Orange The Static Context Header Compression (SCHC) framework identified the need for a minimal transport encapsulation that provides Session multiplexing when extrinsic Discriminators are insufficient. This document specifies a Link Multiplexer (VOICI) that addresses those SCHC-driven requirements while remaining general enough to accommodate other compression mechanisms and uncompressed payloads. The encapsulation is designed for minimal overhead, reducing to 1 byte in the common case (7 inline Session IDs), while supporting optional integrity protection and original EtherType/port recovery.