Alcatel-Lucent provides solutions that enable service providers, enterprises and governments worldwide, to deliver voice, data and video communication services to end-users. As a leader in fixed, mobile and converged broadband access, carrier and enterprise IP technologies, applications, and services, Alcatel-Lucent offers the end-to-end solutions that enable compelling communications services for people at home, at work and on the move.

Azzurri is a leading managed services company delivering flexible voice, data and mobile communications.

Azzurri is one of the largest independent network management and support teams providing converged solutions that are no longer tied to technology and supplier.

Belgacom is the leading telecommunications company in Belgium and a market leader in a number of areas, including retail and wholesale fixed-line telephony services, mobile communications services and broadband data and Internet services.

BT Group is one of Europe's leading providers of telecommunications services. Its principal activities include local, national and international telecommunications services, higher-value broadband and internet products and services, and IT solutions. In the UK, BT serves over 20 million business and residential customers with more than 29 million exchange lines, as well as providing network services to other licensed operators.

China Telecom Corporation Limited is the world’s largest wireline telecommunications and broadband services provider. It provides telecommunications and information services including voice, data, image and multimedia in 21 provinces, municipalities, and autonomous regions in China. China Telecom Corporation Limited has about 220 million fixed line subscribers and over 35 million broadband subscribers.

With roughly 3.6 million telephone lines in operation, ČESK TELECOM, a. s., is the leading telecommunications company in the Czech Republic. Through its subsidiary company Eurotel Praha, spol. s r.o., it also has a significant presence in the Czech mobile services market.

Deutsche Telekom is one of the world's leading telecommunications companies. Deutsche Telekom offers millions of private and corporate customers all over the world the entire spectrum of modern information technology and telecommunications services - from wireless communications, Internet and fixed-network to complex IT and telecommunications solutions.

NTT Communications provides high-quality, technologically advanced network management, security and solution services to consumers, corporations and governments globally.

Siminn provides telecommunication, mobile and Internet services to private and corporate clients in Iceland. Its range of services and solutions includes fixed and mobile subscriptions as well as live TV, broadband/DSL and centrex network solutions.

TeliaSonera provides telecommunication services in the Nordic and Baltic countries, in Spain and the emerging markets of Eurasia, including Russia and Turkey.

TeliaSonera provides high quality telecommunications services, including packaging and carrying content like sound, images, data, information, transactions and entertainment.

Telstra is Australia's leading telecommunications and information services company, with one of the best known brands in the country. Telstra offer a full range of services and compete in all telecommunications markets throughout Australia, providing more than 9.6 million Australian fixed line and 9.4 million mobile services, including 4.4 million 3G services.

Tiscali S.p.A. (Borsa Italiana, Milan: TIS) is one of the leading alternative telecommunications operators in Europe. With one of the broadest and most interconnected IP technology-based networks worldwide, Tiscali supplies a wide range of services to its customers, both private individuals and companies, namely: Internet access through dial-up and ADSL as well as voice, VoIP, media, added-value services and other technologically advanced products. As at 30 June 2008, Tiscali had a total of 3.2 million active users in Italy and the UK. Of these, over 2.4 million were ADSL subscribers.