Hello,
Encountered a problem with weird behavior of Dialogic HMP while handling incoming fax call over SIP. The provider's gateway after the first INVITE sends the 2nd one with more specific call settings. But HMP thinks that the 2nd INVITE is wrong and rejects it with the SIP 488 error. Then the gateway sends BYE cause he decides that the call was abandoned and breaks the session.
Is there a workaround to make HMP handle the 2nd INVITE politely?
I attached here the rtflog file and wireshark log file