Let us take you through

Our incredible journey of years

  1. 1988

    Humble Beginnings, Bold Ambition

    With a dream to take India to the technological forefront, Anil Agarwal established a copper cable manufacturing unit in Aurangabad, India - the early beginnings of what would become STL.

  2. 1993

    Entering the World of Optical Fibre

    To fuel growing aspirations as a technology pioneer, STL established an optical fibre cable manufacturing unit in Silvassa, expanding STL’s capabilities as well as its horizons.

  3. 1995

    The First Chapter in the STL25 Story

    We established our first optical fibre plant in Aurangabad, India - a move that would define STL’s identity for the next 25 years.

  4. 2002

    A Growing Portfolio of Customer Needs

    To fulfil ever-evolving customer needs, a data cable manufacturing unit was set-up in Dadra, adding breadth to STL’s growing portfolio. The unit remains one of India’s most advanced speciality cable manufacturing facilities, to this day.

  5. 2012

    Making Inroads Globally

    Expanding our global footprint, STL’s first overseas manufacturing unit was set up in Haimen City, China. The greenfield facility was a result of a joint venture between STL and Jiangsu Tongguang Communication Co. Ltd. (TGCl), to fulfil China’s 100 million fkm annual demand for optical fibre.

  6. 2013

    Next Destination, Brazil

    Furthering our global strategy of building complementary partnerships in key geographical locations, STL formed a joint venture with Conduspar Condutores Eletricos Ltda. to establish a second overseas manufacturing unit in Curitiba, Brazil.

  7. randeep-sekhon-airtel


    Becoming An End-to-End Solutions Provider

    With the acquisition of Elitecore Technologies, STL’s goal was to diversify beyond the infrastructure vertical, and provide end-to-end solutions to its Telco partners. This allowed STL to offer industry leading software solutions for operations support, business support, and revenue management.

  8. 2017

    Building a Future-ready STL

    At STL, Innovation is in our DNA. To research and build accessible network technologies of the future, STL set up ‘Centre for Smarter Networks’ at Gurgaon, India. The centre is a part of STL’s growing list of innovation centres, which have collectively contributed to 376 patents over the years.

  9. 2018

    Italy Comes Calling

    In line with STL’s identity as an end-to-end global technology leader and integrator of digital networks, STL acquired Metallurgica Bresciana - an Italian specialised optical cable manufacturer. The move greatly augmented our access to strategic European markets and opened new pathways for STL.

  10. randeep-sekhon-airtel


    Made in India, for the World

    With a vision to make India the digital capital of the world, STL undertook various strategic initiatives in 2019:

    Building one of the world’s largest greenfield semiconductor-grade optical fibre preform plants - Gauav, in Aurangabad, India.
    Acquisition of UK-based Impact Data Solutions (IDS) to strengthen our design and deployment offerings for hyper scale data centres
    Strategic partnerships with various entities like TIP, ONAP, O-RAN, and ONF to create higher-speed, lower cost, more secure, programmable, and more reliable networks for the future.

  11. 2020

    Converging Networks for the Market

    STL made yet another strategic investment in ASOCS - a developer of open, disruptive, and virtualized Radio Access Network (vRAN) solutions, delivering 4G and 5G for cellular networks. This allows STL to offer end-to-end capabilities for a converged network, i.e. both wireless and wireline, and deliver full-stack solutions to enterprise and telco customers.

  12. 2021

    New OFC plant

    Expanded capacity for Optical Fibre Cable in Aurangabad

  13. USA-plant-image


    First plant in US

    STL established its first U.S. cable manufacturing plant in Kershaw County, South Carolina. The plant is strategically located closer to the customers in the region for speedier delivery.

Products & Solutions

enabling a digital-first future

STL’s high quality Optotec devices, in the domain of Exchanges, OSPs, Distribution & Access products, and Customer Premises products, enable faster and reliable connectivity.

Estelan is a complete portfolio of enterprise networking structured cabling solutions that includes single mode and OM3 fibre, shielded and unshielded copper cables (CAT6, CAT6A), patch cords and other components and accessories.

Your Virtual Marketplace for Cutting-Edge Optical Networking Solutions!

In this era of digitization, data has the power to change the world.

Celesta – Intelligently Bonded Ribbon Cable

World’s first G.657.A2 macro bend-insensitive optical fibre, compatible with legacy networks.

Industry’s first end-to-end solution for critical infrastructure security.

STL GARV is a multi-functional and easy-to-use digital access point that is designed for enabling rural citizens to benefit from the internet.

Neox is a product of STL specializing in Billing and Revenue Management, Wi-Fi & Packet Core Solutions – AAA, PCRF, DSC.


Success Stories

enabling a digital-first future

Years of Relationships

that define the STL family


that give a glimpse into STL’s future

Learn More About Years

of digital networks
Press Releases

Customer Testimonials

highlighting our quality and commitment

I can validate that STL is a thought leader in optical business and its strategy of virtualised radio and FTTX is in the right direction.

Randeep Sekhon,


Now we are fully convinced to partner with STL because of your technical skill set, installing capabilities and production strength. We wish to do more work with STL in the future.


Group VP, Supply Chain
French Carrier

We are ready to make a joint venture with STL as an exclusive partner for network build for the next 10 years.


British Telco

STL has been our partner since inception. As we enhance our value proposition for our customers, STL as our network partner is enabling the reach of our digital sol. to the last mile.

Anuj Jain,

President Network & Fibre

We have been working with STL for the last 5 years and we have grown a tremendous business together. The partnership has worked out amazing for us.

Susanne Stengade


I can't explain how impressed we were by STL. It is good to know that the investment we are making is going to be sustainable for the long term.

Ewald van der Westhuizen,

Regional Director

We can really witness how evolved STL is from the glass to the actual implementation and application of the networks and products in the networks. I haven’t witness this ever in my life before.

Hendrik Wilkens,

Head Product Mgmt.

The Fibre tech, deep vertical integration, and interesting product line create an opportunity for partnering in the future.

Stefan Spaelter,

VP Sol. PLM.

It is really exciting to see the growth in 5G. There is a shift that is required towards bringing the adoption of wireless connectivity and I congratulate the entire STL team for being the growth-driver of this industry.

RS Sharma,


5G Edge Mantra is a very innovative product because it brings together backhaul and front end connectivity. I hope that STL gets a good market for it and we are proud that an Indian company is doing it.

Anshu Prakash,


STL has transformed itself, you have been producing stuff in India, you are major exporter of stuff that is made in India. You have innovated on your core and transformed into being an integrator of sorts.

Rajan Mathews,

Former DG

STL has done a very professional job with the NCN project. We are really happy to partner with STL. STL's tech which is the best we could have ever got.”

Subashish Gantayet,

Indian Navy

We know STL as a pioneer in optical Fibre but what I found interesting is that they have moved up the value chain of connectivity with solutions at both application and access level.

Arun Valluri,

Wing Commander
Indian Air Force

The company has come a long way from a product company to an integrated networks solutions provider.

Tejas Mehta,

Investment Analyst
Old Bridge Capital

Wishing the management the very best in achieving their targets and creating shareholder value

Parin Gala,


STL's programmable network function suite across wired-wireless network deployments running on top of VMware Telco Cloud, keeps us in an advantageous position to support our mutual customers.

Gabriele Di Piazza,

VP, Solutions & Marketing

STL is sitting on a sweet spot (a non-chinese digital network builder), where if STL takes right actions, it can grow 10x.

Global TMT,

Bain Consulting

STL technology develops and delivers optical communication products, and network and system integration services



We are thrilled to partner with STL, their staunch focus on technology and strong customer relationships will go a long way in delivering flexible and innovative solutions to customers.

Gilad Garon,


In the coming years I see lot of the India companies playing a role which they would have never played in the past, specifically Infrastructure company like yours.

Rajen Vagadia

VP and President

Join the conversation