rfc9796v2.txt   rfc9796.txt 
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The RCD framework defined both in this document as well as in The RCD framework defined both in this document as well as in
[RFC9795] carries call-specific information. The insertion of RCD is [RFC9795] carries call-specific information. The insertion of RCD is
intended to be singular in that the receiving party should not be intended to be singular in that the receiving party should not be
required to make any call-specific decisions based on redundant, required to make any call-specific decisions based on redundant,
duplicate, or conflicting RCD. The RCD information is either duplicate, or conflicting RCD. The RCD information is either
intended to be added by a party that is authoritative over that intended to be added by a party that is authoritative over that
information or to have been translated from a verified STIR RCD information or to have been translated from a verified STIR RCD
PASSporT and unmodified once in a trusted domain. Any additional PASSporT and unmodified once in a trusted domain. Any additional
parties involved in the call path MUST NOT modify the Call-Info parties involved in the call path MUST NOT modify the Call-Info
header field or add additional Call-Info header fields related to header field or add additional Call-Info header fields related to
RCD. The insertion of the RCD Call-Info header field should be RCD. The trusted and verified caller RCD information inserted in the
considered a trusted action based on trusted information, and the RCD Call-Info header field MUST NOT be modified or altered. The user
information MUST NOT be considered modifiable representing the best should be able to trust that the RCD information accurately
practice of determining the final representation of the caller RCD to represents the verified information. This specification acknowledges
the user. This specification acknowledges that without the use of that without the use of STIR or other mechanisms, detection of any
STIR or other mechanisms, detection of any modifications is not modifications is not possible, so guidance for the use of this
possible, so guidance for the use of this specification in a trusted specification in a trusted UNI part of the network is important.
UNI part of the network is important.
As discussed in [RFC9795], the calling name uses the display-name As discussed in [RFC9795], the calling name uses the display-name
value of the From header field [RFC3261] of the request. value of the From header field [RFC3261] of the request.
Alternatively, for some calls, the calling name may come from the P- Alternatively, for some calls, the calling name may come from the P-
Asserted-ID header field [RFC3325]. While this is out of scope for Asserted-ID header field [RFC3325]. While this is out of scope for
the Call-Info header field in terms of the representation of the the Call-Info header field in terms of the representation of the
display-name value, this document does discuss the representation of display-name value, this document does discuss the representation of
the verification of this value using the 'verified' parameter. the verification of this value using the 'verified' parameter.
For logos or icons that can represent the calling party, the For logos or icons that can represent the calling party, the
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