Tempest Telecommunications is an top ISP in South Africa, but its headquarter is registered in the US. They have been providing communications services mainly for travelers. To the scope of their services we may add Internet access and Voice and data services. Their aim is to give their customers the tools to be connected before arriving in their destination. They offer both dial-up and Wi-Fi Internet service in South Africa.
ISDN is a very popular and paticular protocol (Integrated Services Digital Network) that is needed by certain applications. ISDN service is billed on a per minute basis. (* It’s assumed that prices are given in USD on the main companies website).