Asterisk
An open source telephony switching and private branch exchange service. Allows peer-peer calling using a variety of voice over internet protocols.
http://asterisk.orgAsylum Telecom
VoIP provider for business and residential customers. No service charges.
http://www.asylumtel.com
BroadVoice
VoIP provider offers full feature set with voice mail, caller ID, etc. Requires supplied broadband phone adapter.
http://www.broadvoice.com/
CallDaddy
Pre-paid VOIP services. H.323 IP phone, gateway, gatekeeper, NetMeeting or any other H.323 compliant terminal necessary.
http://www.calldaddy.com
Calleveryone.com
A full featured VoIP/broadband phone to phone service primarily for calls within the US.
http://www.calleveryone.com
Callserve
PC-to-Phone service for outbound calls only. Software download required.
http://www.callserve.com
Dial2Home
VoIP service for phone-to-phone with adapter or peer-to-peer.
http://www.dial2home.net/
Dialpad Communications, Inc.
Offers monthly billing and pre-paid PC-to-Phone VoIP services. Also supports broadband telephone adapter for use without PC.
http://www.dialpad.com
Dow Networks
Provides Voice over IP and telecom service to international clients.
http://www.downetworks.com
Efonica
Prepaid system for PC-to-phone and web initiated phone-to-phone using VoIP.
http://www.efonica.com
Free World Dialup
Community network allowing calls to toll free numbers in the US, Japan, UK and Netherlands. Peer-peer calling to other members.
http://www.freeworldialup.com/
iConnectHere
Offers VoIP-based PC-to-Phone, Broadband Phone and Calling Card services.
http://www.iconnecthere.com/
IPCB.net
Softswitch services such as routing, billing as well as VoIP call termination.
http://www.ipcb.net
ISPhone Inc.
Wholesale voice over internet services.
http://www.isphone.net/
MeaPhone
PC to phone service based in Thailand. Software download required.
http://www.meaphone.com
Mywebcalls
PC-Phone or device-to-phone United Kingdom based service.
http://www.mywebcalls.com/
On Instant
PC-to-PC only isntant messaging service with VoIP features including live voice, voicemail and CRM tools.
http://www.on-instant.com
One Unified Net
A communications infrastructure provider includes IP systems, services, softswitches, and phones.
http://www.oneunified.net
Packet8
Voice over internet direct dial service without a PC. Owned by 8X8, Inc.
http://packet8.net
PC2call
PC-phone internet voice service provider based in the United Kingdom.
http://www.pc2call.com/
Redshift Networks
Operates and builds international carrier networks using VoIP and TDM circuit transmission technologies.
http://www.redshiftcorp.com
RhinoBell
PC to phone, phone to phone using device, voice over internet calls.
http://www.rhinobell.com/
RNI Communications Corp.
Converged voice and data service using VoIP with adapter to enterprise and business customers.
http://www.rubiconplus.com/
SIPphone Inc.
Peer-peer calling service. Requires SIP adaptor and phone.
http://sipphone.com
Skype
Peer to peer internet voice service. Requires PC for both callers.
http://skype.com
Super Technologies, Inc
Offers flat-rate unlimited calling within USA & Canada. Uses analog telephone handsets via broadband telephone adapter.
http://www.virtualphoneline.com
Talafone
Canadian based provider of PC-to-phone and IP phone services and hardware.
http://www.talafone.com
v59
Use dial-up and talk everywhere with our VoIP service
http://www.v59.net
Vinculum Communications
VoIP wholesale international termination services provider.
http://www.vincomm.net
VocalNet
VoIP provider offering residential and business plans.
http://www.vocal-net.net/
Vodawave
Residential and enterprise VoIP plans plus gateways, gatekeeper and billing software.
http://www.vodawave.com
Voice over IP Calculator
Free VoIP resources, including online bandwidth calculators, white papers, books, a directory and a forum.
http://www.voip-calculator.com/
Voiceglo
VoIP service offering free and paid plans. Some plans require phone adapter or USB phone with an Internet-connected computer.
http://www.voiceglo.com
VoicePulse
VoIP service offering phone-to-phone with device. Various features and calling plans.
http://www.voicepulse.com/
VoIP Providers List
Information exchange for VoIP partners offering minutes termination and origination, as well as hardware and software trade.
http://www.voipproviderslist.com
VoIPOnline
Voice-over-IP news, supplier directory and chatrooms for discussing related industry topics.
http://www.voiponline.com
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.
http://www.voipxchange.net
Vonage
Provides voice over internet local dial-tone service. No PC required. Uses analog telephone with broadband telephone adapter.
http://vonage.com/
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