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
Advanced Innovative Technologies Inc., was founded in 1988 as an engineering research and product development firm. The areas of expertise encompassed range from Information Technology (IT) to advanced materials and telecommunications.