ETRI is the largest government funded research institute in Korea, which strives to advance science by means of formulating innovative ideas; developing new techniques; and training professional individuals in the area of information telecommunications to ultimately enhance social and economical aspects of the modern society.

AT&T Inc. is an American multinational conglomerate holding company headquartered at Whitacre Tower in Downtown Dallas, Texas. It is the world's largest telecommunications company, the largest provider of mobile telephone services, and the largest provider of fixed telephone services in the United States through AT&T Communications. Since June 14, 2018, it is also the parent company of mass media conglomerate WarnerMedia, making it the world's largest media and entertainment company in terms of revenue. As of 2018, AT&T is ranked #9 on the Fortune 500 rankings of the largest United States corporations by total revenue.

Finisar Corp. operates as an optical communications company. The firm provides components and subsystems to networking equipment manufacturers, data center operators, telecom service providers, consumer electronics and automotive companies. Its products include optical transceivers, active optical cable, optical engines, communication components, sensing components, and optical instrumentation. The company was founded by Frank H. Levinson and Jerry S. Rawls in April 1987 and is headquartered in Sunnyvale, CA.

Google is a multinational technology company focusing on search engine technology, online advertising, cloud computing, computer software, quantum computing, e-commerce, artificial intelligence, and consumer electronics. Their products address a wide range of use cases, including email, navigation, cloud computing, web browsing, video sharing, productivity, operating systems, cloud storage, language translation, photo storage, video calling, smart home, smartphones, wearable technology, music streaming, and more.

Wuhan Telecommunication Devices Co. Ltd., part of Accelink Technologies Co., Ltd., is a company headquartered in Wuhan, China. The firm manufactures and distributes semiconductor devices. On December 24, 2012 Accelink Technologies Co., Ltd. acquired Wuhan Telecommunication Devices Co. Ltd. from Fiberhome Telecommunication Technologies Co., Ltd. for $62.86 million.

Shanghai Future Broadband Technology Co., Ltd., established on 2004-09-22, Business scope includes network,Computer hardware and software,communication,Optoelectronic devices,optoelectronic device,Technology development in the field of interactive media technology and application,technical consulting,technology transfer,Production of technical services and related products,Sales,system integration,Design of broadband network engineering and communication terminal products,Production,debugging,Install,Assembly and performance testing of purchased components,Engaged in the import and export of goods and technology,Telecommunications business.Fire Equipment Sales,Building intelligent construction engineering professional construction,Professional construction of fire protection facilities construction engineering,Internet of things technology,satellite navigation,technology development in the field of information technology,technology transfer,technical consulting,Technical Services. [Items subject to approval by law,Business activities can only be carried out after approval by relevant departments]

Manufactures telecommunications equipments and network solutions to service providers

Linktel Technologies Co., Ltd. engages in the research and development, production, and sale of optical communication transceiver modules. Its products are used for telecommunication transmission, wireless communication, fiber access, data center, and fiber channels. The company was founded on October 28, 2011 and is headquartered in Wuhan, China.

Corning Optical Cable Systems (Shanghai) Co., Ltd., established on 1994-12-31, The scope of business includes the production of quartz crystals,crystal oscillator;Various connectors of information network system,Connector;Communication Laser,Detectors and related raw and auxiliary materials for the above products,original device,Parts and Equipment,Companion parts and special tools(Such as gas stove combustion head, etc.).Wholesale of similar products of the above products,import and export,commission agent(except auction)and other related business,And provide related services and technical support,Sell ​​self-produced products.[Items subject to approval by law,Business activities can only be carried out after approval by relevant departments]

Hewlett Packard Enterprise Development LP operates as subsidiary company. The company is headquartered in La Jolla, CA.^\n^

Ciena is the network specialist. They collaborate with customers worldwide to unlock the strategic potential of their networks and fundamentally change the way they perform and compete. With focused innovation, Ciena brings together the reliability and capacity of optical networking with the flexibility and economics of Ethernet, unified by a software suite that delivers the industry's leading network automation. They routinely post recent news, financial results and other important announcements and information about Ciena on their website.

SK Telecom Co., Ltd. (Hangul: SK텔레콤 or 에스케이텔레콤) is a South Korean wireless telecommunications operator; it is part of the SK Group, one of the country's largest chaebols. SK Telecom is South Korea's largest wireless carrier: it leads the local market with 50.5 percent share as of 2008. Since its creation in 1984, the company has evolved from a first generation analog cellular system, to second generation CDMA, then to the world's first third-generation synchronized IMT-2000 cellular system. SK Telecom also became the world's first carrier to commercialize HSDPA in May 2006. SK expanded into the landline market by acquiring second-rated fixed-line operator Hanaro Telecom in February 2008.

Transmode is a provider of optical networking solutions for transport of data, voice and video traffic, based on CWDM and DWDM technology (Coarse/Dense Wavelength Division Multiplexing). Transmode's unique Intelligent WDM (iWDMâ„¢) approach has lead to widespread deployment of over 10000 systems in a customer base consisting of more than 250 fixed and mobile network operators, service providers, large enterprises and public institutions across Europe, the Americas and Asia.

FRTEK Co., Ltd. engages in the manufacture of communications equipment. Its products include light emitting diode (LED) lighting, mobile worldwide interoperability for microwave access (WiMAX) repeaters, wideband code division multiple access (WCDMA) repeaters, mobile television service gapfiller and enhanced message service (EMS) solutions. The company was founded on October 13, 2000 and is headquartered in Anyang-si, South Korea.

INKEL Corp. is engaged in the manufacture of audiovisual (A/V) and telecommunications equipment. It operates through the Audio business division and Information and Communication business division. The Audio business division offers A/V receiver, car entertainment, full high definition light emitting diode television and others. The Information and Communication business division provides wireless fidelity phone, set top box and others. The company was founded on March 25, 1978 and is headquartered in Incheon, South Korea.

Guangdong Ruigu Optical Network Communications Co. Ltd. is a private company headquartered in China focused on semiconductors and related devices.

Zhongxing Optoelectronics Technology Co., Ltd., established on 2016-10-10, Business scope includes optoelectronic components and devices,components,module,Research and development of equipment and related hardware and software,Production,Sales,technical consulting,Technical Services;Self-operated and agent import and export business of various commodities and technologies(Except for commodities and technologies that the state restricts the company to operate or prohibits the import and export of);investment management.(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments)

Fiberhome Telecommunication Technologies Co., Ltd. engages in the manufacture and sale of communication equipment and the provision of network solutions. Its products include communication system equipment, optical fibers, cables and data network products. The company was founded on December 25, 1999 and is headquartered in Wuhan, China.

Part of Source Photonics, Inc., Source Photonics Chengdu Co. is a Chinese company that manufactures and distributes telecommunication products.\nThe company says this about itself: Source Photonics is a leading provider of innovative and reliable optical communications technology that enables communications and connectivity in datacenters, metro, and access networks. We add value to our customers by developing next-generation solutions that enable their growth by meeting the rapidly increasing demands of cloud infrastructure, wireless communications, routing, and fiber-to-the-premises applications worldwide.