The shielding plate is a hollow body in the form of a casing and has contact springs which are formed on the hollow body in order to make contact between the hollow body and a metallic structure. a transceiver of that typeis illustrated in FIG. the transceiver 1is disposed in a rectangular housing. Proper shielding Why is shielding necessary? Shielding protects your systems against electromagnetic interference and other sources of interference while also protecting the environment against emitted interference. This results in interference-free signal transmission and signal processing, and. Without effective EMI shielding, these systems can experience signal leakage, crosstalk, or compliance failures. When sourcing EMI shielding parts for optical. Optical module housing, also known as transceiver housing or optic module enclosure, is a protective casing designed to hold and protect optical modules used in various communication and networking applications.