> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dean
> Willis
>
> I had thought Adam was changing the From header field in the
> authentication server, which would confuse RFC 2543 style gateways.
>
> Rather, he is suggesting that SRTP-DTLS compliant gateways add a
> parameter to their From header field that indicates the identity was
> received PSTN and should be treated accordingly.

I think they should add it as a URI-param, or even URI-username param.  Both 
because it's about the type of username or URI itself, and because then rfc4474 
would actually include that param in its signature, so no one in the middle 
could change it.  Of course that uri-param already exists: user=phone.  Or is 
that not the right semantic?

-hadriel
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