Three level distributed control for networking I/O devices

摘要: A three level network microprocessor based nodal architecture for a fiber optic local area communication system is disclosed in which the processing responsibility establishing voice, video or data link between an initiating I/O device and recipient subsequent two way exchange devices are shared levels of digital capability such manner as to demand least amount time from highest, most intelligent common all thereby making more efficient use its overall supervisory processor. Each whether it be terminal, computer telephone set interfaces with through middle An initial request any at generates interrupt command highest responds interrupt, resulting identification desired station by recalling storage, associated processor, routing information required device. That provided processor completes if it. Otherwise addresse identifying codes communicated third responsible effecting actual communication.