[OpenSIPS-Users] Delete alias references in SIP messages

Klaus Darilion klaus.mailinglists at pernau.at
Wed Aug 13 09:53:01 CEST 2008

Hi Olle!

Do you know any SIP phones which already support updating of the callerid?


Johansson Olle E wrote:
> 12 aug 2008 kl. 23.17 skrev Bogdan-Andrei Iancu:
>> Hi Guillaume,
>> Changing TO header is more or less against the RFC3261 and you should
>> not do it. More or less the same discussion as for the FROM header.
> Actually this is against SIP version 1, not really SIP version 2 in 
> RFC3261.
> There is a new RFC that change the From headers for caller ID
> updates (which is a change of RFC3261 that kept this just for backwards
> compatibility).
>  From RFC4916:
> " This solution involves changing the URI (not the tags) in the To and
>    From header fields of mid-dialog requests and their responses,
>    compared with the corresponding values in the dialog forming request
>    and response.  Changing the To and From header field URIs was
>    contemplated in Section of RFC 3261 [1], which says:
>       "Usage of the URI from the To and From fields in the original
>       request within subsequent requests is done for backwards
>       compatibility with RFC 2543 [6], which used the URI for dialog
>       identification.  In this specification, only the tags are used for
>       dialog identification.  It is expected that mandatory reflection
>       of the original To and From URI in mid-dialog requests will be
>       deprecated in a subsequent revision of this specification."
>    This document therefore deprecates mandatory reflection of the
>    original To and From URIs in mid-dialog requests and their responses,
>    which constitutes a change to RFC 3261 [1]."
> This RFC describes ways to update Caller IDs during a call.
> /Olle
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