Hi All, As per our requirement, when A party send a cancel to B party we do not want "200 cancelling" message from Kamailio. We try to find any high-level flag to disable it. but could not able to find it. Can you please help us on how to achieve this. A Party Kamailio B Party ---------------->INVITE------------------------> <---------180 Ringing<------------------------ ------------>CANCEL--------------------------> <---------200 canceling [we want to suppress this message and do not want kamialio to inform A party about progress status of cancel] <------------OK----------------------------------- Thanks, Amit