What if you want to use sips where possible but don't mind a fallback
to sip?
So, if someone makes a call using sips in request URI and
the called person doesn't have a sips URI registered, I guess the
proxy will return 404 not found.
So then then caller might say, ok, there isn't a sips URI, I will now
try a sip URI and see if that works.
The problem is that the called person might not have registered anything
at all. So in such cases, the 2nd call attempt using sip is a waste.
Is there a requirement for some kind of new SIP response code which
says something like "no SIPS URI registered but there is a SIP one"?
What are the potential problems with this idea?
Regards,
Attila
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