STL is a global leader in end-to-end data network solutions.

We design and deploy high-capacity converged fibre and wireless networks. With expertise ranging from optical fibre and cables, hyper-scale network design, and deployment and network software, we are the industry's leading integrated solutions provider for global data networks. We partner with global telecom companies, cloud companies, citizen networks and large enterprises to design, build and manage such cloud-native software-defined networks.

STL has innovation at its core. With intense focus on end-to-end network solutions development, we conduct fundamental research in next-generation network applications at our Centres of Excellence. STL has strong global presence with next-gen optical preform, fibre and cable manufacturing facilities in India, Italy, China and Brazil, along with two software-development centres across India and one datacentre design facility in the UK.

STL - Anil-Agrawal

STL has continuously evolved over the years to create solutions that transform lives across the planet effectively. We have added capacities and capabilities that allow us to lead nations into the next generation of communication technologies. In India, we are uniquely positioned to enable realisation of national vision of creating Digital India, Make in India and 100 Smart Cities.

Anil Agarwal – Chairman, STL


Giorgio & Ewald - Vumatel, South Africa

" I would like to take this opportunity to thank you for everything that STL did to make our visit to your country a very wonderful experience.

I can't explain how impressed we were by STL and all aspects that we observed at your cabling and glass plants. It was very reassuring to see an environment and culture that values its people so highly, and most importantly are committed to producing a world class product for their customers. It is good to know that the investment we are making is going to be sustainable for the long term. "

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Anton Bote - FTTX Energy, South Africa

" I would like to take the opportunity to thank you for the visit to STL. We were treated like royalty. We were very impressed by the humble and proud, friendly, highly educated team of individuals at the various plants. The technology behind making the glass preforms was mind blowing. We were very impressed by the paperless quality processes and how each and everything has a KPI measuring the performance. The amount of times each fibre gets tested as it goes through the process to form part of a cable have confirmed our confidence that we are working with the superior quality product. The amount of investment in the world class plants and also the great working environment you created for your staff is the best I have seen. We are very excited about new products that we identified, such as the aerial cable solution and the MDU solution displayed in your offices.

Visiting India for the first time was something very special. We can clearly see your country going in the right direction.

Again thank you for a memorable visit, We are proud to be associated with STL "

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US $727
mn Revenues*

Offices in

Serving customers in

3 Innovation Centers

358 Patents

The STL Story

Demerger of power and telecom businesses STL becomes pure-play telecom company

Acquisition of Telecom Software Services Company - Elitcore Technologies

Inauguration of Telecom R&D Centre of Excellence at Aurangabad

Roll out of end to end Broadband Networks (NFS Project)

JV in China & Brazil for Fibre & Cables manufacturing 20 MFKM Fibre capacity

Power Grid & FTTx Infrastructure business

Power Conductors Business

Optical fibre Manufacturing 0.5 MFKM Fibre capacity

Fibre optic cables manufacturing

Copper cables manufacturing