The left side of the diagram shows a device that applies an optical module, such as a switch. Receiving is the inverse process of. Polarity in fiber optic networks refers to the alignment of transmit (Tx) and receive (Rx) signals between interconnected devices. Receiving. I have an implementation coming up of dark fibre which requires me to run ZX SFP's (cable distance more than 10 k's), but I need to put an attenuator into the receiving side of the SFP at each end. The optical module is a very important component in an optical communication system.
