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+1 (217) 579-80452 Quad 16C950 UART Serial Ports over PCI SlotPCI 32-bit, PIO Mode with 133MB/S BandwidthSupports RS-485 Auto Transceiver Turn Around by Unique Featured ATTA?v HardwarePCI IRQ Sharing Feature Eliminates IRQ Conflicts8 x DB9-male Connectors with DB62M Octopus Cable4-wire RS-422 and 2-wire RS-485 applicationsSupports 128-Byte Deep FIFOSupports Baud Rate up to 921.6Kpbs