- British Telecommunication plc - National telecommunications provider. Details on products and services, plus user area.
- Sprint - Global provider of voice, data and Internet services.
- Qwest Communications - Local Exchange Carrier (LEC), large wholesale and retail provider of voice and data services.
- AT&T - Provides long-distance, international and wireless services as well as internet access.
- Verizon Corporation - Local Exchange Carrier (LEC). Offers long distance, data, and Internet services as well.
- Cable and Wireless - Global supplier of internet, data and voice solutions to business customers. Products, services, awards, and network details provided.
- MCI - Global business and residential communications company operating in more than 65 countries.
- Telenor International - Norway based communications, IT and media company.
- Telstra Australia - Mobile phone, internet, and wired telephone service provider to Australia, covering 94% of the population.
- Telecom New Zealand International - Global provider of voice, data and IP solutions based in New Zealand.
- Bell Canada - Information on products and services, promotional events, regulatory issues and leading-edge innovations.
- Bell Telecommunication Philippines, Inc. - Digital broadband network access provider using wireless access for last mile connectivity and fiber optic cables in the Central Business District for domestic, multinational and entrepreneurial companies operating in the Philippines.
- Covista Communications - Facilities-based network, owns many brands, including Capsule Communications.
- CompleTel - Providing services in France, Germany and in the UK.
- Telefonica - Spanish multi-national company operating throughout the Spanish and Portuguese-speaking world.
- Interoute - European carrier with offices in various countries.
- Isis Telecommunications Management Ltd - Independent provider of mobile and fixed services to UK businesses.
- NEDATel Global Inc. - Provides carrier support services of used and new satellite, VSAT, VoIP networking equipment in over 46 countries and spanning all continents. Third-party equipment supply and installation services for overseas service providers.
- Voice.Sky Communications - Provides various VoIP services for carriers and resellers.
- France Telecom - French voice, data, and Internet company. In English and French.
- Telus - Canadian operator principally in British Columbia and Alberta.
- Deutsche Telekom - Telecommunications conglomerate that owns or operates T-Mobile, max.mobile and One2One mobile systems in Europe.
- FairPoint Carrier Services - Provides services for vendors in the industry.
- SBC Communications - Local Exchange Carrier (LEC) providing local to global voice, data, and Internet.
- Bell Canada International, Inc. - Develops and operates telecommunications services including basic telephony, cellular services and cable television services, with a primary focus in latin america and the Asia-Pacific region. (Nasdaq: BCICF).
- Carrier 1 International S.A. - Holding company with subsidiaries which provide long distance voice and internet protocol services on a wholesale basis. (Nasdaq: CONE).
- Jazztel p.l.c. - Holding company with subsidiary which provides telecommunications and data services. (Nasdaq: JAZZ).
- Shields Environmental - Environmentally conscious equipment resource for telecom carriers. Offices in Europe, North America, and Asia. ISO 14001/EMAS.
- Detecon Al Saudia Co. Ltd. - Deutsche Telekom Group investment in Saudi telecommunications. VSAT Service Provider.
- Aliant Inc. - Provides local and long distance telephone, wireless, and Internet services in Canada's four Atlantic provinces.
- ALLTEL Corporation - Offer local telephone, wireless, long distance, Internet and paging service.
- ATX Communications - Pennsylvania facilities-based provider offering voice, data, and wireless solutions. News, solutions, and careers included.
- BellSouth - Local Exchange Carrier (LEC) with local to global offerings in voice, data and Internet.
- West Bengal Telecom - Serves the Indian states of West Bengal (excluding the area served by Calcutta Telephones) and Sikkim.
- AT&T Canada, Inc. - Provides voice, data, and Internet telecommunications. (Nasdaq: ATTC)
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