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
Keyhan Telecom Inc. is a wholesale carrier company that is specialized on termination and origination services for “mobile and landline around the globe. We are a wholesale carrier based in Toronto, Canada.