D-sub

A communication interface is an interface used for data transfer and communication between devices. Common communication interfaces include USB interface, HDMI interface, VGA interface, Ethernet interface, wireless network interface, etc. These interfaces can be used to connect computers, external devices, network devices, monitors, printers, etc. to realize data transmission and communication functions. 

The D-subminiature connector, also known as D-sub, is a connector named for its metal housing shaped like the letter D. The connector is used in a wide range of applications, from small consumer products to satellite equipment. This ubiquitous connector is used in a wide range of applications from small consumer products to large satellite equipment.

D-sub connectors

D-sub connectors consist of two or more parallel rows of terminals surrounded by a highly characteristic D-shaped metal shell. This metal shell not only provides mechanical structural support, but also functions as a shield against electromagnetic interference. There are several ways