Telia Company AB (formerly TeliaSonera) is a Swedish dominant telephone company and mobile network operator present in Sweden, Finland, Norway, Denmark, Lithuania, Latvia and Estonia. The company has operations in other countries in Northern and Eastern Europe, and in Central Asia and South Asia, with a total of 182.1 million mobile customers (Q1, 2013). It is headquartered in Stockholm and its stock is traded on the Stockholm Stock Exchange and on the Helsinki Stock Exchange.

The Board of Trustees of the University of Illinois, part of University of Illinois, is a company headquartered in Urbana, IL, that trusts Except Educational Religious.

Telefonaktiebolaget LM Ericsson engages in the provision of telecommunications equipment and related services to mobile and fixed network operators. It operates through the following segments: Networks, Digital Services, Managed Services, and Emerging Business and Other. The Networks segment supports all radio-access technologies and offers hardware, software and related services for both radio access and transport. The Digital Services segment provides software and services in the areas of digital business support systems, operational support systems, cloud communication, cloud core, and cloud infrastructure. The Managed Services segment includes networks and information technology managed services, network design and optimization, and application development and maintenance. The Emerging Business and Other segment encompasses emerging business, Iconectiv, Red Bee Media, and Media Solutions. The company was founded by Lars Magnus Ericsson in 1876 and is headquartered in Kista, Sweden.

Matsushita Electronics Corp. develops and manufactures electronic products. Its products include plasma TVs, DVD players, and digital cameras. It is a subsidiary of Matsushita Electric Industrial Co. Ltd. The company is headquartered in Osaka, Japan.

Alcatel-Lucent SAS engages in the provision of communications solutions to telecommunications companies, Internet service and data providers. It develops and integrates technologies, applications and services to offer global communications services. The company was founded in 1976 and is headquartered in Boulogne-Billancourt, France.

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.

Alcatel-Lucent Shanghai Bell Co., Ltd. engages in the provision of information and communication network solutions. Its business activities include optical network, internet protocol network, fixed network, and next generation 5G network services. The company was founded on December 15, 1983 and is headquartered in Shanghai, China.

Evolium SAS provides engineering and technical studies services. The company is headquartered in Nozay, France.

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.

Huawei Technologies is a telecom solutions company that offers infrastructure application software and devices with wireline, wireless, and IP technologies. The company’s products and solutions have been deployed in over 100 countries and have served 45 of the world's top 50 telecom operators as well as one third of the world's population. Huawei Technologies has 3 divisions in the United States: enterprise (IP networking and routers, wireless, storage, data center security), carrier, and consumer devices (smartphones and tablets). Founded in January 1987, Huawei Technologies is headquartered in Shenzhen, Guangdong. Its testing lab is based in Plano, Texas with an additional office in Santa Clara, California.

Siemens AG is a technology company, which engages in the areas of automation and digitalization in the process and manufacturing industries, infrastructure for buildings and energy systems, mobility solutions for rail transport, and medical technology and digital healthcare services. It operates through the following segments: Digital Industries, Smart Infrastructure, Mobility, Siemens Healthineers, and Siemens Financial Services. The Digital Industries segment offers a product portfolio and system solutions for automation used in discrete and process industries. The Smart Infrastructure segment includes products, systems, solutions, services and software to support a transition from fossil to renewable energy sources. The Mobility segment combines all Siemens businesses in the area of passenger and freight transportation. The Siemens Healthineers segment develops, manufactures, and sells diagnostic and therapeutic products, and services to healthcare providers. The Siemens Financial Services segment focuses on financing solutions for Siemens’ customers as well as other companies in the form of debt and equity investments. The company was founded by Johann Georg Halske and Werner von Siemens on October 12, 1847 and is headquartered in Munich, Germany.

International Business Machines Corp. is an information technology company, which engages in the provision of integrated solutions that leverage information technology and knowledge of business processes. It operates through the following segments: Software, Consulting, Infrastructure, Financing, and Other. The Software segment combines hybrid cloud platform and software solutions to help clients become more data-driven, and to automate, secure, and modernize their environments. The Consulting segment focuses on integrating skills on strategy, experience, technology and operations by domain and industry. The Infrastructure segment offers solutions for hybrid cloud, and is the foundation of the hybrid cloud stack. Infrastructure is optimized for infusing AI into mission-critical transactions and tightly integrated with IBM Software including Red Hat for accelerated hybrid cloud benefits. The Financing segment refers to the client and commercial financing, facilitating IBM clients’ acquisition of IT systems, software, and services. The company was founded by Charles Ranlett Flint and Thomas J. Watson Sr. on June 16, 1911 and is headquartered in Armonk, NY.

Zhongyi Technology Co., Ltd., established on 2013-06-13, Business scope includes software development,Computer accessories,Automated office equipment,Research and development of automatic control equipment,Production,Sales,Installation and Maintenance;communication base station,Communications room,communication tower,communication device,Communication-related construction and leasing of communication lines, etc.;Engaged in the general contracting of communication engineering construction with qualifications;Steel structure engineering;Telecommunications engineering professional contracting;Electronic and intelligent engineering professional contracting;General contracting of electric power engineering construction;Power facility installation,undertook,Take the test;Construction general contracting;Professional contracting of building decoration and decoration engineering;Municipal Engineering;Mechanical and electrical engineering construction general contracting;Professional contracting of waterproof, anti-corrosion and thermal insulation engineering;communication,iron tower,Engineering service and maintenance of computer room and communication related equipment;Construction labor construction;Employment introduction and labor dispatch;iron tower,security door,Anti-theft net,Magnetic door system,Sales of air conditioners and related equipment engineering services and maintenance;Piping Engineering Design,Construction and Maintenance;pipeline lease,Sales;Information system integration service and network engineering;Integrated wiring engineering design and construction;Weak current project(Including integrated wiring)design,Engineering installation and construction,Serve;Communication Engineering and Electronic and Intelligent Engineering,Intelligent Building System Survey,design,consult;Design of Security Technology Defense System,construction,repair;Computer hardware and software and peripheral equipment,Realtor;Engineering services and maintenance of communications and communications-related equipment;Computer room system service;Computer System Integration Engineering;Manufacture and installation of door head and electronic screen;Electronic signal light,Electronic equipment for road traffic,electronic display,LEDScreen,TV Wall,carLEDscreen design,make,Sales,Installation and service;communication device,Mobile phones and supporting products,Sales of Office Supplies;Communication business network system integration;Telecommunications support network system integration;Telecom basic network system integration;Telecommunications Network Maintenance;Professional communication pipeline design,the construction,Operation and maintenance;Telephone switching network construction and maintenance;Security System Engineering;Security(With monitoring)System and equipment,Building intercom system and equipment,Residential intelligent management system and equipment,Software and hardware research and development of road parking lot charging system and equipment,Production,Sales,design,Installation and after-sales service;Smart City and Smart Transportation(Including expressway)Supporting electronic product sales,engineering design,Engineering installation,maintain;Internet of things hardware and software and supporting product design,research and development,Production,Sales,Installation and after-sales service;Big Data Technology and Application;Road lighting engineering construction;electrical equipment,Telecommunications equipment,communication equipment,Production and sales of hardware equipment.(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments) (Items subject to approval by law,Business activities can only be carried out after approval by relevant departments).

Avaya is a global leader in communication systems, applications, and services. Learn about where they've been, where they're headed, and the leaders that are getting them there. The company's communication equipment and software integrate voice and data services for customers including large corporations, government agencies, and small businesses. Its office phone systems incorporate Internet protocol (IP) and Session Initiation protocol (SIP) telephony, messaging, Web access, and interactive voice response. Avaya also offers a wide array of consulting, integration, and other managed IT services. The company sells directly and through distributors, resellers, systems integrators, and telecommunications service providers; more than three-quarters of its sales are made indirectly. Parent company Avaya Holdings filed for an IPO in 2011.

Vodafone España SA provides telecommunications. It offers mobile phone, internet, and television services. The company was founded on May 27, 1994 and is headquartered in Madrid, Spain.

Inspur Electronic Information Industry Co., Ltd. engages in the provision of cloud computing infrastructure platform. It offers rack, blade and tower servers, storage systems, cloud data center operating systems, tax cloud terminals, set top boxes, rugged computers, and financial terminals. Its products are used for electronic government, education and taxation, and media cloud solutions. The company was founded on October 28, 1998 and is headquartered in Jinan, China.