Jonathan Rosenberg writes:
> Sorry for the long delay in replying, Juha.
no problem.
> When there
> exists a feature tag that describes a capability that can also be
> represented with a SIP header field, a UA MUST use the header field
> to describe the capability. A UA receiving a message that contains
> both the header field and the feature tag MUST use the header field,
> and not the feature tag.
i'm not sure if the above makes sense at least in methods vs. allow
case. since an invite, for example, can contain many contacts each with
different set of supported methods, a single allow header cannot be used
to describe the situation.