1.1 These requirements cover:
a) Discrete electrical products for rescue assistance two-way emergency communication systems,e.g. remote communications stations, master control units and accessories.
b) Electrically- and electronically-operated amplifiers that provide speech communication and distinctive sounds in conjunction with rescue assistance twoway emergency communication systems; and
c) Commercial stationary and fixed power supplies for rescue assistance two-way emergency communication systems, having input and output ratings of not more than 600 V, direct- and alterating-current, (DC and AC).
