Master device must start communicating with a Reset pulse creation before the Slave device receives the Reset pulse, it will generate a Presence pulse in response to a request to begin communicating it.
Master devices need to communicate with the creation Reset pulse when Slave devices receive Reset pulse Presence pulse is generated in response to a request from the communication.
Master equipment to start communication by creating Reset pulse. When the device Slave get Reset pulse will create Presence. Pulse to answer the request start communication.