RFC 4508

Conveying Feature Tags with the Session Initiation Protocol (SIP) REFER Method, May 2006

File formats:
icon for text file icon for PDF icon for HTML
Updated by:
RFC 8217
O. Levin
A. Johnston
sip (rai)

Cite this RFC: TXT  |  XML  |   BibTeX

DOI:  https://doi.org/10.17487/RFC4508

Discuss this RFC: Send questions or comments to the mailing list sipcore@ietf.org

Other actions: Submit Errata  |  Find IPR Disclosures from the IETF  |  View History of RFC 4508


The SIP "Caller Preferences" extension defined in RFC 3840 provides a mechanism that allows a SIP request to convey information relating to the originator's capabilities and preferences for handling of that request. The SIP REFER method defined in RFC 3515 provides a mechanism that allows one party to induce another to initiate a SIP request. This document extends the REFER method to use the mechanism of RFC 3840. By doing so, the originator of a REFER may inform the recipient as to the characteristics of the target that the induced request is expected to reach. [STANDARDS-TRACK]

For the definition of Status, see RFC 2026.

For the definition of Stream, see RFC 8729.

Advanced Search