The rapidly growing data bandwidth from consumer broadband, mobile data and highly connected businesses is driving demand for 100Gbit/s (100G) network connections. Service providers are installing 100G connections in data centre, enterprise, metro and long-haul networks. Many systems have four or more 100G interfaces per line card and use switch chipsets that support up to 32 100G interfaces per device. The survey covered in this report indicates that more than 60 percent of companies that make telecom or networking equipment are shipping systems with 100G interfaces. This report analyses the current and projected use of 100G optical modules and PHY semiconductor components by equipment vendors, based on the results of an exclusive worldwide survey of engineers, designers, product managers and sales/marketing personnel that work for telecom and networking system equipment manufacturers and suppliers.