It is a device capturing and controling all the signals, which are being created by the whole system, especially the made and received phone call signals. The device is mostly used for connecting regular phone system with the Internet and backwards.
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
Read more