The following pictures are typical of PC based systems.
The cable provided will connect between these ports and
is referred to as a DB9 Female to DB25 Male, Null Modem Cable
(Unless you request no cable be sent)
This is the Serial Port on the PRINTER itself, if you are replacing a printer, and the port on the printer looks like this, it is a serial printer. Look at the next picture to help determine which cable you will need.
These are Serial Ports, located on the back of your computer. If you have one of these available, and your software supports a serial port, you may choose to use a Serial Interfaced receipt printer. Make a note on which type of port you have available. Your cable choice is only DB9. Call sales for DB25 or you can note it in the comments section during checkout.