This is a list of VOIP Service Providers who offer full service products primarily aimed at the small to medium sized business telephone market. Such companies typically support multi-line telephone systems, small PBX gateways and hosted VoIP (as an alternative to Centrex service). See also:

• VOIP Service Providers Residential Single line residential/business plans go here.
• VOIP Service Providers B2B Bulk origination/termination goes here.
• RIP VOIP VOIP provider cemetery

Service providers operating in more then one country are listed under each country. "Operating in a country" means a provider that has billing and support staff located in the country, and offers service subject to the regulations and consumer protection laws of that country.



Please include relevant information like SIP or IAX handoff, how outgoing CLID is set, whether a given account may originate multiple calls at once, etc.

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Providers in other countries/continents can be found here:

• VOIP Service Providers Business Africa
• VOIP Service Providers Business Asia
• VOIP Service Providers Business Australia
• VOIP Service Providers Business New Zealand
• VOIP Service Providers Business Europe
• VOIP Service Providers Business Middle East
• VOIP Service Providers Business North America

Argentina

• DIGIvoice Telefonia IP - VoIP. Agente Mayorista en Argentina de Heilsberg S.A. Servicio telefónico licenciado por la Comisión Nacional de Comunicaciones (CNC). Canal de comercialización de alcance nacional constituido por Agentes Oficiales Zonales.
• FreePhoNet Wholesale VoIP services for call shop and call centers, now with secure transaction website. Servicios VoIP al por mayor para Locutorios y Call Centers.
• Hablemos Wholesale Provides cheap SIP termination services. No monthly fees, prepayment only, paypal accepted, instant signup with bonus.
• Hablemos Lineas entrantes, llamados salientes, IP PBX virtual, voicemail, servicios de 3er generacion, etc.
• iPonline Phones telefonia IP Proveedor mayorista de minutos, servidores dedicados para VoIP, instalacion y configuracion de IP PBX, numeros entrantes por grandes cantidades, desarrollos a medida.
• http://www.voipcallsecure.com VoIPCall Secure provides subscribers secure-encrypted phone service to businesses and high net worth individuals who want to keep their private phone calls private. Service available across the globe. Includes unlimited subscriber to subscriber calling and pay for service international calling.
• http://www.voipcallsecure.com VoIPCall Secure provides subscribers secure-encrypted phone service to businesses and high net worth individuals who want to keep their private phone calls private. Service available across the globe. Includes unlimited subscriber to subscriber calling and pay for service international calling.
• VoIPServiceArgentina.com. Directory.

Brazil

• NEOVOICE TELECOMUNICAÇÕES Ltda Chamadas de baixo custo com qualidade. Planos para chamadas locais e planos para chamadas DDD (nacionais).Pacotes de minutos variando de mil até 25 mil minutos, além de plano sem compromisso mensal. Planos para empresas, usuários de Asterisk e Cyber Cafés.
• Ditel WDN Brasil Economize fazendo ligacoes pela Internet. VoIP Service Provider, A-Z Termination, VoIP Solutions Provider.
• Terravon Communications, Brasil SIP/IAX/H.323, Servios de VoIP Local e de Longa Distncia, numeros de telefone locais (DIDs), numeros Toll Free (0800) Brasil, EUA, Canada, e 73 outros pa­ses, servios de colo
• Cliconnect Internet Telephony, Brasil Cliconnect provides a simple, reliable and friendly communications tool .Cliconnect offers free global telephony, to make unlimited, superior quality voice calls via its next-generation peer-to-peer software.
• LIBRA TELECOMUNICA veis para todo o Brasil e para o mundo. Entre em contato conosco (37)3212-9349 ou pelo email libratelecom@yahoo.com.br
• http://voip.melig.com.br Brazilian Voip service from one of the largest Internet Portals and Internet Provider in Brazil , free voip calls between users , free of signature charges .
• http://www.voipcallsecure.com VoIPCall Secure provides subscribers secure-encrypted phone service to businesses and high net worth individuals who want to keep their private phone calls private. Service available across the globe. Includes unlimited subscriber to subscriber calling and pay for service international calling.
• http://www.voipcallsecure.com VoIPCall Secure provides subscribers secure-encrypted phone service to businesses and high net worth individuals who want to keep their private phone calls private. Service available across the globe. Includes unlimited subscriber to subscriber calling and pay for service international calling.
• http://www.blasterphone.net BlasterPhone offers features-reach, high-quality Internet Telephony services and solutions to individual users, small companies, large enterprises and carriers worldwide. We provide with unmatched Customer Care and Technical Support and are ready to meet and exceed your expectations.
• VoIPServiceBrazil.com. Directory.

Chile

• iPonline Phones telefonia IP Proveedor mayorista de minutos, servidores dedicados para VoIP, instalacion y configuracion de IP PBX, numeros entrantes por grandes cantidades, desarrollos a medida.
• VoIPServiceChile.com. Directory.

Colombia

• http://www.ipcolombia.com Servicios y soluciones en todo tipo de comunicaciones IP, Integracion de sistemas voz y datos, Automatizacion de servicios de atencion al cliente.
• http://www.vipsiontech.com Soluciones integrales de Telefonia Privada IP, VoIP, Soluciones y desarrollos a la medida sobre Asterisk. Proveedores de equipos VoIP, sip, H323.
• binnacleita proveedores de equipos VoIP sip, H323 con oficina en Bogota Colombia.
• FordVoice(tm) Servicios de Telefonia VoIP, Plataforma a traves de Tier-1 para tarjetas de llamadas de larga distancia. Proveemos terminacion y origen en US, CAN, Reino Unido, Argentina, Brazil, Spain, Venezuela, Mexico, y Ecuador pronto estaremos con origen en Colombia.
• Hablalatino - Proveedores de DIDs (lineas virtuales, numeros de telefonos, IP Phone, PBX virtual) en Bogota, Cali, Medellin, Barranquilla,Bucaramanga. (in English) DIDs, Telephone numbers, and more in Bogota, Cali, Medellin, Barranquilla,Bucaramanga.
• iPonline Phones telefonia IP Proveedor mayorista de minutos, servidores dedicados para VoIP, instalacion y configuracion de IP PBX, numeros entrantes por grandes cantidades, desarrollos a medida.
• MundiCalls - Proveedor de servicio VoIP. Telefonos IP, ATAS, Telefonos USB, Terminacion mundial de llamadas de larga distancia. Numeros Virtuales, DIDs, Conferencia telefonica, Buzon de llamadas, Transferencia de llamadas.
• http://www.voipcallsecure.com VoIPCall Secure provides subscribers secure-encrypted phone service to businesses and high net worth individuals who want to keep their private phone calls private. Service available across the globe. Includes unlimited subscriber to subscriber calling and pay for service international calling.
• VoIPServiceColombia.com. Directory.

Costa Rica

• iPonline Phones telefonia IP Proveedor mayorista de minutos, servidores dedicados para VoIP, instalacion y configuracion de IP PBX, numeros entrantes por grandes cantidades, desarrollos a medida.
• PBX Virtual de Costa Rica Provider of Asterisk PBX systems and IP telephones. Based in San José.
• Dow Networks Costa Rica - Complete VoIP Solution Provider, Toll free, 1-800, ITFS from 80 countries, UIFN from 30 countries, DID, IP PBX and IP Call Center.
• Costa Rica Telecom - Virtual PBX and Centrex systems, DIDs, Private Telecom networks and Call Center outsourcing.

El Salvador

• iPonline Phones telefonia IP Proveedor mayorista de minutos, servidores dedicados para VoIP, instalacion y configuracion de IP PBX, numeros entrantes por grandes cantidades, desarrollos a medida.
• Vozcafe International, El Salvador - Wholesale rates, International VOIP origination and termination, specializing in internet cafes and corporate enterprise. 01
• http://www.voipcallsecure.com VoIPCall Secure provides subscribers secure-encrypted phone service to businesses and high net worth individuals who want to keep their private phone calls private. Service available across the globe. Includes unlimited subscriber to subscriber calling and pay for service international calling.

Mexico

• iPonline Phones telefonia IP Proveedor mayorista de minutos, servidores dedicados para VoIP, instalacion y configuracion de IP PBX, numeros entrantes por grandes cantidades, desarrollos a medida.
• Syner IP International long distance SIP and IAX termination, DIDs from Mexico with unlimited inbound calls starting at $5 a month. Prepaid and rent plans available. Asterisk consulting, training, custom application development and billing systems.
• Athena Soft : VoIP Services
• binnacleita proveedores de equipos VoIP sip, H323 con oficina en MÃ���Ã�¯Ã�¿Ã�½Ã���Ã��Ã�©xico D.F
• Suavemente, S.A. de C.V. VoIP SIP Services for home and business and providers. Specializing in Servicing Call Centers and Asterisk end users or Asterisk ITSP's.
• SuperNetTel VoIP Serving the World, Sirvir el Mundo, offering flat rate calling plans, DIDs, Tarifas Fijas
• ZingoTel Global Broadband Phone Service provider. Serving US, Canada, Latin America, and beyond.
• http://www.voipcallsecure.com VoIPCall Secure provides subscribers secure-encrypted phone service to businesses and high net worth individuals who want to keep their private phone calls private. Service available across the globe. Includes unlimited subscriber to subscriber calling and pay for service international calling.
• VoIPServiceMexico.com. Directory.

Panama

• Cyber Cast Intl Centrales Telefonicas Asterisk. Canal Autorizado Polycom. Soluciones en Centrales Telefonicas IP, Call Center, Servicio de Centrex
• iPonline Phones telefonia IP Proveedor mayorista de minutos, servidores dedicados para VoIP, instalacion y configuracion de IP PBX, numeros entrantes por grandes cantidades, desarrollos a medida.
• VoIPServicePanama.com. Directory.

Peru

• IPBusinessSoluciones de voz sobre ip, punto a punto, centrales asterisk, Locutorios. Las mejores tarifas para llamar a Peru
• Iaxin: VoIP Services, Wholesale Sip/Iax Termination
• iPonline Phones telefonia IP Proveedor mayorista de minutos, servidores dedicados para VoIP, instalacion y configuracion de IP PBX, numeros entrantes por grandes cantidades, desarrollos a medida.
• Soluciones VoIPSoluciones de Telefonia IP, Servicios a Per?erica Latina(Soluciones OpenSource).
• TeleIPSoluciones de telefonia en general, desde lo mas tradicional hasta lo ultimo en telefonia IP. Todo tipo de equipos, desde telefonos IP y gateways VoIP hasta soluciones completas con centrales telefonicas IPBX.
• Infobox SACDesarrollo de IVR, implementaciÃ���Ã�¯Ã�¿Ã�½Ã���Ã��Ã�³n de call center, integracion CT.
• IBS Technologies SACIntegración de Telefonia IP Sobre plataformas existentes, Implementación de Call Center, Interconexión de Oficinas, Anexos Extendidos y/o remotos, Internet Satelital, VPN para empresas, Aplicaciones Web : Callback - WebPhone, etc.

Venezuela

• Comtel Networks, Corp. Providers of the brand new popular MAXIMA calling cards, most cost-effective cards you will ever find. We also provide all kinds of services, PBX, Broaband Phone Lines with Adapters, on-line CDRs, Export to PDF and CSV, Realtime billing.
• iPonline Phones telefonia IP Proveedor mayorista de minutos, servidores dedicados para VoIP, instalacion y configuracion de IP PBX, numeros entrantes por grandes cantidades, desarrollos a medida.
• http://www.voipcallsecure.com VoIPCall Secure provides subscribers secure-encrypted phone service to businesses and high net worth individuals who want to keep their private phone calls private. Service available across the globe. Includes unlimited subscriber to subscriber calling and pay for service international calling.
• VoIPServiceVenezuela.com. Directory.