The appropriate product category
- A unit that combines multiple elements (devices) to provide a function. For example, an Optical Transmission Module contains a transmission circuit and an LED, and it functions to convert electrical signals to optical signals. An Optical Reception Module contains a receiving circuit and a PD, and it functions to convert optical signals to electrical signals. An Optical Transmission and Reception Module contains a sending circuit, receiving circuit, LED, and PD all in one case.