 360networks
 - Provider of fibre optic communications infrastructure and bandwidth services.- Allstream
- National broadband business services provider and local exchange carrier. Formerly AT&T Canada.
- AlphaNet Telecom Inc
- Global carrier of voice, data and fax traffic using frame-relay technology.
- AMI Telecommunications
- Offering international private lines to commercial retail and carrier customers.
- Angus TeleManagement Group
- Management consultants specializing in business telecommunications. Books, newsletters, seminars and conference on telecom in Canada.
- Bell Canada Enterprises (BCE)@
- Call-Net Enterprises Inc.@
- Canadian Call Center
- Canadian call centre organization TigerTel/UTR specializes in inbound and outbound call centre solutions and services for clients throughout North America.
- Enghouse Systems Limited
- Development and marketing of robust applications for the management of outside/inside plant systems for Telecommunication, CATV and power systems.
- Extend Communications Inc
- 1-800 inbound call centre, providing order taking, and many other direct marketing response services. Servicing Canada and the U.S.
- Hansen Software Development
- C.A.S.H. call accounting software.
- Jade
- Offers advanced simulation and modelling software used for planning, designing and managing the public telephone network.
- Maritime Telegraph and Telephone Co. Ltd. (MT&T)
- Telecommunications supplier to homes and businesses.
- MicroLegend Telecom Systems
- Provides SS7 monitoring and control systems for network mediation, fraud control, protocol conversion, and real-time network monitoring applications.
- Nortel Networks
- Supplies communications technology and infrastructure to service providers and enterprise customers.
- ObjectWorld Inc.
- Provides tools and consulting services in the telecommunications field. Our products include SS7 network analysis, computer telephony and video conferencing applications.
- Ontario Northland Transportation Commision (ONTC)
- Provides telecommunications and transportation services in northern Ontario. Services include the Polar Bear Express, Chi-Cheemaun, Manitoulin Island II, the Northlander, and O.N. Tel.
- Pro-Tech Communications Inc.
- Offers turnkey services to the cable TV and telecommunications industries, including initial surveying, engineering design, project management, installation, and site restoration.
- Pronexus, Inc.
- Computer telephony tools with the power of Visual Basic® to enable Windows®-based voice and fax processing.
- RadCom Technologies
- Refurbished telecommunication equipment.
- Rogers Communications
- Provides cellular and other wireless communications, cable television and other cable distribution services, publishing, and radio and television broadcasting.
- Shaw Communications
- Multi-system cable operator and communications company.
- Taske Technology
- Product information and support for ACD Toolbox & Voice Toolbox software used for Call Centre management.
- Telanet Canada Inc.
- Provides complete communication and telephony solutions to corporations and large businesses across Canada.
- TELUS Corporation@
- Total Telcom Ltd.
- Computers and telecommunications network contractors.
- Vancouver Telephone Company Ltd.
- An integrated provider of long distance, business phone lines, Internet access and web design.
- Videotron
- Provides Quebec and Ontario with cable television, interactive multimedia development, Internet access services, and residential telephone services .
- Western Telephone
- Customized business/institutional key telephone systems using analog/electromechanical technology. Engineering, design, technical support and parts are available.
- 1-800-We Answer
- Offers telecommunication solutions for New York and beyond, ranging from phone system installation and technical support to voicemail and cabling services.
- 8884Dialtone.com
- Affiliated with voice, data, and Internet services providers nationwide.
- ACS, Inc.
- Offers data and Internet services, business and residential phone service, and telecommunications consulting.
- ACSI Network Technologies
- Provides broadband telecommunications infrastructure solutions to communications carriers and corporate/government agencies.
- Ahmad Nassir AlBinali & Sons Company
- Contracting and trading firm specializing in civil, mechanical, and telecommunication construction.
- Alcatel
- Provider of communications products and services to carriers, service providers, and enterprises.
- AllCom
- Long distance, prepaid calling cards, international callback, toll fraud prevention, teleconferencing, paging, cellular, fax broadcast, etc.
- Allied Riser Communications
- Facilities-based provider of broadband data, video, and voice communications services to small and medium-sized businesses.
- Alltel
- Provides wireless, local telephone, long-distance, Internet, and high-speed data services to residential and business customers.
- Alpha Business Communications
- Offers local telecommunications, long distance, calling cards, teleconferencing, Internet access, and other communications services.
- Alpha Telecom Ltd
- Andrews Telecommunications Corporation
- Woman owned business, serving long distance customers with domestic, international voice and data communication services.
- Apex Telecommunications Training Solutions
- Provides voice, data, central office, and telecommunications training.
- Ascom
- Based in Switzerland, with offices worldwide. Ascom is an internation telecom solutions provider.
- AT&T
- AT&T provides local, long distance, and other communications services and products, as well as network equipment and computer systems to businesses, consumers, telecommunications service providers, and government agencies.
- AT&T Small Business Center
- Telecommunications and Internet services for small businesses.
- ATSI Communications
- Develops network solutions and provides telecommunication services in the United States and Latin America.
- Avaya
- Communications systems and software including voice, converged voice and data, customer relationship management, messaging, multi-service networking, and structured cabling products and services.
- Avaya Brazil
- Provider of unified communications technology for business. Avaya specializes in IP telephony and call centre solutions.
- Avaya Mexico
- Unified communications technology for business, from IP telephony to call centre solutions. Avaya business technology products can help solve the communications problems of any sized business.
- Bactel
- Offers turn-key systems for global telecommunications needs including fibre optics, data services, managed networks, and VPN.
- Bechtel Telecommunications
- Provides end-to-end telecom infrastructure services supporting global needs in all current and emerging communications technologies.
- Belfast Telecommunications
- Vendor of PC-based business telephone systems, computer telephony solutions, voice mail, and LAN wiring.
- BellSouth
- Provider of residential and business telecommunications services, including phone, paging, voice mail, DSL, dialup Internet, data, and web hosting.
- BellSouth International
- Provides or develops communications in Latin America, Europe, the Middle East, and Asia.
- BellSouth Small Business Solutions
- Including local telephone service, long distance, DSL and Internet, data, web hosting, wireless, and paging services, equipment, and advertising.
- Bezeq
- Israel telephone and telecommunications company.
- Bigfoot
- A communications company, Bigfoot provides a range of services including conference calling, SMS gateways, text messaging, email tools, and domain registration.
- Birch Telecom
- Provides DSL, T1, ISDN, dial-up Internet access, web hosting, local telephone service, long-distance, and phone system equipment for small to mid-size businesses.
- Brasil Telecom
- Holding company that controls nine fixed telephony service operators.
- British Telecom (BT)
- Provides telecommunication services, including long-distance and international calls. Also manages private networks and supplies mobile communication services.
- Brix Communications
- Provider of diversified telecommunications, Internet and video services to tenants of commercial and residential properties in the U.S.
- Broadline Communications
- Provider of broadband voice services.
- Broadwing
- Operates in three industry segments: communications operations, information systems, and teleservices.
- Brother: Telco Labeling Solutions
- Telecommunications labeling solutions from Brother make the most of your time and effort. Whether you are an independent contractor, corporate IT manager, or responsible for a national team of field technicians or installers.
- BTI
- Telecommunications services including long distance, data and wireless technologies.
- C3i
- Manufactures antennas and custom printed circuit board modules for the RF market. Yagi antennas cover frequencies: 50 MHz to 1296 MHz.
- Cable & Wireless
- Global supplier of Internet, data, and voice solutions to business customers.
- Cabletec
- Sell, install and service business phone systems; install voice, data and video cable; PC integration work.
- Callahan Associates International
- Develops and operates telecommunications companies.
- CANTV
- Compañia Anónima Nacional Teléfonos de Venezuela. Empresa de telefonía de Venezuela.
- Chequamegon Telephone
- Services include Internet access, telephone systems, security systems, personal paging, and cellular.
- China Telecom
- Operates domestic and international fixed line telecommunications networks and infrastructure.
- Christoph Emmerich GmbH
- ISDN, PC-Karten, Telefone (in German).
- CimTel Net
- Providing telecommunication, Internet and cable services in NE Oklahoma.
- Cintech Solutions
- Offers Internet technology solutions for mid-market systems.
- Cisco Voice and Unified Communications
- Cisco Unified Communications offers a system of voice, video, and IP communications products.
- CityNet Telecommunications
- Wiring city streets in metropolitan areas with high-speed, all-optical networks by using robotic installers that travel through the sewer system.
- CLS Group
- Manages national and international projects for the communications industry.
- Commonwealth Telephone Enterprises
- Diversified telecommunications corporation providing advanced solutions in delivering communications, information, and entertainment services to businesses and residential users.
- Commsworld
- Independent voice and data provider, offering telephone systems, networks, voice, call charges, IP, LAN, and WAN.
- Communications Resource Corporation
- Offers a range of products and services to meet the voice and data communications needs of businesses.
- CommWorld of Kern
- Specialists in business communications and phone services, while also providing networking, cabling, and other business services. CommWorld are licensed AT&T and Toshiba dealers.
- Connecticut Communications
- Offering business telephone/voice mail systems along with consulting and a nationwide installation program.
- Cooperative Communications
- Provider of cellular, long distance, toll-free, Internet access, high speed data transfer, and other services.
- Corvex, Inc.
- Offers voice and data products including wireless networking. Also includes switching systems, telephone equipment, and accessories.
- Crystal Communications, Inc.
- Provides equipment and consulting for maritime and land-based satellite communications. Products include Iridium, Inmarsat, MSAT, Globalstar, and Marine Satellite Television.
- Cypress Communications
- Provides a range of services to small and medium-sized businesses located in multi-tenant office buildings.
- Davis Company
- Dealer for telephone companies offering a variety of services.
- Deutsche Telekom
- Provides public fixed-network voice telephony, mobile communications, text and data services, corporate networks, and on-line services.
- Digital Exchange Solutions
- Supplier of telecommunication solutions including videoconferencing systems and voice mail systems to businesses throughout the U.K.
- Digital Voice Systems (DVS)
- East Florida Communications
- Full-service telecommunications company. Telephone equipment, long distance and local telephone service.
- Eatel
- Telecommunications services.
- EconoPhone
- Owns and operates a carrier-grade digital network throughout the United States and Europe.
- EDP Environments Inc.
- Specializing in the design, construction, and maintenance of telecommunication, co-location, and computer facilities.
- Eircom
- Telecommunications company providing a comprehensive range of voice,data, and Internet solutions including broadband, DSL, and ISDN in Ireland.
- Electronic Design Company
- Providing intercom and voice mail systems, media retrieval, CCTV, television distribution and networking products.
- eLink Communications
- Provider of broadband, networking, and application services to businesses in multi-tenanted office buildings.
- eMeritus Communications
- Provides a range of voice, data, and Internet communication services.
- EMS Technologies, Inc.
- Designs and manufactures advanced wireless, satellite, and defence solutions and technologies for broadband and mobile information users.
- Enkay Telecom India
- Manufacturing telecommunication equipment.
- Enkido
- Multimedia communications company building an end-to-end high capacity broadband fibre optic network.
- Entryphone Company Limited
- Manufacture and installation of audio and video door telephone systems.
- eSpoke.com
- Select and purchase telecom services online for businesses or homes, compare long distance plans, get valuable information regarding telecommunications needs and effective uses of technology.
- Etisalat
- Offering telecommunication services including telecom and data networking.
- European Competitive Telecommunications Association (ECTA)
- Portal featuring European telecoms and telecommunication industry news, training, and regulatory approval information.
- Eurotech Communication
- Eurotech Communication is a designer and manufacturer of telecommunication convergence products for corporate, military, cellular operators, termination, origination, and SOHO clients.
- Extenda Communications Corporation
- Full-service data and telecommunications partner providing consulting, equipment, installation, and service for data and voice services in businesses and homes.
- FCNP Services, Inc.
- Provides telecommunications training programs.
- Fibercorp
- Providing network build-out, regional broadband connectivity, and integration and maintenance of telecommunications infrastructures.
- Final Mile Communications
- Building, managing, and servicing data and voice networks.
- Fine Telecom, Inc.
- Provides specialized tariff auditing, local/long distance services, toll free 800/888 services and a distributor of collector phonecards.
- FLAG Telecom
- Offers a broad range of products and services to international carriers, service providers, and other telecommunications companies.
- FNet Corporation
- Telecom company operating its own private international network. Markets calling cards, IP telephony gateway and wholesale carrier services, and corporate Internet access.
- France Telecom
- Provides worldwide services for direct dial, leased lines, virtual private networks, Internet, and TV broadcast.
- France Telecom North America
- Fujitsu Network Communications (FNC)
- Develops and manufactures broadband transmission and switching technologies that deliver voice, video, and data services.
- Fujitsu Telecommunications Europe Limited
- Supplier of telecommunications products and services.
- Galaxy Communications, Inc.
- Engineer, furnish, and install telcommunications systems including switching, transmission, D/C power, infrastructure, and co-location.
- Gillette Global Network
- Offers integrated telephone services to small and mid-sized businesses.
- Global Crossing
- Independent provider of undersea fibre optic telecommunications systems.
- GlobeLynx
- Connects television broadcasters and contributors using fixed broadcast cameras and a virtual switching network. Also allows the booking of live news interviews.
- Greenwoods Communications
- Independent network solutions provider to the communications industry. Supplies a range of telecom infrastructure services for network operators and OEMs.
- Group IV Products
- Sales and marketing agency specializing in telecommunications and data communications products.
- Hector Communications Corp.
- Hop-on.com, Inc.
- Developing wireless, broadband, and virtual gaming technologies.
- HP Network and Service providers
- Overvew of Hewlett-Packard's products and services for the telecommunications, enterprise computing, and content and consumer access industries.
- Huntleigh Telecom, Inc.
- ILD Telecommunications
- Facilities-based provider of prepaid phone services and telecommunications outsourcing including operator-assisted and direct-dial long distance services, as well as wholesale billing services.
- Infinity Communications
- Markets long distance products and services, designs custom calling programs for large organizations, and outsources communication solutions.
- Infotel
- - offers full range of telecommunication services (in Russian).
- Intelcom San Marino Telecommunication
- International telecommunications company of San Marino. In English, Italian, and Portuguese.
- Invsat Limited
- Project manages and delivers radio and VSAT solutions, satellite/broadband networks, and VPNs within global maritime, oil and gas, government, and emergency services sectors.
- iQwired Telecommunications Services
- Provides telecommunications services for business including high speed Internet, bandwidth test, VoIP, local and long distance phone services, bill audits, and telecom consulting.
- ITC Holding Company
- JCI Communications, Inc.
- Full service data and telecommunications services, including equipment, cable and wiring, and consulting.
- JKC
- Supplies viewstation video and audio conferencing systems plus multimedia presentation equipment and web hosting for businesses.
- JMA Wired
- Develops and operates properties designed to house and host telecommunications and Internet companies.
- Kovacs
- Telecommunications design engineering, project management, installation, training and course development firm.
- KPN
- Core business areas include fixed telephony, mobile communications, data communication services and Internet, call centre and media services.
- Landssími Íslands - Iceland Telecom
- Lantana
- Telephone and data cable installation for business or home.
- LDCircuit.com
- Providing long distance leased line, point-to-point, voice and data circuits.
- LDMI Telecommunications
- LDMI Telecommunications offers voice, Internet and data, and network solutions.
- Luminet
- Nonprofit telecommunications company which is pioneering a community-wide data, voice and video network in the Winona area.
- Marathon On-Line Services
- Northwest based Telecommunications provider. Long Distance, 800, Cellular, Internet and Web Hosting Services.
- Matáv
- Hungarian telecommunications service provider.
- Maximum Network Solutions Ltd
- MCI
- Official site of MCI, a provider of residential voice, advanced messaging, and commercial phone and telecommunications services in the United States.
- MED-1 Submarine Cables
- Operates an undersea high-speed fibre optic cable network connecting Israel/Cyprus to Italy.
- Medcom Professional Services
- Alpha-num paging & message dispatch, 24-hour tele-messaging, call forwarding, call transfer, executive voice mail, and custom call directors.
- MiDAS Management Systems
- Specialises in call management and voice mail systems for businesses, hotels, and hospitals.
- Motorola
- Official site of Motorola, provider of mobility products and solutions across broadband and wireless networks. Products include cell phones and mobile devices, networking and broadband peripherals, and cellular network systems.
- Mpower Communications
- Provider of data, telephony, Internet access, and web hosting services.
- Multi Media Communications
- Provides one-way and two-way communications systems, both wired and wireless.
- National Rural Telecommunications Cooperative (NRTC)
- Providing c-band and DBS services, to rural America.
- NEAX 61
- Offers Internet and mobile communications infrastructure solutions.
- NEC Corporate Networks Group
- Netbricks
- Source-code and hardware implementations of data & telecommunication technologies to OEMs, including NGN (SIP, MGCP, Sigtran), ATM, AAL2, V5, GR303, and SS7.
- NetLojix Communications
- Provider of enterprise network technologies that integrate data, voice, and Internet communications services and IT support.
- Network Plus
- Providing business communications services including long distance and local telephone, Internet access, networking, and more.
- New Horizons Telecom
- Providing commercial and industrial electrical contracting, specializing in the design and construction of telecommunications facilities.
- Next Century Systems
- Offers auto dialers, predictive dialers, and telemarketing software.
- Nippon Telegraph and Telephone (NTT)
- Global group of regional, long-distance, mobile, and data communications service providers and other diversified businesses.
- Norlight Telecommunications, Inc
- Providing telecommunications services, wholesale fibre optic and digital microwave transmission, and satelite transmission.
- Norstan
- Full-range provider of integrated voice, data and video communication solutions.
- North Central Communications
- NCC offers comprehensive communications solutions for organizations of all sizes.
- NorthWestern Communications Solutions
- Offering voice, video, and data network solutions, including wireless communications for business and office.
- nTelos
- Digital wireless PCS provider in the mid-Atlantic region.
- NTT America
- Provides corporate customers with business communications services.
- NTT Communications
- OAO Rostelecom
- Nationwide operator of international and long-distance telecommunications.
- Observer Group
- Operates in the field of business and communication intelligence, with media and market monitoring, analysis and communication evaluation, and more.
- Oki Electric Industry Company
- Core businesses are telecommunication systems, information processing systems and electronic devices.
- Opal Telecommunications
- Offers discounted telephone service over the BT network.
- Opera Telecom
- International independent telecommunication company providing SMS premium services, number services, billing, IVR, co-location, and virtual Telco services.
- Optimum Telecom
- Offers discount DSL service providers, long distance services, cellular phone plans, and calling cards. Also features the BottomLine rate calculator to compare services.
- Pacific Wave Industries
- Develops new technologies to drive the telecommunications and photonic industries, including high speed electro-optical modulators, phased array antennas, and sensors.
- Palestine Telecomunications Company
- PangeaTech, Inc.
- Provides residential communities with telecommunication services including high-speed Internet access.
- Passport Telecom
- Provides international telephone service, discounted rates, callback services, and phone cards.
- penntele.com
- Supplying local and long distance service and business systems.
- Peregrine Communications
- Supplies headend, broadband and hybrid fibre coax systems and designs digital and analog network systems combining equipment from different manufacturers and services.
- Philcom Corporation
- A Philippines-based company. Includes voicemail, long distance telephone, and Internet service.
- Philippine Long Distance Telephone Company (PLDT)
- Official site of PLDT, the Philippine Long Distance Telephone Company. Features information on products and services as well as getting customer support.
- Phonecards Onsale
- Sells low rate prepaid calling cards.
- Pioneer Telephone
- Telephone cooperative offering long distance, Internet, DSL, paging, cellular, and security-alarm services.
- Point 2 Points Internet, Private Line & T1 Price Quotes
- Buy flat rate private lines and Internet access, including T1, DS1, T3, DS3, OC3, OC12, OC48, FE, and gigE. Instant price quotes available online.
- Portugal Telecom
- PowerDsine
- Offering power over LAN technology, which integrates data, voice, and power on standard ethernet infrastructure.
- Prairie Systems
- Worldwide provider of integrated voice, fax and data solutions.
- Primus Telecommunications
- Provides a range of voice, data, and Internet products and services including long distance, wireless, and VoIP solutions.
- QuesCom
- Manufacturer of IP telephony solutions for service providers and enterprises. Products include SmartIAD and NextBX, which provide value added voice services.
- RagingWire Telecommunications, Inc.
- Offers a variety of services including IT outsourcing, network management, and disaster recovery.
- RCN
- Provides fibre optic local and long distance phone, cable television, and Internet services. Includes information on RCN's Internet, cable TV, and phone services, company information, and My RCN.
- Residual800.com
- Offers toll-free voice, fax, and virtual office services to small businesses. Distributor opportunities available.
- RWE Telliance
- Telecommunications networks and services.
- Ryan Hankin Kent, Inc. (RHK)
- Market research and consulting firm specializing in the analysis of advanced technologies for the public telecommunications network.
- Sarco Communications Company
- Connecticut based communications company.
- Science Dynamics
- Designs and markets telecommunications systems for a variety of applications and telephony products for data transmission.
- Seren Innovations, Inc.
- Provides two-way communication services to connect people to the data they need when they need it.
- Shared Technologies Fairchild
- Telephone systems and services, PBX and voice mail sales and maintenance, local and long distance services.
- Shenandoah Telecommunications
- Holding company that provides telephone, cable television, communications equipment, and wireless services to customers in the Shenandoah Valley.
- SIGECOM
- Allows commercial and residential customers to have advanced telephone, video, and data services available to them through one fibre optics connection.
- SimpleLD
- Prepaid suite of services that does not require a contract. SimpleLD's services include low cost long distance, voice and web conferencing, Internet access, voice mail, and forwarding.
- Simplexity.com
- Internet-based neutral trading hub where buyers and sellers of telecommunications services can connect and transact.
- SITA
- Telecommunication and information processing solutions connecting customers in over 225 countries to a global data network.
- SmartStop, Inc.
- Provides a range of telecommunications solutions to the trucking industry.
- SMI International
- Provides facilities and systems management, communications, and IT products to government and commercial customers.
- Southeastern Telecom
- A provider of total communications solutions, from basic interconnect services to the design and implementation of global voice and data networks.
- Southern Cross Cable Network
- Collaborative transoceanic optical fibre project designed to remove the bandwidth bottleneck between Australasia and North America.
- Sprint Nextel
- Official site of Sprint Nextel, provider of high speed and wireless Internet and long distance and local telephone services. Learn about their cell phones, plans, and services.
- Starcom Hellas
- Offering telephony, fax, Internet, and vpn services.
- SU-KAM Groups of Companies (CVR)
- Makers and suppliers of inverters, expanded into other technology driven products including UPS, batteries, chargers, solar products, and stackable trolleys.
- Suntel
- Private telecommunications operator.
- SureCom Corporation
- Specializing in telephone systems, computer networking, cabling, Internet access, and voice mail services.
- SureWest Communications
- Provider of local phone, high-speed DSL, wireless PCS, and broadband services.
- Swaziland Posts and Telecommunications Corporation
- Majority owned by the Swazi government. Responsible to the Minister for Tourism and Communications.
- SWIFT
- Industry owned co-operative supplying secure messaging services and interface software to thousands of financial institutions all over the world.
- Swisscom
- Provider of a range of telecommunications products and services, including mobile and fixed network voice, data, and Internet services.
- TAF Telematica
- TDC
- Provider of local and long distance phone, Internet, cable TV, mobile, data, and related telecommunications services.
- Telco-Partners
- TelcoRock
- Telecom news, information, and online auctions.
- Tele-Presence
- Offers local, long-distance, data, Internet access, Intranet software, hardware, and wholesale carrier services from national providers.
- Tele2
- Provides fixed telephony, cellular, Internet, and data communications services.
- Telebrás
- Supplies public telecommunications services in Brazil. Site in Portuguese.
- TeleBright Corporation
- Offers comparisons between long distance, wireless, DSL, web hosting, and other services.
- Telecom Distribution Services Corp.
- Offers a range of telephone, computer, and other data networking services including equipment relocation, installation, and maintenance.
- Telecom Solutions
- Services incluce telex, colocation, Internet access, long haul, fax, and EDI.
- Telecommunications Research Associates (TRA)
- Learn about current and emerging telecommunications technologies in our high-quality, instructor-led courses, and find out about our other products and services.
- Telecommunications Services of Trinidad and Tobago
- Offering Internet access services.
- Telefonica CTC Chile
- Provides telecommunication and other services. Site in Spanish.
- Telefonos de Mexico
- Telefonverk Føroya Løgtings
- Faroese Telecom.
- Teleglobe
- Provider of international voice, wireless roaming, and data/IP services.
- Telemar
- Provider of local and long distance phone and data transmission services.
- Telepac, Serviços de Telecomunicações, SA
- Telecomunications services operator, offering services in the field of data communication.
- Telephone Support Systems
- Provides high-end services including voice processing, video conferencing, and wireless systems.
- Telesolutions
- Brokerage offering local/long distance, calling cards, 800, international, and cellular communications.
- Telesys Communications
- Offers international long distance rates, ordering information, and rate sheets.
- Telex-Chile
- A diversified telecommunications holding company principally engaged through subsidiaries in providing long distance services within Chile as well as in other selected Latin American countries and the U.S.
- TeliaSonera
- Provides telecommunications services.
- Telica
- Provides softswitch-based voice and data infrastructure products for telecommunications networks.
- Teligent
- Offers high-speed voice, data, and video telecommunications via digital microwave.
- Telkom
- Provider of local and long distance telephone service.
- Telkom SA
- Providing telecommunications for the country of South Africa.
- Telscape Communications, Inc
- Providing a full range of telephone services and products to speakers of Spanish living in the United States.
- TelstraClear
- Selling telecommunications services from tolls to business products.
- TerraBreeze Communications & Security Systems
- Offers customized voice, data, and security systems, products, and services to meet the needs of business and residential customers.
- TierOne Telecommunications Management Group
- Provides long distance telephone service, conference calling, broadcast fax, high speed Internet, and small business telephone systems.
- Torch Telecom
- Total Technologies
- Tracking Communications Inc.
- Travis Voice & Data
- Provide communications solutions to public and commercial entities, including call centre applications, digital recording, business telephone services, and digital dictation systems.
- Tri-Tec Communications, Inc.
- UbiNetics
- Developers of mobile solutions and products for consumer, commercial, and corporate users.
- UniDial Communications Inc.
- Provides telecommunications services, including long-distance, pagers, conference calling, callings cards, complete network services and more.
- Universal Telecom
- Offers fixed telephony, cellular, and internet services to residential customers and companies in Europe.
- Uralsviazinform Telecommunication Company
- Servicing the Perm region in the Western Urals area.
- Urmet
- Involved in public telephony, radiotelephony, centralized systems for voice and data, and more.
- Ursa Major International Ltd
- A leading provider of value-added services based on international standards with its main emphasis on X.400 communication.
- USA Digital
- Offers business Internet and long distance services including DSL, toll free, international, and domestic plans.
- USOL Holdings
- Provides integrated telecommunications and entertainment services to residents of multi-family apartment and condominium complexes.
- USTeleCenters Web
- Telecommunications solutions and account management from NYNEX, Bell Atlantic, GTE, Southwestern Bell, Sprint, Nortel, Tone Commander and Ascend.
- Utmost
- A communications service company.
- Vanco
- Provides end-to-end global network solutions for critical corporate networks, enabling electronic communication across wide geographical areas, headquartered in Isleworth.
- Verizon
- Verizon provides broadband DSL and Internet service, mobile phones and calling plans, home phones and long distance service, yellow pages and phone directories, and other wired and wireless communication products.
- VersaTel Telecom
- Dutch telecom company with local access fibre optic cable across Europe and international connectivity.
- WarpSpeed Communications
- Offers business customers a private, secure, IP-based broadband connectivity solution over a wide area network.
- Warwick Valley Telephone Company
- Dealing in leased telephones, custom calling features, caller ID, fax services, Centrex, PBX and key systems, maintenance service and more.
- Westcape Communications
- Electronic, software, and hardware design experts specializing in the telecommunications sector.
- WhoWhere?ConnectNow!
- Online service providing directory assistance.
- WideOpenWest
- Offers a variety of communication services to residential customers including high-speed Internet, digital cable TV, and telephone.
- Widermind
- Offer technical training in mobile telecommunications.
- Wood County Telephone Company
- Telephone and Internet service provider serving central Wisconsin.
- Working Assets
- Long distance, wireless, and credit card company that is helping people make a difference in the world through philanthropy and political activism.
- WorldCom
- Global communications company offering Internet, voice, and data services for business.
- Zhone Technologies
- Developing a line of telecommunications infrastructure products for the local access network.
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