IP Telephony - Service Providers

Asterisk - An open source telephony switching and private branch exchange service. Allows peer-peer calling using a variety of voice over internet protocols.

Asylum Telecom - VoIP provider for business and residential customers. No service charges.

AT&T CallVantage Service - Broadband phone service from AT&T. Consumer VOIP plans includes unlimited calling within USA and Canada.

BroadVoice - VoIP provider offers full feature set with voice mail, caller ID, etc. Requires supplied broadband phone adapter.

Callconomy Solutions - Provides international VoIP call shop services. Includes FAQ.

CallDaddy - Pre-paid VOIP services. H.323 IP phone, gateway, gatekeeper, NetMeeting or any other H.323 compliant terminal necessary.

Calleveryone.com - A full featured VoIP/broadband phone to phone service primarily for calls within the US.

Callserve - PC-to-Phone service for outbound calls only. Software download required.

Calltower, Inc. - US-based B2B VoIP provider offers enterprise class hosted VOIP PBX Systems.

Click4netphone - Pre-paid Internet Telephony Services via VOIP.

Cliconnect Internet Telephony - Offers a variety of domestic and international VoIP plans including unlimited calls to individual countries for fixed fee.

CTL Inc. - CT-based, manufacturer of VOIP-based voice-messaging systems utilizing Session Initiation Protocol (SIP) and Host Media Processing (HMP).

Dialpad Communications, Inc. - Offers monthly billing and pre-paid PC-to-Phone VoIP services. Also supports broadband telephone adapter for use without PC.

Dow Networks - Provides Voice over IP and telecom service to international clients.

Efonica - Prepaid system for PC-to-phone and web initiated phone-to-phone using VoIP.

Evolve Communications - Vancouver, Canada based provider. Includes rate plans, description of technology, and FAQ.

Free World Dialup - Community network allowing calls to toll free numbers in the US, Japan, UK and Netherlands. Peer-peer calling to other members.

iConnectHere - Offers VoIP-based PC-to-Phone, Broadband Phone and Calling Card services.

IPCB.net - Softswitch services such as routing, billing as well as VoIP call termination.

IPgrade - B2B Wholesaler of VoIP-based Phone-to-Phone, PC-to-Phone, DDI, VPN, CRM, prepaid calling cards, and broadband services.

ISPhone Inc. - Wholesale voice over internet services.

Lingo, Inc. - Residential and business plans offering unlimited calls to U.S. and Canada using any phone with provided adapter. Plans available for unlimited calls to Europe, Asia, Mexico. Includes basic and advanced calling features, free fax line, and choice of local number portability or selecting from 220 U.S. area codes or 15 countries.

MeaPhone - PC to phone service based in Thailand. Software download required.

Mobif - Malaysian based VoIP provider offering adaptor and softphone products available through resellers.

My VoIP Store - Australian-based (Brisbane) VoIP consultant and B2C e-commerce site for VoIP hardware.

Mywebcalls - PC-Phone or device-to-phone United Kingdom based service.

On Instant - PC-to-PC only isntant messaging service with VoIP features including live voice, voicemail and CRM tools.

One Unified Net - A communications infrastructure provider includes IP systems, services, softswitches, and phones.

OneAccess Networks - Broadband access solutions including IP routers, voice over IP (VoIP) and voice over DSL (VoDSL) solutions, concentrators and networks adapters.

Onramp Access - Provides business oriented VoIP services across fully managed T1 connections.

Packet8 - Voice over internet direct dial service without a PC. Owned by 8X8, Inc.

PC2call - PC-phone internet voice service provider based in the United Kingdom.

PingTone - Business VoIP provider geared toward companies deploying Cisco Systems IP Phones.

Pulse TeleSystems - Offers VoIP services: phone-to-phone, device-to-phone and PC-to-phone in India, Canada, France, Germany, Malaysia, Nepal, Srilanka and UK.

Reach Out IT, Inc. Technology Outsource - VoIP telecom consultants serving Massachusetts, Rhode Island and Connecticut. Implements Linux-based open source Asterisk PBX systems.

RhinoBell - PC to phone, phone to phone using device, voice over internet calls.

SCS Telecom GmbH - German-based B2B VOIP provider offers services to local call-shop owners and calling card telcos.

SIPphone Inc. - Peer-peer calling service. Requires SIP adaptor and phone.

Skynet Telesystems - Broadband VoIP and dialaround system offers calls to select foreign countries as part of plan.

Skype - Peer to peer internet voice service. Mac, Windows and Linux versions available. Users may call landlines and cellphones for a fee; users may call each other for free.

Skype - The whole world can talk for free. - Skype is a little program for making free calls over the internet to anyone else who also has Skype. It’s free and easy to download and use, and works with most computers. Download Skype now or learn more about Skype.

Snaptel Communications - Offers pre-paid PC-to-Phone VoIP services worldwide. Uses Netmeeting.

SunISP - SIP based VoIP phones and service plans with focus on Caribbean and South America.

Super Technologies, Inc - Offers flat-rate unlimited calling within USA & Canada. Uses analog telephone handsets via broadband telephone adapter.

Syberdyne Systems - Edmonton, Alberta Canada-based corporate VoIP solution provider.

Talafone - Canadian based provider of PC-to-phone and IP phone services and hardware.

Texas Instruments VoIP Solutions - B2B manufacturer of VoIP equipment including IP Phones, VoIP Gateways, High Density Gateways, voice-enabled Cable & DSL Modems.

TMCNet on the web - Instustry trade news publisher featuring VoIP news, VoIP forum (including termination routes), call center news, CRM, telecommunications news, and self-produced VoIP tradeshows.

UNIVoIP - Residential and business VoIP services. Monthly and annual plans available.

v59 - Use dial-up and talk everywhere with our VoIP service

Vanguard Networks Pte Ltd - Singapore provider of VoIP services including video conferencing, international connectivity, bandwidth management and electronic whiteboard.

Vinculum Communications - VoIP wholesale international termination services provider.

VocalNet - VoIP provider offering residential and business plans.

Voice over IP Calculator - Free VoIP resources, including online bandwidth calculators, white papers, books, a directory and a forum.

Voiceglo - VoIP service offering free and paid plans. Some plans require phone adapter or USB phone with an Internet-connected computer.

VoicePulse - VoIP service offering phone-to-phone with device. Various features and calling plans.

Voipia Networks, Inc. - Business & Residential VoIP programs; software solutions for Call Centers.

VoIPOnline - Voice-over-IP news, supplier directory and chatrooms for discussing related industry topics.

VoipXchange - B2B VoIP exchange platform for carriers to buy/sell excess capacity on VoIP networks covering call termination in 250+ countries. No-fee membership required.

Vonage - Provides voice over internet local dial-tone service. No PC required. Uses analog telephone with broadband telephone adapter.

Voxilla - News, forums, reviews and guides for IP telephony devices and services.

WERCS Communications - US-based B2B VoIP telephony provider offering converged ip voice and data network services to customers in Wyoming and Rocky Mountain region.

WhistlerTel Inc. - US provider of broadband internet phone service and voice over IP (VoIP) solutions.

World On IP - Italy-based B2B VoIP provider offering hardware to set-up wireless VoIP networks.