The cable infrastructure enabling South Africa’s access to the Internet has drastically improved over the past 25 years, increasing capacity from 560 Mbps to over 400Tbps.
The cable infrastructure enabling South Africa’s access to the Internet has drastically improved over the past 25 years, employing new means of multiplexing and increasing capacity from 560 Mbps to over 400 Tbps.
This was done using existing fibre optic cables and transferring the data via the E-band and S-bands — which are not used in commercial wires. The total data transferred is the equivalent of transferring 1,800 4K movies over the Internet in one second. The wavelength affects the attenuation of light transmitted through a medium caused by scattering and absorption.
Optical amplifiers can amplify optical signals without first converting them into electrical signals. The next cable installed was the privately owned Seacom cable in 2009, which also employs Erbium-doped optical fibre amplifiers and over 150 repeaters along the entire cable system. Its initial design capacity was 680 Gbps, which was upgraded to 4.72 Tbps the following year using Alcatel Submarine Network’s 40 Gbps wavelength technology.EASSy’s latest upgrade employs Ciena’s GeoMesh Extreme technology, giving the system a total capacity of 36 Tbps and the South African section a 10 Tbps capacity.The West African Cable System landed in South Africa in 2012 with a design capacity of 5.12 Tbps, an increase from the planned 3.84 Tbps.
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