I have always hated that the particular display name of "Anonymous" is 
called out in the spec. I think that is wrong, and it should have been 
that if you want your call to be anonymous then you should, among other 
things, not include a display name or else include one of your choice 
that doesn't disclose your actual identity.

But "Anonymous" is in fact singled out. Because it is, it has been made 
a reserved word with a particular semantic. And I think that means that 
a UA is free to render whatever it wants to convey that semantic to its 
user.

This is not such a big deal because there is no normative requirement 
regarding use of display name in general. AFAIK a UA may render it, not 
render it, render some translation of it, or whatever.

        Paul

Smith, Nigel (Com US) wrote:
> Does anyone know of anything to support (or otherwise) the following
> position:
> 
> "It is the responsibility of a SIP UA device rendering a SIP URI
> display-name to a user (e.g. phone display) to deal with any language
> considerations. 
> In particular, the SIP UA device may wish to translate the received
> From: header display-name "Anonymous" (RFC3261 section 8.1.1.3) to a
> language specific display when rendering this information to the user.
> SIP Servers and B2B User Agents should use the display-name "Anonymous"
> in the From: header if the identity of the client is to remain hidden
> and should not attempt to use any other language specific display-name
> to indicate that the identity should be hidden."
> 
> Thanks,
> 
> Nigel Smith
> 
> 
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> 
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