Disclosed is a reversing structure for the backrest of a pram. Information is recorded in the ring regions from one end of the ring buffer region to the other end of the ring buffer region and from the other end to the one end in the predetermined order. The PCB in combination with the conductive metal traces can be shaped similar to a conventional two-prong or two-blade connector. The SESE vectors indicate the use of resources by the SESE structures and can be combined by the optimizer to obtain a program vector. The network node can compare the geographic location of the communication device to a geographic location of the network node and generate a location comparison.