[SIPForum-discussion] call termination

[Vishwanath Bhat]

Hi Ramesh,


Below is copied form RFC 3261

13.3.1.3 The INVITE is Rejected

   A common scenario occurs when the callee is currently not willing or
   able to take additional calls at this end system.  A 486 (Busy Here)
   SHOULD be returned in such a scenario.  If the UAS knows that no
   other end system will be able to accept this call, a 600 (Busy
   Everywhere) response SHOULD be sent instead.  However, it is unlikely
   that a UAS will be able to know this in general, and thus this
   response will not usually be used.  The response is passed to the
   INVITE server transaction, which will deal with its retransmissions.

   A UAS rejecting an offer contained in an INVITE SHOULD return a 488
   (Not Acceptable Here) response.  Such a response SHOULD include a
   Warning header field value explaining why the offer was rejected.



BR
//Vishwanath


On 12 August 2010 21:24, murali shankar <murali.elangovan at gmail.com> wrote:

Hi ramesh,
>
>                  Here B will send a "busy tone" to A. The ISDN cause code
> is 17.
> Sip response code:487
>
> Correct me if am wrong.
>
> Thanks & Regards,
> Murali Shankar.E
>
> On Wed, Aug 11, 2010 at 11:22 AM, ramesh <ramesh.gowra at gmail.com> wrote:
>
>> dear all,
>> i have small doubt.  A initiate call to B, here B  terminated the call
>> before session established(means while ringing), in this scenario what is
>> response B sends to A.
>>
>> thanks
>> ramesh
>>
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