An asynchronous control mechanism packet is used to send control messages and information to one or more bridge devices within a network of buses of devices. The asynchronous control mechanism packet is addressed to a device on one of the buses and is intercepted by one or more appropriate bridge devices...http://www.google.cl/patents/US6445711?utm_source=gb-gplus-sharePatent US6445711 - Method of and apparatus for implementing and sending an asynchronous control mechanism packet used to control bridge devices within a network of IEEE STD 1394 serial buses
