The difference between optical transceiver and switch

The optical transceiver is a device that converts a signal transmitted through an optical fiber into an electrical signal and converts the electrical signal into an optical signal; a fiber switch is a device that transmits signals between a plurality of optical transmission devices; a common switch device performs storage-and-forward exchange of electrical signals.

principle: 

The optical transceiver is the terminal device for optical signal transmission. The optical transmission system consists of three parts: a light source (optical transmitter), a transmission medium, and a detector (optical receiver). Divided by transmission signal, it can be divided into digital transmission system and analog transmission system.

A switch means that a switch is a network device used for electrical (optical) signal forwarding. It provides an exclusive electrical signal path for any two network nodes that access the switch. The most common switch is an Ethernet switch. Other common are telephone voice switches, fiber switches and so on.