFER <Skypename|number>" to retrieve property, will return FLASE.
It's by design or a bug?
Thanks