Techniques for minimizing call setup latency are disclosed. According to the present invention, the calcium channel antagonist is prepared by baking a calciferous material of plant origin at a temperature of 500-1000 C. An acoustic wave propagation member has a proximal end and a distal end coupled to the optical fiber. Alternatively, an abrasive product comprises an abrasive component and a filler component that includes at least one member selected from the group a hexafluoroferrate and a hexafluorozirconate. The face has one or more of: a COR of at least 0.