Arrays of cation-exchanged beads loaded with ferroin immersed in the Belousov-Zhabotinsky (BZ) reaction mixture, show, not only a phase propagating mode among the beads, but also a switching among such the several modes. A modified Bru¨sserator equation leads an equation set of phase deviations of these beads which includes a dynamical matrix; it can explain the switchings. ©2000 American Institute of Physics.