Found this blog post on the SIP diversion header and had to share it, really good explanation of exactly when it's used, his reading of the RFC is most enlightening:
- A change to the ultimate destination endpoint of a request. A change in the Request-URI of a request that was not caused by a routing decision. This is also sometimes called a deflection or redirection.
- A diversion can occur when the “user” portion of the Request-URI is changed for a reason other than expansion or translation.
- A diversion can occur when only the “host” portion of the Request-URI has changed if the change was due to a non-routing decision.
In other words, some sort of forward set on the users phone.
https://andrewjprokop.wordpress.com/2014/09/22/an-introduction-to-the-sip-diversion-header/
Thanks for the shout-out!
ReplyDeleteThis is another important topic related to Diversion. https://andrewjprokop.wordpress.com/2014/09/29/the-great-sip-history-info-battle/
No problem Andrew you deserve it! Thanks for the other great follow up too, I plan to do a SIP post where i go through the common things people change on SIP gateways like early offer etc, your diversion post really helped explain why people add a SIP profile to change the diversion header.
DeleteI have added you to my blog roll I hope you do the same :) Can I ask out of curiosity how did you know that my site was linking to yours does Wordpress tell you?
Kind Regards
Peter Revill
I see all the refers that my blog gets. Some I already know about (Avaya, No Jitter, AudioCodes, etc.), but every so often I see a new one that looks interesting. I appreciate the links and make an attempt to let the linkers know.
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Quite a very interesting event because I could not find much useful information on this issue.
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