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
Aianna is a Global provider of telephony services, that was established at the vision of one man who was tired of the lack of service and quality that carriers were giving to their clients in the telecommunications industry.