Cisco optical module picture Cisco optical module is a foreign brand optical module, which originated in the United States. The English name of Cisco Optical Module is Cisco Optical Module; Cisco Systems is a leading provider of Internet solutions, and its equipment and software products are mainly used to connect computer network systems. Cisco means Canadian snow fish. But Cisco is not derived from this, but the last five letters of SanFrancisco. It is said that a customer accidentally tore up the paper with the first seven letters of San Francisco printed on it when applying for the establishment of a company, and it was impossible to become Cisco later.