This document specifies an application-level protocol (i.e., payload type) for hand-raising tools using the Real Time Protocol for Distributed Interactive Media (RTP/I). RTP/I defines a standardized framing for the transmission of application data and provides protocol mechanisms that are universally needed for the class of distributed interactive media. A hand-raising tool can support collaboration between spatially separated users. In a video conference, for example, a hand-raising tool can be used to coordinate different speakers. This documents specifies how to employ a hand-raising tool with RTP/I and defines application data units (ADUs) for hand-raising tool operations. This protocol definition allows standardized collaboration between different hand-raising tool implementations
