A design study of a Picture Communication Network is presented with special emphasis on those issues that differ from conventional networks. The large amount of data in an image together with the requirement for a rapid respons time make a wide-band transmission medium a nec ssity. The wide-band medium is perceived as a collection of parallel broadcast channels. Four different logical organizations are proposed for t is architecture. Design equations are developed and cost-performance curves are generated. Advantages of one organization over another under different circumstances are pointed out.