> Hi James,
>
> It is not unauthenticated, the device must have access to an
> Internet feed, and that feed is always registered or authenticated
> in some fashion.
The "feed" might be, but the mobile user of the "feed" may not be. See
earlier examples.
>
> One of the key proposals of this draft is that the calling device,
> and please do not think phone, think computing device (which might
> be a game console) does register with the ESRP. This relatively
> short-term registration is the way in which call-back is attained.
> The registration can also be used by the ESRP to check that the
> caller is in fact in the calling domain of the PSAP or at a minimum
> where the point of presence in the access network is.
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