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

Information on voip Services & products including voip termination.

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

OnSIP by is a hosted pbx solution for small and medium-sized businesses. Features include voicemail, conference, free and unlimited extensions, free SIP calling, auto attendant, ACD Queues and more.

OpenTone Communications Philippines is a Philippine VoIP company offering VoIP services in the Philippines and International.

Membership service enables customers to make free calls via internet using their supplied USB phone, which is charged monthly.

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

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Danfon Communications Inc offers a state-of-the-art IP-based PBX solution to your corporate office. Danfon Communications Inc is the provider of high value, high quality, Voice over internet Protocol (VoIP) solutions to individuals and companies worldwide at very low rates. DanFon’s solution adds powerful features such as voicemail, conference calling, interactive voice response system, company directory, call forwarding, quick and easy international Phone calls with Remarkable Cost effective service providers

VoIP service for phone-to-phone with adapter or peer-to-peer.