Re: Clarification on RFC 4458: SIP URIs for Applications suchas Voicemail and Interactive Voice Response (IVR)

Thanks, good point. I was only thinking of the R-URI.

On Apr 8, 2009, at 21:32, "[email protected]" <[email protected] 
 > wrote:

> Hi,
>
> It is certainly true for those parameters in the R-URI but in the  
> History-Info header it is less obivous because if RFC4244 is  
> respected, the retargeting is yet present in a hi-entry (the proof  
> is that the target parameter has not been especially recommended to  
> be used in 3GPP for CDIV service). The benefit to add the target  
> parameter in the R-URI in the hi-entry is to have in the same hi- 
> entry the redirecting user and the cause-param. So that we can be  
> sure of the redirecting user identity (which could be in an other hi- 
> entry than the one "just before"). But after that, it is still  
> necessary to search in hi-entries the entry concerning the  
> redirecting address to have the Privacy indication (eg. to deliver  
> or not the redireting user identity to the diverted-to user) and to  
> know if the retargeting is caused by a SIP response or not (if the  
> Reason header is escaped).
>
> Regards,
> Marianne
>
> -----Message d'origine-----
> De : [email protected] [mailto:[email protected]] De la part  
> de Francois Audet
> Envoyé : mercredi 8 avril 2009 18:10
> À : DRAGE, Keith (Keith); [email protected]
> Cc : Cullen Jennings; Elwell,John
> Objet : Re: [Sip] Clarification on RFC 4458: SIP URIs for  
> Applications suchas Voicemail and Interactive Voice Response (IVR)
>
> I believe the intention was that target was mandatory, but not cause.
>
> I don't believe having cause but not target would make any sense.
>
>> -----Original Message-----
>> From: DRAGE, Keith (Keith) [mailto:[email protected]]
>> Sent: Wednesday, April 08, 2009 09:07
>> To: [email protected]
>> Cc: Cullen Jennings; Audet, Francois (SC100:3055); Elwell, John
>> Subject: Clarification on RFC 4458: SIP URIs for Applications such as
>> Voicemail and Interactive Voice Response (IVR)
>>
>> RFC 4458 defines two SIP URI parameters.
>>
>> I can find no specific language in the document that indicates  
>> whether
>> these two URI parameters can be used independently of each other, or
>> whether there is an expectation that both URI parameters should only
>> exist in the presence of each other. Specifically does an
>> implementation that only includes the "cause" SIP URI parameter and
>> not the "target" sip URI parameter conform to this specification?
>>
>> All the text and examples seem to carry the implication that where  
>> one
>> exists, the other one will also.
>>
>> Could one of the authors or some other interested party clarify what
>> they believe the intention is?
>>
>> regards
>>
>> Keith
>>
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