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
CoreTel promises to leverage its interconnection knowledge and expertise to provide a reliable wholesale VoIP network which will allow our customers to develop and manage a wider choice of dynamic phone services for the consumer.