Dear List,

We are having FreeSWITCH behind AVAYA infrastructure and when FreeSWITCH sends a BYE the From and the To headers are inverted. For example this call was initiated by John Smith however the BYE request has the From and To inverted:

send 619 bytes to tcp/[10.125.15.122]:5060 at 16:57:04.079105:

   ------------------------------------------------------------------------

   BYE sip:5188@10.125.15.122:5060;transport=tcp SIP/2.0

   Via: SIP/2.0/TCP 10.155.20.104;branch=z9hG4bKa99Q7j7crjK9K

   Max-Forwards: 70

   From: <sip:1581@10.155.20.104>;tag=Ze68N90tZ1D0c

   To: "John Smith" <sip:5188@example.com>;tag=54578355~d340a1b2-9d48-464d-9060-03cf872440b9-97644820

   Call-ID: 2ad6b00-ff419a57-85bc53-66199b0a@10.125.15.122

   CSeq: 30379120 BYE

   User-Agent: FreeSWITCH-mod_sofia/1.8.6~64bit

   Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE

   Supported: timer, path, replaces

   Reason: Q.850;cause=16;text="NORMAL_CLEARING"

   Content-Length: 0

These seems to work for Cisco and other Telephony products but not the particular AVAYA system we're working with.

Is there any way to modify this behavior and/or is this a known issue?

Thank you so  much

-- unai

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