Abstract: A system includes a baseband component, an optical transceiver component, a first pluggable radio frequency component, and a wireless head-end component. The baseband component is configured to provide a radio frequency signal to the first pluggable radio frequency component through the optical transceiver component. The optical transceiver component is connected to the first pluggable radio frequency component through an optical fiber. The first pluggable radio frequency component is connected to the wireless head-end component in a plugging manner.

Abstract: An electrical connection socket includes an insulated substrate, and the insulated substrate has an upper surface, a lower surface, and a side surface. The insulated substrate includes at least one plug portion. At least two power terminals are disposed in the electric connection area. The signal connection area is provided with an electric signal slot, an opening of the electric signal slot is located on the side surface of the insulated substrate. Along a direction perpendicular to the lower surface, there is a height difference between the electrical signal slot and the connection section. The electrical connection socket can increase a distance between the power terminal and the electrical signal slot in the electrical connection socket, and increase a distance between the power terminal and a metal housing of a module in a matching direction when the electrical connection socket is matched with the module.