Hi I am trying to set up a IP based fax ( Imagicle ) but each time the status show unknown. We have no call manager and the deployment is over virtual router ( csr100V). The following is the command that i deployed on cube : Whenever i gives a call to the destination number ( Fax number ) , there is no any fax tone. It rings for the first time and after some time it fails. SIP signaling is working well, but then media RTP is not working. I have captured wireshark capture in the windows machine where fax was installed. The codec used is g711alaw. There is a monodirectional RTP from fax to cube. I have attached a screenshot here. Has anyone idea where the fax is stucking ? i have provided debug ccsip message logs here. Can anyone please help me?