This is because these protocols depend on the equipment used for communication and varies according to the software used. However, this standard is limited to the physical level and does not signify the transport protocols to be used for transmission of data. The RS 232 standard of these ports defines different aspects of the signals transmitted across such as: The RS 232 standard followed by this port is suitable for transmitting data from Data Communications Equipment or DCE and Data Terminal Equipment or DTE. Looking at the technical aspects of serial ports, these are typically male ports as opposed to the parallel ports that are usually female ports and are normally found at the back of the computer being a part of the motherboard. However, these ports are much slower in comparison to the parallel ports. In many computers these ports are labeled as 10101 ports which represent binary.Ī USB to Serial converter can be used to connect with these ports and other devices easily and quickly that you may want to use with a modern computer. Understanding Serial PortĪ serial port, also known as a communication port or COM port, is one of the oldest kinds of ports that transmits and receives data bit by bit and is typically used to connect printers and peripheral modems to a computer system. The voltage sent by the pins of the connectors of these ports is either in ON or OFF state where ON has a binary value of 1 and OFF has a binary value of 0 while sending signals at -3 and -25 volts and +3 and +25 volts respectively.There are different types of serial ports available such as CAN, LIN, SMBus and others but the most commonly used type of interfaces are RS 232, RS 485 and RS 422 that come with different specifications and are more reliable. However, this makes these smaller and relatively cheaper ports quite slower. It transmits 8 bits of data at a time and therefore needs only one wire for it as opposed to 8 wires in a parallel port.
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