This behaviour is specified by RFC3261. If you want to disable content type validiation there is a setting on the MasterProfile that can be used.
I encountered the problem of sending BYE with the non-standard data to the resiprocate stack. The stack rejects this BYE with 415 error, and I think - it should ignore it
as Content-Type: is application.
At least other stacks handle it properly.
Regards
Irena
At: 11:32:31 INFO - TRANSPORT - --> BYE sip:203@xxxxxxxxxxxxx:5060 SIP/2.0
At: 11:32:31 INFO - TRANSPORT - From: <sip:206@xxxxxxxxxxxxx:5060>;tag=3154f60-3438a8c0-13c4-1796a-7ee1790d-1796a
At: 11:32:31 INFO - TRANSPORT - To: <sip:203@xxxxxxxxxxxxx:5060>;tag=f12f4639
At: 11:32:31 INFO - TRANSPORT - Call-ID: ODA2Y2ViOTEzYzA0Zjk0OTgzZmRkZTE2MmI1NjI4NDE.
At: 11:32:31 INFO - TRANSPORT - CSeq: 2 BYE
At: 11:32:31 INFO - TRANSPORT - Via: SIP/2.0/UDP 192.168.56.52:5060;branch=z9hG4bK-17984-5c2aedf-1539c4c9
At: 11:32:31 INFO - TRANSPORT - Server: Arelnet v5.2.1.2,Arelnet v5.2.1.2
At: 11:32:31 INFO - TRANSPORT - Max-Forwards: 70
At: 11:32:31 INFO - TRANSPORT - Content-Type: application/x-Arelnet;Object=CDR
At: 11:32:31 INFO - TRANSPORT - Content-Length: 267
At: 11:32:31 INFO - TRANSPORT -
At: 11:32:31 INFO - TRANSPORT - LN=30;CLI=203;Ph=206;DNIS=;ORG=1;DSC=1;DSCi=404;DSCp=16;DUR=0;DURs=5;GWo=0;GWt=0;OPCo=67897;OPCt=0;DPCo=12335;DPCt=0;ERR=0;FAX=0;FAXs=0;Pg=0;PgC=0;TimeB=1157358730;USR=;JT=0;TxPk=927;RcPk=927;TxOc=146800;RcOc=146800;LT=0;LOST=0;BR=0;TimeS=0;VAD=0;COD=32;Bdw=80;Cpc=10
At: 11:32:31 INFO - TRANSPORT - TransportUdpEventCallback - sock 27552: notification of network events
At: 11:32:31 INFO - TRANSPORT - <-- SIP/2.0 415 Unsupported Media Type
At: 11:32:31 INFO - TRANSPORT - Via: SIP/2.0/UDP 192.168.56.52:5060;branch=z9hG4bK-17984-5c2aedf-1539c4c9
At: 11:32:31 INFO - TRANSPORT - To: <sip:203@xxxxxxxxxxxxx:5060>;tag=f12f4639
At: 11:32:31 INFO - TRANSPORT - From: <sip:206@xxxxxxxxxxxxx:5060>;tag=3154f60-3438a8c0-13c4-1796a-7ee1790d-1796a
At: 11:32:31 INFO - TRANSPORT - Call-ID: ODA2Y2ViOTEzYzA0Zjk0OTgzZmRkZTE2MmI1NjI4NDE.
At: 11:32:31 INFO - TRANSPORT - CSeq: 2 BYE
At: 11:32:31 INFO - TRANSPORT - Content-Length: 0