Tata Communications Limited
FormerlyVidesh Sanchar Nigam Limited (VSNL)
TypePrivate Entity
Founded1986; 36 years ago (1986)
FounderGovernment of India
HeadquartersMumbai, Maharashtra, India
Area served
Key people
Amur Swaminathan Lakshminarayanan (CEO & Managing Director)
  • Network Services
  • Network Security
  • Internet Services
  • Data Center Services
  • Mobile Communications Services
  • Cloud Telephony
  • Cloud Networking
RevenueIncrease17,100 crore (US$2.2 billion) (2021)
Increase4,123 crore (US$540 million) (2021)
Increase1,251 crore (US$160 million) (2021)
Total assetsIncrease21,306 crore (US$2.8 billion) (2021)
Number of employees
12,000+ (2020)

Tata Communications Limited is an Indian telecommunications company previously known as Videsh Sanchar Nigam Limited (VSNL). It was previously a government- owned-telecommunications service provider and under the ownership of Department of Telecommunications, Ministry of Communications, Government of India. It was sold by Department of Telecommunications, Ministry of Communications, Government of India to Tata Group when Atal Bihari Vajpayee-Bharatiya Janta Party-National Democratic Alliance was in power. Presently the company is part of the Tata Group.[1]

Tata's communications network spans more than 500,000 kilometres (310,000 mi) of subsea fibre and more than 210,000 kilometres (130,000 mi) of terrestrial fibre. The company has invested $1.19 billion in its global subsea fibre network.[2] It provides network services and software-defined network platforms, such as Ethernet, SD-WAN, content delivery networks (CDNs), the internet, Multiprotocol Label Switching (MPLS), and private lines. It has more than 400 points of presence (PoPs) with a data centre, Cloud (Private Cloud and Puiblic Cloud Management) and co-location in 44 sites.[3]

It is listed on the Bombay Stock Exchange and the National Stock Exchange of India. It also holds a stake on its Sri Lankan subsidiaries, Tata Communications Lanka.

The company is listed as one of AON Hewitt's Best Employers in India for 2017.[4]


The business was founded as Videsh Sanchar Nigam Limited (VSNL) in 1986. VSNL is credited to have brought the internet into the country.[5] After the Government of India launched Disinvestment of Public Sector Units in India, The international arm of VSNL (VSNL International) was launched in 2004. VSNL was completely acquired by the Tata Group and renamed as Tata Communications on 13 February 2008.

Tata communications global network

In 2009, Tata Communications and Tyco Telecommunications completed the TGN-Intra Asia cable system.

In 2012, the company completed its network across Egypt linking Europe to India. It created a subsea fibre network that circumnavigates the world. The 9,280-kilometre (5,770 mi) Eurasian section of the Tata Global Network runs across the Mediterranean Sea and the Middle East, connecting Mumbai with Marseilles. Also providing a low-latency connection with a round-trip delay of 92 ms, and speeds of between 2 Mbit/s and 10 Gbit/s.[6]

The company has more than 15 terabits per second of international bandwidth lit capacity.[7]

In January 2016, Windstream Communications announced it was extending its 100 Gigabit Ethernet (100G) network from New Jersey data center operator NJFX's presence at Tata's Cable Landing Station (CLS) in Wall Township, New Jersey, to Ashburn, Virginia's internet hub.[8]


Network and connectivity services


Tata Communications offers Ethernet services that can connect its customers in global offices at speeds of up to 10 Gbit/s in point-to-point or multipoint configurations.[9]

Its Global Network provides flexible bandwidth options from 2 MB up to 10,000 MB using Fast-E, Gig-E, and 10 Gig-E. Its Ethernet services include: Global Dedicated Ethernet, External Ethernet Network-to-Network Interface, Low Latency Ethernet and Ethernet Over MPLS.[9]

Ethernet over MPLS is a high-performance, global MPLS backbone that streams audio video, live broadcasts, and IP services with the scalability and security of a private network.[9]

Its Ethernet services are certified by the MEF—a worldwide non-profit organization dedicated to improving carrier-class Ethernet products and services.[9]

International Private Line

Tata Communications International Private Line offers customers a variety of routing, uptime, and service options for global communications. It delivers voice, video and data connectivity. It is built on its subsea cable network, including a fibre-optic ring, and more than 20 consortium cables covering 300,000 km (190,000 mi) over 200 countries and territories.[10]

Content Delivery Network

In February 2011, as part of a strategy to enhance its global content delivery network (CDN), Tata Communications acquired BitGravity, a US-based CDN provider.[11] This acquisition enabled it to offer its customers a cloud-based service for content delivery, including the delivery of HTML, CSS, JavaScript, videos and live streaming HD.[12] This service was then integrated with other support services, like security, satellite teleports, fibre-based video network and transcoding.[12]

Data Centres

Tata Communications has a data centre network located in 44 locations worldwide.[13] Tata Communications data centres meet international standards for redundancy, and are integrated directly with its global IP network. Its collocation services provide regulated power, cooling and physical security for the server, storage and networking equipment.[13] In May 2016, in order to redeploy capital in other areas of its business, Tata Communications sold a 74% stake in its data centre business to Singapore Technologies Telemedia. Tata communications has more than 10,000 racks and 93,000 square metres (1,000,000 square feet) of Data center space.

Unified Communications and Collaboration

Tata Communications delivers a portfolio of Unified Communication and Collaboration (UCC) solutions[buzzword] worldwide. These services include: Global SIP Connect, Unified Conferencing, Unified Communications as a Service (UCaaS) and Hosted contact centre.[14]

Global SIP Connect

On 18 January 2016, Tata Communications launched a white-label Unified Communications solution[buzzword] called Global SIP Connect.[15] This solution[buzzword] was designed to address the voice requirements of its enterprise customers, while simultaneously expanding its Unified Communications portfolio. The SIP Trunking solution[buzzword] enables its service provider customers to consolidate and manage voice services, while providing all global on-net and off-net voice services to link their businesses globally.[15]

Unified Communications as a Service (UCaaS)

Tata Communications Unified Communications as a Service (UCaaS) integrates and works with other service provider solutions[buzzword] including Microsoft and Cisco.[16] Its global UC services on the Microsoft Skype for Business platform provide a solution[buzzword] including conferencing, online meetings, instant messaging, voice and video.[16]

Hosted Contact Centre Services (CCaaS)

Tata Communications InstaCC was launched at Enterprise Connect 2015 in Orlando on 16 March 2015. This initial offering has been supplemented with Amazon Connect and Cisco Webex Contact Centre. Hosted contact centre solutions[buzzword] include support for outbound and omni-channel communications, enabling enterprise customers to quickly establish contact centres and call centres.[17]

Cloud Services

In October 2014, Tata Communications launched its IZO platform, “a global platform for enhanced hybrid multi cloud enablement”.[18] Tata Communications IZO Cloud Platform brings together 20+ cloud providers, three large hyperscale cloud platforms and 43+ data centres, that its customers can interconnect with.[18]

IZO Cloud Platform and Services

Under the IZO Cloud and Managed Hosting Services portfolio, Tata Communications provides various cloud and hosting solutions like Private Cloud (IZO Private Cloud), Container Services (IZO Cloud Containers), Managed Kubernetes, Cloud Storage (IZO Cloud Storage), Big Data/Analytics Platform (IZO Cloud Analytics Platform) and Public Cloud Assessment, Migration and Management under the IZO Managed Cloud for AWS, AZURE, GCP. Tata Communications also offers SAP HANA Hosting on Any cloud platforms(Private or Public), VDI solutions on Any Cloud, Govt. Community Cloud (GCC) and in July 2021, the organisation launched its latest product IZO Financial Cloud - a purpose built community Cloud platform for Financial Industry, apart from this, the organisation offers Managed Hosting Services etc. Tata Communications also offers Colocation services in the international market. Read More: https://www.tatacommunications.com/solutions/cloud

IZO Internet WAN

Tata Communications IZO Internet WAN is a global-internet-based WAN service. This service can be integrated with Tata Communications Global VPN solution[buzzword] to build a global hybrid network.[19] IZO Internet WAN reaches 42 countries, 700+ cities, over 1 million buildings and covers 85% of the world's GDP.[19]

IZO Private Connect

IZO Private Connect links businesses to leading cloud service providers including Amazon Web Services, Microsoft Azure, Google, Office 365 and Salesforce.com.[20] Its customers can connect using MPLS or Ethernet and gain access to Ethernet connectivity to Tata Communications’ data centres and across 85 third party data centres globally.[20] In addition to global connections, IZO Private Connect is available in 6 data centres in India. IZO Private Connect is now expanding to include internet direct connectivity in addition to MPLS and Ethernet. Connection speeds are available from 2 MB to 10 GB.

IZO Public Connect

IZO Public Connect is a cloud enablement service that provides a route for Tata Communications’ enterprise customers by tagging their data packets for pre-determined delivery over the public internet.[20]


In November 2016, Tata Communications launched its new addition to the IZO platform, IZO SDWAN.[21] The solution[buzzword], delivered as a managed service, combines IZO WAN with software-defined and virtualised network technologies in 130+ countries.[21] IZO SDWAN cloud service gateways are built next to cloud service providers in 20 locations across the globe.[21]

Media Services

Tata Communications provides a range of services and solutions[buzzword] for enterprises in all segments of media and entertainment, including gaming, hospitality, sports, leisure, education, news, music, cable and broadcasting.

In April 2015, Tata Communications launched its "Media Ecosystem".[22] The ecosystem combines traditional video contribution services with IP-connectivity. Services include: asset management, workflow management, channel origination, internet contribution feeds, OTT platform and transcoding as a service.[23]

Security and Fraud Prevention

Managed Security

Tata Communications offers a complete array of managed security services, that provides enterprise customers with 24x7x365 protection from attacks.[24] Its managed security offering includes firewalls, threat management, intrusion detection and prevention, DDoS detection and mitigation, email security, vulnerability testing and management.[24]

Fraud Prevention

Tata Communications offers a fraud prevention toolkit to identify and proactively prevent fraudulent call activity.[25] The toolkit uses technologies including big data, analytics, machine learning, crowd sourcing, real-time monitoring, subscriber alerts and automated reporting.[25]

The toolkit monitors 30 million calls per day for fraud, and blocks over 400,000 fraudulent calls every day.[25] When the fraud fighting toolkit identifies a fraudulent call, Tata Communications blocks the number across its entire network.[25]

Mobility Services

Mobile Roaming

Tata Communications combined its Diameter Signalling exchange (DSX) platform with its IPX Connect service to offer its customers 3G/4G roaming.[26] It provides a solution for LTE roaming migration, supporting 2G, 3G and 4G roaming within one framework.[26] This framework addresses signalling, routing, inter-working, transport, clearing, settlement, business intelligence, security and service assurance.[26]


With an on-net signalling network, directly connecting 300 mobile network operators and with reach to 800+ mobile network operators, Tata Communication's interconnects mobile ecosystem organisations for messaging and roaming.[27]

Its signalling services can be delivered over a number of network options including TDM, IP, Global VPN and IPX Connect (SCCP over IPX). Also supported is signalling evolution from SCCP to Diameter, supporting IMS and LTE roaming capabilities.[27]

Mobile Messaging

Tata Communications mobile messaging platform provides an A2P SMS hub environment. The Mobile Messaging Exchange provides a connection between mobile messaging originators and mobile network operators.[28] Tata Communications partners with Anam for SMS firewall services, designed to provide reliable and secure SMS delivery for Tata Communications' customers.[28]

Internet of Things

Tata Communications MOVE is an IoT Connectivity Management Platform, providing global mobile connectivity for a range of connected devices, from cars to consumer electronics. The platform leverages Tata Communications’ global mobile network operator relationships to offer a technology neutral approach that supports cellular connected device connections around the world. Tata Communications also manages a LP-WAN network in India, using LoRa technology to support an array of smart city, smart manufacturing, Smart Grid, Smart Meter and transportation applications.

Wholesale Voice

Wholesale Voice Transport & Termination

Tata Communications offers international wholesale voice transit and termination services with the support of its global network.. It provides full support for HD Voice, complies with GSMA's IPX specifications for direct transit and is future proof for operators migrating to Voice over LTE.[29]

International Voice Access Services

Tata Communications provides its customers with a full suite of Voice Access Services, that cover 105 countries. Customers can receive toll-free calls from both fixed and mobile phones in more than 90 countries with ITFS.[30] They can provide a single number that is accessible from more than 45 countries worldwide, with UIFN. It also enables customers to purchase local number ranges, through its Bulk Local Number Service offering.[30]


In June 2016, Tata Communications launched its Wi-Fi+, a cloud communications solutions[buzzword] for its mobile network operator customers.[31] Operators are able to provide their customers with unlimited calling, messaging and data over high-quality, secure Wi-Fi.[32] It harnesses Tata Communications’ Cloud RTC expertise and iPass's more than 21 million Wi-Fi hotspots in more than 100 countries.[32]

In January 2017, Tata Communications announced its partnership with Bharat Sanchar Nigam Limited (BSNL) to provide 44 million Wi-Fi hotspots in more than 100 countries,[33] including rail systems and international flights. In October 2021 Tata Communications announced the availability support for WiFi6, in collaboration with its partner Cisco.[34]

Subsidiaries of Tata Communications Ltd

Tata Communications Transformation Services (TCTS), a 100% subsidiary of Tata Communications Ltd, provides business transformation, managed network operations, network outsourcing, and consultancy services to telecommunication companies around the world.

Tata Communications Payment Solutions Limited (TCPSL) formerly known as Tata Communications Banking InfraSolutions, is a wholly owned subsidiary of Tata Communications. TCPSL is one of the fastest growing Payment Solutions specialists in India offering end-to-end B2B and B2C solutions. Being a 100% Banking and Financial Services focused organisation, TCPSL offers one stop payment solutions to all categories of banks including PSU, Private, MNC and Co-operative banks. TCPSL's White Label ATM offering under the brand name Indicash marks its foray in the B2C space. With this it is the first White Label ATM service provider in the country. Under this service offering, TCPSL offers ATM services across the country through Indicash ATM network with special focus on semi urban and rural areas.

Innovation Hub

In September 2019, PGA European Tour and Tata Communications launched the Innovation Hub. This contest that offers the opportunity for start-ups worldwide to convert concepts into reality.[35]


  1. ^ "Tata group financials - Investor desk - Tata group". www.tata.com.
  2. ^ "Network Services - Tata Communications". www.tatacommunications.com.
  3. ^ "About us | Tata Communications". www.tatacommunications.com. Retrieved 23 March 2017.
  4. ^ "AON Best Employers - India".
  5. ^ Block, Daniel. "How Reliance Jio is monopolising the telecom sector". The Caravan. Retrieved 21 May 2019.
  6. ^ Curtis, Sophie. "Tata Communications completes fibre optic 'ring around the world'".
  7. ^ "Key facts | Tata Communications". www.tatacommunications.com. Retrieved 30 March 2017.
  8. ^ "Windstream establishes 100G express route in red-hot Ashburn, Va. market via NJFX". fiercetelecom.com. 19 January 2016. Retrieved 30 January 2016.
  9. ^ a b c d "Ethernet | Tata Communications". www.tatacommunications.com. Retrieved 10 May 2017.
  10. ^ "Private Line | Network Services | Tata Communications". www.tatacommunications.com. Retrieved 10 May 2017.
  11. ^ "Tata Communications completes acquisition of BitGravity - Livemint". www.livemint.com. Retrieved 10 May 2017.
  12. ^ a b Communications, Tata. "Content Delivery Network > Tata Communications". cdn.tatacommunications.com. Retrieved 10 May 2017.
  13. ^ a b Balakrishnan, Reghu (11 February 2016). "ST Telemedia set to buy Tata Communications Data Centre". livemint.com/. Retrieved 10 May 2017.
  14. ^ "Unified communications solutions for service providers | Tata Communications". www.tatacommunications.com. Retrieved 10 May 2017.
  15. ^ a b www.ETCIO.com. "Tata Communications' launches white-label SIP trunking solution to empower service providers to tap UC demand - ET CIO". ETCIO.com. Retrieved 10 May 2017.
  16. ^ a b "Unified Communications as a Service | Tata Communications". www.tatacommunications.com. Retrieved 10 May 2017.
  17. ^ "Tata Communications launches three new UC solutions". www.mis-asia.com. Retrieved 10 May 2017.
  18. ^ a b "Tata Communications launches IZO". Totaltelecom. Retrieved 10 May 2017.
  19. ^ a b "Leading Lights Finalists 2015: Most Innovative Enterprise Service | Light Reading". Light Reading. Retrieved 10 May 2017.
  20. ^ a b c "Tata Communications ushers in new era of Internet to drive hybrid cloud adoption". ITWeb Technology News. Retrieved 10 May 2017.
  21. ^ a b c "Tata Communications launches IZO™ SDWAN to enable organisations to unleash their global growth potential". The Hindu Business Line. 29 November 2016. Retrieved 10 May 2017.
  22. ^ "Tata Communications announces Q4 FY15 and Q1 FY16 results". newswire.telecomramblings.com. Retrieved 10 May 2017.
  23. ^ "Tata Communications launches Media Ecosystem to drive broadcast innovation | Tata Communications". www.tatacommunications.com. Retrieved 10 May 2017.
  24. ^ a b "Tata Communications Helps Customers Proactively Mitigate IT Risk | Qualys, Inc". www.qualys.com. Retrieved 10 May 2017.
  25. ^ a b c d "Fraud Protection Data Sheet" (PDF).
  26. ^ a b c "Roaming | Tata Communications". www.tatacommunications.com. Retrieved 10 May 2017.
  27. ^ a b "Signalling | Tata Communications". www.tatacommunications.com. Retrieved 10 May 2017.
  28. ^ a b "Tata Communications Mobile Messaging Exchange and Anam's SMS firewall supports mobile network operators in the fight against SMS fraud and grey routing". telecomtalk.info. Retrieved 10 May 2017.
  29. ^ "Voice Direct Transit | Tata Communications". www.tatacommunications.com. Retrieved 10 May 2017.
  30. ^ a b "Access Services | Tata Communications". www.tatacommunications.com. Retrieved 10 May 2017.
  31. ^ "Tata Communications targets cloud communications with WiFi+ | commsmea.com". www.commsmea.com. Retrieved 10 May 2017.
  32. ^ a b "Tata Communications' WiFi+ allows telcos to offer unlimited calling, messaging and data to customers". telecomtalk.info. Retrieved 10 May 2017.
  33. ^ www.ETTelecom.com. "BSNL partners Tata Communications to provide 44 mn Wi-Fi hotspots abroad - ET Telecom". ETTelecom.com. Retrieved 10 May 2017.
  34. ^ "Tata Communications and Cisco Systems expand global strategic partnership". Tata Communications. Retrieved 4 October 2021.
  35. ^ "European Tour And Tata Communications Launch Innovation Hub". Forbes. 25 September 2019.
  36. ^ "Innovation award for alugha". European Tour. 29 April 2020.