PROTEI is an international telecommunication systems vendor operating in Eastern Europe, Russia, Central Asia, Latin America, the Middle East and Africa, having a proven track record of over 18 years. Under PROTEI brand we present cost effective carrier-class solutions. Using the latest convergent technologies implemented in our products the most innovative services can be delivered. PROTEI product line covers all needs of mobile and MVNO operators: core network, roaming, charging, IN and VAS, messaging and so on. Our products can be altered according to any requirements. PROTEI serves 400 renowned customers in 28 countries to cater 200 million subscribers worldwide.