An optical module usually consists of an optical transmitting device (TOSA, including a laser), an optical receiving device (ROSA, including a photodetector), functional circuits,main control circuit board (PCBA), housing and optical (electrical) interface and other. An optical module usually consists of an optical transmitting device (TOSA, including a laser), an optical receiving device (ROSA, including a photodetector), functional circuits,main control circuit board (PCBA), housing and optical (electrical) interface and other. Plug & Play™ Integrated Trunk Modules (ITMs) combine the features of the Plug & Play modules and a 12-fiber trunk provide the interface between the MTP® Connectors on the trunk and the LC or SC duplex jumpers that will then connect directly into the electronics. The LC duplex adapters feature. That is, metal medium communication represented by coaxial cables and network cables is gradually being replaced by optical fiber media. Optical modules are a core component of optical fiber communication systems. This solution optimizes space and simplifies installation, making it ideal for data centers, enterprise networks, and telecommunication. An optical module is a typically hot-pluggable optical transceiver used in high-bandwidth data communications applications.