Data Sheet

6 IO Ninja Hardware Manual (NHM)

Of course, DB9 genders on the serial devices may differ from the above example,

and so your serial arrangement may be different. To aid you in the "wedging

process," each Serial Tap comes with two DB9 gender changers.

Jumper pairs

The Serial Tap has an additional useful feature allowing you to swap and loopback

the signals in TX/RX, RTS/CTS, and DTR/DSR signal pairs. To achieve this, two

jumpers are provided for each of the three pairs. There are three standard jumper

configurations:

Normal — In this position, the lines are arranged in such a way that wedging the

Tap between the serial devices does not change anything. Meaning, TX on one

end goes to RX on another end, and vice versa.

Swapped — This swaps signals in a pair. Meaning, TX goes to TX, and RX goes

to RX.

Loopbacked — Both serial devices "receive back" their own signals. Meaning, the

TX line on each side "comes back" through the RX line.

The following diagram illustrates the jumper arrangements. The diagram shows the

jumpers for the TX and RX signal pair. RTS/CTS and DTR/DSR jumpers work in the

same way.