Hi

As per RFC 3261
-------------------------------------------
21.3.5 380 Alternative Service

   The call was not successful, but alternative services are possible.

   The alternative services are described in the message body of the
   response.  Formats for such bodies are not defined here, and may be
   the subject of future standardization.
---------------------------------------------

380 is a valid SIP response. As per the above explanation, call was not 
successful but some alternate service is possible that is mentioned in the 
message body of the response.

My query is that on receiving 380 response, what should be the possible handling
  1. Terminating the call and initiating new request for alternate service 
after interpreting the message body.
  2. Redirecting the Call request to redirect server (if it is provided in the 
response)

Can someone provide a call flow example of 380 response.

Regards

Anuradha Gupta
Aricent


-----Original Message-----
From: Iñaki Baz Castillo [mailto:i...@aliax.net]
Sent: Friday, March 27, 2009 2:53 PM
To: Anuradha Gupta
Cc: sip-implementors@lists.cs.columbia.edu
Subject: Re: [Sip-implementors] SIP 380 response

2009/3/27 Anuradha Gupta <anuradha.gu...@aricent.com>:
> Hi
>
> What should be the handling for SIP 380 response? Should it be handled as 
> other 3xx response or it should be treated as a call failure.

380 is not a response code, but a warning code defined in:
  http://tools.ietf.org/html/draft-ietf-sip-sips


 -------------
   Upon receiving a 416 response or a 480 (Temporarily Unavailable)
   response with a Warning header with warn-code 380 "SIPS Not Allowed",
   a UAC MUST NOT re-attempt the request by automatically replacing the
   SIPS scheme with a SIP scheme [...]
---------------


--------------
9.  IANA Considerations

   This specification registers two new warning codes, namely 380 "No
   SIPS Contacts Registered" and 381 "SIPS Required".  The warning codes
   are defined by the following information, to be included in the Warn-
   codes sub-registry under
   http://www.iana.org/assignments/sip-parameters.

   380  SIPS Not Allowed: The UAS or proxy cannot process the request
        because the SIPS scheme is not allowed (e.g., because there are
        currently no registered SIPS Contacts).

   381  SIPS Required: The UAS or proxy cannot process the request
        because the SIPS scheme is required.
-------------


--
Iñaki Baz Castillo
<i...@aliax.net>

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