A signal connector having function of abrupt wave protection is provided with a grounding device on a signal transmitting cable to guide abrupt wave to the ground. During periods of lower network activity, lower congestion andor lower network load, the feedback may direct an upstream flow of packets to be transmitted at a quality of service level that allows consumption of more bandwidth than is indicated by a QoS level associated with a service level agreement of the upstream flow of packets. The method for training players and sportsmen with a piece of sports equipment on a pitch includes carrying out the training on a pitch that is provided with controllable dynamic lighting. In another embodiment, the method includes contacting the monocyte with an additional agent that enhances maturation of dendritic cells or induces immunological tolerance. With the communication established as described, the poll books form a ring network and database information is propagated from poll book to poll book to synchronize the databases between all of the poll books.