Is the network cable the same as the serial cable? I believe many people will have this question. The network cable is a data transmission line composed of multiple pairs of wires, such as a common telephone line, which is mainly used in switches, and UPlink ports are connected to switches or hubs. It is connected with a crystal connector, and the serial line is an expansion interface that uses serial communication, usually refers to the COM interface, and the more commonly used 9-pin serial ports, referred to as DB9 and 25-pin serial ports, referred to as DB25
Serial cables are also divided into straight-through and cross-over. The straight-through is generally used to extend or connect the PC and the device. The PC is generally a male connector, and the device is generally a female connector. The needle-shaped connector is a male connector and a hole-shaped connector. It is a female connector, so it can be used in general. It is used for PC and PC docking. The two ends are mostly female. The difference between them is that the pins at both ends are connected in different ways. The straight-through serial cable connects the x pin to the x pin, such as The first pin of the other end connected by a pin is a twisted wire, which twists the transmission line and the receiving line. For example, the fourth pin on one end is connected to the fifth pin on the other end.
The serial cable is divided into these two types because there are two different serial devices, one is data terminal equipment (DTE) and the other is data communication equipment (DCE), which receive information on different lines. Therefore, when choosing Should be selected according to the actual situation of the connection between the two devices
Those in the electronics industry should know that RS232 and RS232 serial cables are widely used. They are used for serial communication between devices, but the connection method depends on the situation. RS232 is a DB9 pin. Here is a brief introduction to his Pin definition, the big side is facing upwards, a row of 5 pins (upward): the male header is 12345 from left to right, and the female header is 12345 from right 2 to left. A row of 4 needles (downward): the male head is 6789 from left to right, and the female head is 6789 from right to left.
