The OPC90 Server enables seamless DCS access to the Bailey Controls Command Series, NETWORK 90, INFI 90 and Symphony Plus Distributed Control Systems. The server can communicate at the network level via the appropriate Computer Interface Unit (NCIU0X), Plant Loop to Computer Interface (INPCI0X), Infi-net to Computer Interface (INICI01, INICI03, INICI12, INICI13, IIMCP01/02, SPIET800, ICI800, IET800, PNI800) or, within a single Process Control Unit, via a Computer Interface Command (CIC01), Serial Port Module (NSPM01, IMSPM01) and Computer Port Module (CPM02/03). RS232, SCSI and Ethernet is supported. The bottom line is OPC90 can communicate with all interfaces available for NETWORK 90 / INFI 90, Symphony Plus and Command Series Distributed Control Systems. System integrity, functionality, and data throughput is maintained by utilizing standard exception reporting techniques. Bandwidth improvements are realized over existing Bailey use of these same hardware interfaces by implementing dual channel capability and redundant interfaces.