|Subject:||Re: [osip-dev] Extend call ringing|
|Date:||Fri, 26 Apr 2013 14:09:18 +0200|
1. If the request is an INVITE that contains an Expires header field, the UAS core sets a timer for the number of seconds indicated in the header field value. When the timer fires, the invitation is considered to be expired. If the invitation expires before the UAS has generated a final response, a 487 (Request Terminated) response SHOULD be generated.
Hi,Please assume the scenario where A calls B. B keeps ringing without answering. B is pre-configured to ring for 20 seconds before dropping an unanswered call. So after 20 seconds B drops call.I would like to know if there is a way in which the caller A can extend the call by sending re-invite so that B keeps ringing for another period. If so, is there a particular format/parameters for the re-invite?[This scenario becomes more meaningful in case when there is an Auto-attendant in between, but let us assume direct call from A to B for now.]Can anyone please tell me if this is possible.ThanksSithara
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