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Product Description

The Model 214A allows full duplex transmission up ton 38.4 KBPS over a single twisted. Scrambled data is differentially encoded which serves to make the data on the line polarity independent. The time base for both modems is referenced to a highly stable crystal clock and is phase locked to the received data stream. The signalling rate between Model 214A's is 160 KBPS, and is maintained over distances of 3 miles, on 22 gauge wire, 1.5 miles on 26 gauge wire, at any full duplex data rate from 0 to 38.4 KBPS. Transformer coupling to the line provides the advantages of ground loop elimination and increased resistance to common mode noise. The Model 214A is available with a male or female DB25 connector and both an RJ-11 and screw terminals for the line. Power is supplied from a small wall mounted transformer. Use of the Fastwire Modem on DTE or DCE ports is accomplished by positioning a slide switch to the appropriate position. This has the effect of reversing pins 2 and 3 of the RS-232 interface. The Fastwire Modem is also equipped with a Ready LED which, when illuminated, informs the user that the link between 214A's is established and both modems are operational.

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