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. What Exactly is an Optical Module Housing? An optical module housing is the protective outer shell that encloses the internal components of an optical transceiver module. Think of it as the chassis or skeleton of the module. The housing structure comprises a housing and a heat dissipation component; the heat dissipation component comprises a heat dissipation bottom plate and a plurality of cooling fins provided on the.