[asterisk-users] (slightly OT) SIP redirect

[Philipp Kempgen]

Does anybody have some pointers on what a SIP user agent should do
on receiving a 3xx redirect?

RFC 3261 does not go into much detail ("to be tried", "SHOULD retry").

Should the UA prompt the user for confirmation?
That seems important since the new address might involve a route
with higher cost.


http://tools.ietf.org/html/rfc3261#section-13.3.1.2
---cut---
13.3.1.2 The INVITE is Redirected
   If the UAS decides to redirect the call, a 3xx response is sent.
   ... SHOULD contain a Contact header field
   containing one or more URIs of new addresses to be tried.
---cut---

http://tools.ietf.org/html/rfc3261#section-21.3.3
---cut---
21.3.3 302 Moved Temporarily
   The requesting client SHOULD retry the request at the new address(es)
   given by the Contact header field (Section 20.10).  The Request-URI
   of the new request uses the value of the Contact header field in the
   response.
---cut---


    Philipp Kempgen
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