VOIP providers that provide interconnection between Asterisk installations and the PSTN. Please include ONLY providers that offer to originate or terminate calls via SIP or IAX2 to an Asterisk server, without creating a violation of their published terms of service. All these services should be suitable for use by call centers and high volume inbound users.


A business VOIP phone system can reduce your monthly phone bill tremendously compared to a traditional business phone system. A business VOIP solution can be a hosted PBX system, as well as an on-premise PBX solution. Below are sponsored listings of business VOIP service providers in Europe.