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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.

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.

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

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

Provides Voice over IP and telecom service to international clients.

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

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