Subbarayalu Subbiah wrote:
> hi all,
> What is the advantage of including Reject-Contact header field .According
> to RFC 3841 " Reject-Contact will only discard URIs where the UA has
> explicitly indicated support for the features that are not wanted."
> Reject contact header just act as filter nothing other than that.
>
> instead we can use only ACCEPT_contact header to get the match from the
> target set.so iam little bit confused of why reject contact header is
> included ..
Accept-Contact and Reject-Contact provide essentially the same service -
to categorize contacts in order to select and prioritize the candidates
that will be tried. They differ semantically in the way they do the
categorization. In many cases you can achieve the same objective using
either Reject-Contact or Accept-Contact with negated values. But in
complex cases that is not always the case.
I suggest that you simply use whichever one is most convenient to you.
You can look at RFC 4596 for examples of use.
Paul
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