CANCEL request and Reason header

Call canceling may look like a trivial mechanism, but it plays an important role in complex scenarios like simultaneous ringing (parallel forking), call pickup, call redirect and many others. So, aside proper routing of CANCEL requests, reporting the right cancelling reason is equally important. How to properly¬†handle CANCEL requests in OpenSIPS? According to RFC 3261, … Continue reading CANCEL request and Reason header