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
Shetab phone-to-phone service has been stabilished in 1380 (2001), presenting a pleasant quality in international calls, using VoIP technology via E1 digital lines.Shetab provides various facilities for customers comfort and hospitality, w