Re: [Ecrit] High-Level Requirements section (<draft-schulzrinne-ecrit-requirements-01.txt>)

[Ted Hardie <hardie at qualcomm.com>]

At 11:19 AM +0200 8/9/05, Tschofenig, Hannes wrote:
>   R6.  Incremental Deployment The output of the ECRIT mapping protocol
>      will be one or more URIs that can be used as the target of an
>      emergency communication.  These must be usable by an appropriately
>      capable device even if that device has no knowledge of the mapping
>      protocol.  As an example, if the mapping protocol returns a SIP
>      URI any SIP-capable phone should be able to use it as a target of
>      the call; no special extension to SIP should be required.
>
>
># R6 does not seem to be a requirement or it is, at the moment, not
>phrased as one.
>

The requirement is that what the mapping protocol returns be in
the standard format for the communication protocol; that is, it should return
something in a SIP context that *any* SIP capable phone would be able to use--it
should not have special purpose URIs or schemes as its output, since
those would not be understood by "legacy" SIP devices.  I think it is reasonably
clear on that point.  In some sense it is a constraint rather than a requirement,
but I think it is important to capture somewhere.
			regards,
				Ted Hardie



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