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DOI: https://doi.org/10.17487/RFC6157
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This document describes how the IPv4 Session Initiation Protocol(SIP) user agents can communicate with IPv6 SIP user agents (and viceversa) at the signaling layer as well as exchange media once thesession has been successfully set up. Both single- and dual-stack(i.e., IPv4-only and IPv4/IPv6) user agents are considered. [STANDARDS-TRACK]
For the definition ofStatus,seeRFC 2026.
For the definition ofStream, seeRFC 8729.