SaskTel International (SI) managed a turnkey project to replace over 1500km of old open wire facilities carrying telephone, train signaling and trackside communications with a fibre optic network between Morogoro and Dodoma in Tanzania. Fiber optic networks are categorized into three groups, namely core, backbone, and access/last mile fiber optic networks. The core fiber optic network is the undersea fiber optic connecting international internet traffic via submarine cable landing stations, whereas the backbone fiber optic network. Raddy Fiber Manufacturing (T) Limited, a subsidiary of our parent company, is strategically located in Mwanambaya, a part of the Mkuranga district within the Coast Region, conveniently situated just 25 kilometers from Dar-es-Salaam. What we do iGroup offers total. Expertism on fiber networks: Design and infrastructure deployment for FTTx, FTTh, FTTs or others for underground, aerial or submarines solutions. Determining the type of communication system (s), the geographic layout and the transmission equipment required. While submarine communications cables are used to connect countries and continents to the Internet, terrestrial fibre optic cables are used to extend this connectivity to landlocked countries or to urban centers within a country.