Here s a closer look at how.
9 pin serial port.
First introduced in the 60s rs 232 is a protocol that defines how the data is transferred bit by bit from a data terminal equipment dte such as a computer terminal to data communication equipment dce such as a modem.
Some miniaturized electronics particularly graphing calculators and hand held amateur and two way radio equipment have serial ports using a phone connector.
This use has been standardized as tia 574.
This pinout can make a world of difference for successful rs232 serial communications.
Trendnet usb to serial 9 pin converter cable tu s9 connect a rs 232 serial device to a usb 2 0 port supports windows mac supports usb 1 1 usb 2 0 usb 3 0 25 inch cable length plug play.
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Thus it is important to understand how the 9 pin rs232 cable pinout can affect the flow of serial data between devices.
The background of the 9 pin serial port.