Hi I am trying to set up a IP based fax 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 apckets capture in the windows machine where fax was installed. There is a monodirectional RTP from fax to cube. I have attached a screenshot here. Has anyone idea where teh fax is stucking ? If you need i can provide debug ccsip message logs.
On the voice gateway you must enable T.38 and fallback to G.711 passthrough in global configuration mode (G.711alaw in the examples)
Then a dial-peer must be added to route incoming faxes to ipFax. The session target points to the IAS machine and the codec is g711alaw.