re how is a loopback connector made uwovax uwo ca writes i need to know the pins to connect to make a loopback connector for a serial port so i can build one the loopback connector is used to test the serial port thanks for any help from a recent byte magazine i got the following question and part of the answer deleted if you are handy with a soldering iron the loopback plugs are easy to make on a serial rs nine pin port use a female db connector and connect pins to to to and to to for serial rs pin ports you ll need a female db connector with pins to to to to to to to to to and to connected to test a centronics pin parallel port you ll need to connect pins to to to to and to in a male db connector stan wszola i haven t tried it use at own risk kkc etobkkc hisoy etn ericsson se
