Concerning practical implementation, the VoIP gateways have proven to be the best. Many companies are successfully using the IP telephony thanks to its two main characteristics
Decrease in international and long distance call cost expenditures
Stable communications between company’s offices throughout different cities and counties
i3 Voice & Data, Inc. d/b/a i3 networks was founded to provide a single point of contact for efficient and affordable telecommunications and data solutions for carriers and enterprise.