Topic Category
Digital Infrastructure
The physical and logical systems that carry, store, and process digital information — from the undersea cables linking continents to the data centres powering cloud services, and the fibre networks connecting South African homes to the global internet.
Of international data travels via submarine cables
Homes connected by fibre in South Africa
Major cloud regions now operating in South Africa
Of data centre energy goes to cooling systems
Why This Matters
Infrastructure is the invisible foundation of the digital economy
When you stream a video, send a payment, access government services online, or use a mobile app — you are depending on physical infrastructure that most people never see and few understand. Data centres, submarine cables, fibre networks, and cloud platforms are the roads, ports, and power stations of the digital age. Who owns them, who regulates them, and who has access to them determines the shape of South Africa's digital future.
Tier 4
Highest data centre certification — 99.999% uptime guarantee
Key Facts
- A server rack in a data centre can draw as much power as 40 household kettles running continuously
- South Africa hosts Africa's largest concentration of Tier 3 and Tier 4 certified data centres
- Cooling accounts for 30–40% of a data centre's total energy consumption
- The POPIA Act requires that personal data of SA citizens must often be stored within SA borders
Data Centres: Where the Internet Lives
Every website you visit, every email you send, and every app you use is ultimately processed and stored in a data centre — a specialised facility packed with servers, cooling systems, and redundant power supplies. South Africa is the continent's primary data centre hub, with facilities in Johannesburg and Cape Town serving as gateways for Sub-Saharan Africa. Understanding how data centres work, who owns them, and where they are located has profound implications for data sovereignty, latency, and national security.
99%+
Of global internet traffic carried by submarine cables, not satellites
Key Facts
- The SEACOM cable (2009) was the first major high-capacity cable on the east coast of Africa
- WACS, ACE, SAT-3, and 2Africa are among the major cables serving South Africa
- A single submarine cable can carry over 200 terabits of data per second
- Cable cuts — caused by ship anchors, earthquakes, or sabotage — can disrupt entire countries' internet
Undersea Internet Cables & Africa's Connectivity
The vast majority of international internet traffic — over 99% — travels not through satellites, but through submarine fibre optic cables lying on the ocean floor. Africa is connected to the global internet through a series of cables running along its coastlines, with major landing stations in Cape Town, Durban, Mtunzini, and Port Elizabeth on the east and west coasts. The ownership, routing, and capacity of these cables directly determines Africa's internet speeds, prices, and resilience.
2.5M+
Homes passed by fibre in South Africa (2025)
Key Facts
- Fibre can carry data at speeds up to 1 Tbps — far exceeding copper (ADSL) or wireless (LTE) alternatives
- Fibre-to-the-Home (FTTH) delivers the cable directly to your premises — the gold standard
- Fibre-to-the-Curb (FTTC) or -Node (FTTN) still uses copper for the final connection — reducing performance
- South Africa's fibre penetration is approximately 2.5 million homes as of 2025 — growing rapidly
Fibre Optic Networks: How Data Travels at the Speed of Light
Fibre optic cables transmit data as pulses of light through glass or plastic threads thinner than a human hair. They are the fastest, highest-capacity, and most reliable medium for transmitting digital information over long distances. South Africa is in the midst of a major fibre rollout — with Vumatel, Openserve, Octotel, and Herotel competing to connect homes and businesses with fibre-to-the-home (FTTH) infrastructure. Understanding the difference between fibre, ADSL, and LTE helps you make informed decisions as a consumer.
2020
Year AWS opened Africa's first dedicated cloud region in Cape Town
Key Facts
- AWS Africa (Cape Town) and Microsoft Azure South Africa North (Johannesburg) are the two SA cloud regions
- Cloud computing operates on three main models: IaaS (infrastructure), PaaS (platform), and SaaS (software)
- South Africa's public sector cloud adoption is governed by the Government Cloud Policy Framework (2023)
- Load shedding is a major challenge for cloud adoption — data centres use diesel generators and UPS systems
Cloud Computing Explained
Cloud computing is the delivery of computing services — servers, storage, databases, networking, software, analytics, and AI — over the internet ('the cloud'). Instead of owning physical infrastructure, organisations rent it from cloud providers like Amazon Web Services (AWS), Microsoft Azure, or Google Cloud. AWS and Microsoft have both established local cloud regions in South Africa (Johannesburg), dramatically reducing latency for African customers and unlocking data residency compliance. For small businesses and government alike, cloud computing has fundamentally changed how digital services are delivered.
JINX
Johannesburg IXP — one of Africa's busiest internet exchange points
Key Facts
- JINX is one of the largest IXPs in Africa, handling hundreds of gigabits of traffic per second
- IXPs reduce the cost of local traffic by eliminating international transit fees
- ISPA (Internet Service Providers' Association) plays a key role in coordinating IXP governance
- Without IXPs, local content like South African streaming services would be dramatically slower
Internet Exchange Points (IXPs) & Local Routing
An Internet Exchange Point (IXP) is a physical location where different internet networks connect and exchange traffic directly with each other — without routing it through an overseas hub. South Africa's JINX (Johannesburg Internet Exchange) and CINX (Cape Town Internet Exchange) are critical pieces of infrastructure that keep local internet traffic local, dramatically reducing latency and cost. Without IXPs, a message between two South Africans in the same city might route through London or New York before arriving — adding hundreds of milliseconds of delay and international bandwidth cost.
POPIA
SA's data protection law — governs where your data can legally be stored
Key Facts
- POPIA restricts the transfer of personal information to countries with inadequate data protection laws
- The SA government's cloud policy requires sensitivity classification before any cloud migration
- Telkom, Liquid Intelligent Technologies, and Dark Fibre Africa own significant national fibre backbone
- SADC has a Regional Infrastructure Development Master Plan covering cross-border connectivity
Data Sovereignty & Infrastructure Policy
Data sovereignty refers to the principle that digital data is subject to the laws of the country in which it is located or collected. For South Africa and the African continent, this raises profound questions: Where is government data stored? Who owns the infrastructure? What happens when a foreign-owned cloud provider receives a US subpoena for South African citizens' data? POPIA (Protection of Personal Information Act) and the DCDT's (Department of Communications and Digital Technologies) policy frameworks are attempting to navigate these challenges — but awareness among citizens and businesses remains low.
Infrastructure Challenges
The digital infrastructure challenges facing South Africa
South Africa faces unique structural challenges to its digital infrastructure — from load shedding threatening data centre uptime, to the concentration of ownership in a small number of private operators, to the urban-rural digital divide. Awareness of these challenges is the first step toward demanding better policy outcomes.
Load Shedding & Uptime
Data centres must maintain constant power. South Africa's load shedding costs the digital economy billions in generator fuel, battery replacement, and downtime risk annually.
Ownership Concentration
A small number of private companies — Telkom, Vumatel, MTN, Vodacom — own the majority of SA's digital backbone. This concentration shapes pricing and access policy.
Urban-Rural Divide
High-speed fibre and data centre infrastructure is overwhelmingly concentrated in Johannesburg and Cape Town. Rural communities remain largely dependent on mobile LTE.
Cable Cut Vulnerability
South Africa's international connectivity can be severely disrupted by a single submarine cable cut. Redundancy planning and cable diversification remain ongoing concerns.
Official resources & further reading
DCDT — Department of Communications & Digital Technologies
SA government digital infrastructure policy and legislation
AfricaConnect — Submarine Cable Map
Interactive global map of all submarine internet cables
ISPA — Internet Service Providers' Association
SA's primary ISP industry body — consumer advice and policy positions
AWS Africa (Cape Town) Region
Amazon Web Services' dedicated cloud infrastructure for Africa
JINX — Johannesburg Internet Exchange
South Africa's primary internet exchange point statistics and membership
ITWeb Digital Infrastructure News
South Africa's leading technology news publication covering infrastructure
Continue Learning
Explore the full AADEIP Digital Series
Each module is a 5–15 minute deep-dive into the infrastructure systems that shape your digital life — with video, infographic, and a full knowledge article. New modules every 3–4 weeks.