One of the most important technological developments during the 1980s has been the emergence of optic fiber communication as a major international industry. Optic fiber is now the preferred transmission medium for long-haul trunks.

• 80年代最主要的技术发展之一是光纤通信已成为主要的国际性产业。光纤已是长途干线的首选传输媒质。