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.