SWITCHING ARRANGEMENT FOR TELEPHONE EXCHANGE-INSTALLATION

摘要

A telephone exchange installation wherein information is transmitted between a central control mechanism and individual apparatus over a two-stage transmission network including buffer storage means interposed between the two stages. Information is transmitted in parallel code between the buffer storage means and the individual apparatus which utilizes relatively inexpensive and relatively slow-working switching elements. Information is transmitted in series code between the buffer storage means and the central control mechanism which utilizes electronic, relatively fast-working switching elements. Optimum utilization of the telephone exchange equipment is thereby achieved by adjusting for the differing speed of operation of the switching elements in the central control and the individual apparatus and the resulting variance in the speed of information transmission.