Subex Systems has won a contract from Mascom Wireless, Botswana, to instal its RevMax TM revenue maximization suite that consists of the Fraud Management System, Ranger TM and the Revenue Assurance System, INcharge TM.According to a release issued by Subex to the BSE, the contract encompasses the supply, implementation, training and support of these solutions, covering both the postpaid and prepaid customers.Subash Menon, President & CEO of Subex Systmes, commenting on the contract, said, "Our extensive efforts in the African region, right from the beginning of the launch of our products, is based on our belief in the potential of this region. The Mascom deal further strengthens our leadership position as a revenue maximization vendor of choice among African telcos".