Black Box KV6104SA-R2, Manual

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SERVSWITCH™ DUO AND SERVSWITCH™ QUADRO
3. Run the serial cable from the host PC’s serial port to the DB9 female
COMM port on the rear panel of the Duo/Quadro. If your PC’s serial port is
a DB25 male connector rather than a DB9, you might need a serial adapter
such as our product code FA521A.
4. There is also a 2-position DIP switch labeled “R U” on the rear panel. Move
position 2 of this switch (the right-hand one labeled “U”) to the ON (down)
position to set the Duo/Quadro to “upgrade mode.”
Figure 5-15. The Duo’s/Quadro’s DIP switch.
5. Power off the Duo/Quadro by unplugging its power supply (or both supplies,
if you’re using two).
6. While position 2 of the DIP switch is still ON, plug one or both power supplies
back in. The Duo/Quadro will power up in “upgrade mode.” The USER
7-segment LED should now show a lowercase “u” to indicate that the
Duo/Quadro is ready to be upgraded:
ON = Go into upgrade mode at power-up
OFF = Operate normally at power-up
USER
LED
Reserved for future use; do not change setting