RS232 serial cables are a type of communication cable used for data transmission. Since they are often used to connect computers and external devices, they are also called computer serial cables.
Straight-through and crossover refer to the different arrangements of the two interfaces connected in the serial cable.
- The pin arrangement of the two interfaces of a straight-through serial cable (also known as a 1-to-1 serial cable) is the same, that is, pin 1 is connected to pin 1, pin 2 is connected to pin 2, and so on. Straight-through serial cables are often used to connect two devices of the same type, such as connecting two computers or two external devices.
- The pin arrangement of the two interfaces of a crossover serial cable (also known as a 1-to-2 serial cable) is different, that is, pin 1 is connected to pin 2, pin 2 is connected to pin 1, pin 3 is connected to pin 6, pin 6 is connected to pin 3, and so on. Crossover serial cables are often used to connect two different types of devices, such as connecting a computer and a modem, a computer and a router, etc.
In summary, straight-through serial cables are suitable for connecting devices of the same type, while crossover serial cables are suitable for connecting devices of different types.
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