The Digi C/CON-16 / 50000584-01 Concentrator is a complete subsystem with its own 80C186 microprocessor. 128K of RAM and 16K of EPROM. 16C554 quad UARTs for the sixteen EIA-232 asynchronous serial ports. and a high-speed 85C30 serial communications controller with full duplex DMA support for communication with the host adapter and other concentrators. The concentrator receives packets of data from the host adapter at data rates of up to 1.2 megabaud. then distributes the data. as appropriate. to the sixteen EIA-232 ports. Data received by the EIA- 232 ports is similarly packetized and sent to the host adapter over the high-speed synchronous line. The EIA-232 ports operate at data rates of up to 115.200 baud. Multiple concentrators may be daisy chained together. and with standard wiring. concentrators may range up to 300 meters (1000 feet) from the host adapter.
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