SIP Call-Info Parameters for Rich Call Data
RFC 9796, “SIP Call-Info Parameters for Rich Call Data”, is a Proposed Standard document published in July 2025 by C. Wendt, J. Peterson. The canonical text is published by the RFC Editor.
Abstract
This document specifies a usage of the SIP Call-Info header field that incorporates Rich Call Data (RCD) associated with the identity of the originating party in order to provide to the terminating party a description of the caller (including details about the reason for the session). RCD includes information about the caller beyond the telephone number (such as a calling name, logo, photo, or jCard object representing the caller), which can help the called party decide how to handle the session request.
This document defines three new parameters 'call-reason', 'verified', and 'integrity' for the SIP Call-Info header field and also a new token ("jcard") for the 'purpose' parameter of the Call-Info header field. It also provides guidance on the use of the Call-Info 'purpose' parameter token, "icon".
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
The canonical text of RFC 9796 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
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