Customer Switching Systems
Charles Breen · Bell System Technical Journal · 1971
Many customers for Picturephone® service will likely be business and industrial enterprises, having PBX, centrez, or key telephone service. This paper discusses switching systems for business customers, and describes how Picturephone service will be added as a natural extension of telephone service. This paper also serves as an introduction to the detailed papers which describe each of the customer switching system Picturephone arrangements.