# Does this wiring pattern for a DB9 cable exist as a standard cable?

I have a scientific instrument that uses a DB9 cable to connect to the standard RS232 port on a computer for communication. I've deconstructed one of the cables as I needed to make another one but I am wondering if this wiring pattern is a standard wiring variation seen with DB9 cables or if it is completely proprietary. I don't want to have to make these cables if I don't have to.

• Questions seeking recommendations for products get closed here. Can I suggest that you reword your question to ask for a solution to the problem rather than a recommendation for a product. – RoyC Oct 28 '18 at 8:33
• It's more about identifying this particular pinout than about where to buy it. – Dmitry Grigoryev Oct 30 '18 at 8:32

That is a standard null modem cable with handshake also known as crossover.

It is used to connect two DCE devices or two DTE devices together.

DCE (data circuit-terminating equipment) .... example: modem
DTE (data terminal equipment) .................... example: computer

TXD - transmit data