- Paltalk
 - Chat with users in live voice and video chat rooms for free. - Net2Phone
- Offers services that allow people to make phone calls from a computer to a telephone or another PC for free or reduced rates, create and send voice e-mails, and call web sites.
- VocalTec Communications
- Telecom equipment provider offering packet voice products and services for carriers and service providers.
- JAJAH
- Web-activated telephony service through which users can use the Internet to make low-cost calls with their phones.
- pulver.com
- Provides community for the Internet telephony industry through conferences, newsletters, mailing lists, analysis, liaison roles, and more.
- 8x8
- Offers the Packet8 broadband telephone service, consumer videophones, hosted iPBX solutions, and voice and video semiconductors and related software.
- Verso Technologies
- Provides Voice over Internet Protocol (VoIP) technology to deliver integrated switching solutions for service providers.
- Innomedia, Inc.
- Supplies computer and VoIP telephony, wireless data, videoconferencing, and other digital communication products.
- Quintum Technologies, Inc.
- Tenor VoIP MultiPath Switches and Gateways from Quintum drop into PBXs or IP PBXs and branch offices to offer nonstop call quality and easy remote management.
- Voice Over IP Calculator
- Offering free VoIP resources including online bandwidth calculators, white papers, books, and a directory and forum.
- Ketchum Integration
- Provides voice data integration services.
- Which VoIP Service Provider
- Compare residential and business VoIP service providers. Features VoIP reviews, forums, blogs, articles, and free VoIP plan search engine.
- VoipSupply.com
- Online reseller of VOIP, IP, and IP telephony equipment.
- PC2Call
- Offers Internet telephony and voice over IP services. Provided by Vectone.
- VoiceConX
- Provides hosted telephone services and voice self-service solutions for a variety of business needs.
- Telchemy
- Develops Quality of Service monitoring software for Voice over IP gateways and other multimedia systems.
- VoIP Providers List
- Source of information on IP telephony providers and related VoIP services worldwide.
- 3CX
- Developers of IP PBX and VoIP phone system software for Windows.
- March Networks
- Offers voice and telephony services over broadband IP and other broadband products and services for a variety of sectors.
- DOW Networks
- Provides international VOIP service to call centres, importers and exporters, and multinational corporations. Also provides international 800 and ITFS service.
- ISPhone
- An Internet telephone network designed for ISPs.
- ITServ Inc.
- Engaged in the design, development, and distribution of personalised Internet communication solutions and services.
- Clarent
- Provider of IP communication technologies.
- Aplio
- Telephone system that allows customers to place long-distance phone calls over the Internet.
- VoIPOnline.com
- Offers news, discussion forum, links, and more.
- dynamicsoft
- Provider of SIP-based software service platforms for mobile communications networks.
- DallasXtreme Ventrilo Servers
- Provides server platform for users of the popular VoiP software.
- SysMaster Corporation
- Provides VoIP billing server, VoIP gateway, IPTV, and Wireless equipment to telecommunication companies and service providers.
- CommWorks
- Provider of IP-based networking services.
- NetCall Telecom@
- VoIPWatch
- Offers news, acronym dictionary, surveys, mailing list, links, and more.
- FacetCorp: FacetPhone
- IP-PBX designed from the ground up to be based on IP telephony. FacetPhone includes a powerful user interface, flexible voice mail, auto-attendant and IVR features, telecommuter integration, branch office support, and more.
- NETXUSA, LLC
- Distributor of VoIP, voice mail, unified messaging, and other computer telephony hardware and software solutions.
- Doretel Communications
- Cisco Partner specialising in complete VoIP solutions. Doretel Communications provides VoIP hardware and services along with SIP proxy servers, calling card and CMS billing solutions, call relay billing platforms, and more.
- VarPhonex
- Offering Internet calling, Internet telephony devices, and other unique telecommunications services.
- VoIP Judge
- Contains VoIP reviews, news, and forums.
- Voyant Technologies, Inc.
- Offers enhanced voice and conferencing solutions for switched and IP-based networks.
- NetNumber, Inc.
- Provider of ENUM technology to the wireless and wireline telecommunications market.
- DSG Technology, Inc
- Manufacturer of IP and Internet telephony gateways including IPStar.
- IP blue Technology Solutions
- Dedicated to VOIP software development and professional services geared towards the financial enterprise.
- Nx Networks
- Offers a suite of telephony and data networking solutions.
- TeleGea, Inc.
- Provider of software solutions for the rapid delivery of IP communications services including IP-VPN and VoIP.
- Actiontec Internet Phone Wizard
- Product information.
- @fax, Inc
- Allows businesses to fax documents through their existing fax machine over the Internet using fax over IP (FoIP) technology.
- GlobalNet
- Delivers IP telephony services to ISPs and telecommunications service providers.
- Mountain West Telecom
- Offers phone system and telecommunication solutions for businesses.
- Mockingbird Networks
- Designs and manufactures a range of IP telephony products.
- Aravox Technologies
- Offers a dynamic firewall that protects the systems and applications used by service providers to deliver VoIP services.
- IP Telecom Inc.
- Offers VOIP, IP PBX telephone, colocation, and other communication services.
- VoIP2Save.com Internet Telephone
- Provides unlimited worldwide calling plans for a low monthly flat rate.
- Mconnect VoIP Services
- Offers full-feature business VoIP services and calling packages.
- Tangerine, Inc.
- Developer of VoIP call managers for enterprises and carriers.
- Vocalcommerce.com
- Features voice over IP programme. Adds web-to-telephone functionality to Internet sites.
- Komodo Technology, Inc.
- Developer of Internet telephony products utilizing VoIP technology.
- Phonevite.com
- Plan or announce upcoming social events by sending personalised voice messages to friends simultaneously via Internet telephony technology.
- IPStarPhone.com
- Internet telephone for free long distance using dial-up, cable, or DSL.
- Dimension Data
- Provides Internet telephony and voice over IP solutions, with partners Cisco.
- Ivron Systems
- Develops hardware and software platforms for sharing web-based and business documents over ISDN and LAN/IP networks.
- HPC Communications
- Providing total solutions which combine elements of voice, data, web, network, and messaging.
- PushNCall.com
- Immediately connects Internet users with companies they want to talk to with the push of a button. For enabled web sites, email, and banner ads.
- KLIP TELECOM
- Local and long distance calling service provider based in Europe offers various VoIP services worldwide.
- AVAD Technologies
- Hosted IP PBX designed to meet the needs of businesses that require advanced multi-location telecommunications solutions.
- Barlam Enterprises
- Offers web design, search engine optimisation, IT solutions, e-commerce services, and IP telephony.
- Ecosmob Asterisk Services
- Ecosmob offers custom and professional Asterisk support, PBX business solutions, VOIP, FAX, and IP software solutions.
- Endstream Communications, LLC
- Endstream Communications is a next-generation carrier focusing on VoIP and telecommunications solutions.
- IconDial
- Make calls free calls from your PC to anywhere in the world by dialing the number and then watching an ad.
- Jetnumbers Communications
- Offers virtual phone numbers and international call forwarding to help users get closer to customers, business partners, or family.
- Junction Networks
- VoIP solutions for business. Junction Networks provides SIP-compliant hosted/virtual PBX, SIP hosting, and PSTN gateway services for companies switching to VoIP.
- Lucky Telecom Corp.
- Offers wholesale A-Z VoIP mobile and proper termination services.
- Mobile VoIP
- Reviews and news on Mobile VoIP providers.
- NextAdvisor.com: VoIP Internet Telephone Comparison
- Compare VoIP services and read reviews at NextAdvisor.com.
- OnSIP Hosted PBX
- Virtual PBX service for businesses of any size. Customers use any IP enabled phones to connect and get outsourced business class voice services with no cost per user, seat, or extension.
- Solution4VOIP
- Complete IP telephony platform offering a variety of services including wholesale VoIP termination, device to phone support, PC to phone and web to phone services, calling cards, SMS/ANI/WEB callback, and more.
- Stimulus Technologies
- Offers business-class VoIP phone service in the Las Vegas area.
- Taridium
- Specialises in VoIP solutions for open standard enterprise and service providers. Includes enterprise PBX with hardware, configuration, and support.
- Telecom Informacia
- Voice over IP (VoIP) solution provider and system integrator offering customer management and billing solutions for entrepreneurs, carriers, VoIP Calling Card operators, and other corporate companies.
- TringMe
- Web-based telephony to keep you connected.
- Voice Reports VoIP Comparisons
- Voice reports features an online tool to compare VoIP providers along with customer reviews of popular VoIP providers.
- cfPBX VoIP Hosted PBX
- Hosted PBX with low monthly fees, combines a multi-extension phone system.
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