This Recommendation specifies a peer activity management protocol (PAMP). The purpose of a PAMP is to collect and exchange peer activity status information. A PAMP is used among a peer activity management server (PAMS)@ an overlay management server (OMS)@ and the peer@ which are involved in managed peer-to-peer (P2P) communications. The scope of this Recommendation covers: ?C the requirements of a PAMP based on [ITU-T X.609]; ?C the protocol operation of a PAMP; ?C the messages and parameters used by a PAMP.