U.S. Converters XetaServer XS1200, Руководство по установке

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Making a loop-back test
To test if the XS1200 is working correctly and the drivers and cabling has been successfully setup you
can make a loop-back test. This will verify if you can send and receive data both ways, from LAN to serial
and serial to LAN.
To confirm that the XS1200 can send and receive data you now need to connect the TX pin to the RX pin
(pin 3 to pin 2) at the DB9 connector on the XS1200. The easiest and safest way to do this is by making a
loop-back plug from a female DB9 connector or terminal header such as pictured below:
If you do not have any of these available you can manually make a connection from pin 2 to pin 3 at the
DB9 connector by carefully using a piece of wire or even a paper clip to short the pins, as shown in the
image below. Be careful not to short any other pins since this might damage the adapter.