Sierra Video View MADI-XX - Manual (Page 36)

SIERRA VIDEO
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Serial port assignments
Jumpers JP1 and JP2 are located on the RS232 pcb at the rear of the unit. Access requires the
removal of the top cover with the power removed as explained in the 'Removing the top cover'
section.
JP1 – DTS/RTS select (normally no jumper)
JP2 – Half duplex jumper on 1 & 2; Full duplex jumper on 2 & 3
Note: Pin 1 is the first left most pin of each three pin block.