I question this. In fact, I question the whole notion of two numbers.

In the below proposal, how would the following be presented to the callee?

        INVITE ...
        To: ...
        From: "George W. Bush, POTUS" <tel:202-456-1111>
        P-Asserted-Identity: "Dave Letterman" <tel:212-555-1234>
        Privacy:none

When offered a trusted identity and an untrusted identity, do you really 
want the UAS to display the untrusted one?

If the above had "Privacy:id", so that the P-Asserted-Identity was 
removed before the request was passed to the UAS, then it might make 
sense to display the value from the From header. But in that case I 
would want some indication of whether or not the displayed value is to 
be trusted.

        Paul

Franz Edler wrote:
>> Yes, I'd looked through those RFCs... I guess the caller ID in the From
>> header should be used to convey CLI displayed to the user and PAI should
>> be used for the ANI?
> 
> Yes. This makes sense.
> I am not familiar with the role of the ANI, but if it corresponds to the
> carrier trusted identity information than it should be mapped to PAI.
> 
> Franz
> 
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