Siemens Enterprise Communications Siemens Enterprise Communications This document proposes a mechanism for conveying multiple IP addresses of different address families (e.g., IPv4, IPv6) for a given medium, in the same Session Description Protocol (SDP) offer. This proposed mechanism solves the backward compatibility which exists with ANAT, due to its syntax, and provides a migration path towards support for ICE. The proposed mechanism is significantly less complex then ICE or ICE-Lite but uses ICE syntax. The mechanism described in this document has been named ICE-microLite.