Corps of Signals: The silent backbone of national security
As warfare expands beyond land, sea and air into cyberspace and outer space, the Corps of Signals has emerged as a key enabler of India’s military space capabilities
As the Indian Army’s Corps of Signals marks its 116th Raising Day on February 15, it is an appropriate moment to draw public attention to a formation whose influence on India’s national security has been decisive, yet largely unseen. In an era when wars are increasingly shaped by information dominance, secure networks, cyber operations and space-enabled capabilities, the Corps of Signals stands as the quiet architect of India’s military effectiveness.
Raised in 1911, the Corps of Signals has evolved from an organisation handling telegraph wires and manual exchanges into the backbone of India’s military communications, electronic warfare, cyber operations and space-enabled command-and-control systems. Its journey mirrors the transformation of warfare itself—from physical manoeuvre to multi-domain operations where information is both weapon and shield.
Foundations in secure communication and intelligence
The Corps’ association with intelligence and secure communications dates back to the early 20th century and deepened significantly during World War II, when Signals personnel undertook organised cipher duties and communications intelligence tasks. These early efforts laid the institutional foundations for what would later mature into indigenous signal intelligence and secure military communication practices.
After Independence, at a time when India was consolidating its defence structures with limited resources, the Corps of Signals assumed a central role in sustaining military communications and handling sensitive information securely. Its officers and personnel ensured continuity, technical competence and operational reliability when the nation needed it most.
During the 1960s, the Corps also contributed significantly to India’s emerging defence research ecosystem, lending expertise to early electronic warfare and command-and-control initiatives that later became part of the Defence Research and Development Organisation’s work.
Enabling nation-building through connectivity
The contribution of the Corps of Signals extends beyond the battlefield into the broader project of nation-building. It established critical communication links during major national operations, such as the integration of Hyderabad in 1948 and the liberation of Goa in 1961.
In subsequent decades, Signals units worked in some of the country’s most inhospitable terrains—Jammu and Kashmir, the North-East and high-altitude border regions—laying communication infrastructure that enabled governance, security and development to take root.
Technological foresight has been a hallmark of the Corps. It pioneered the induction of teleprinter networks in the Indian military, significantly improving the speed and reliability of message transmission. This marked a decisive shift from manual signalling to automated systems and prepared the ground for the digital transformation that followed.
Building India’s secure military networks
The 1990s marked a watershed in India’s military communications. The induction of the Army Static Switched Communication Network (ASCON) provided a secure, nationwide backbone for voice and data, dramatically enhancing operational reliability. This was followed by the Army Wide Area Network (AWAN), which enabled secure digital messaging across commands and formations.
In the early 2000s, the Corps introduced closed and exclusive mobile communication systems for military use, addressing the growing need for mobility while preserving security.
By the mid-2000s, it had transitioned to fully Internet Protocol-based secure architectures. Today, the Corps operates a standalone, pan-India secure network that underpins joint and Tri-service operations, a prerequisite for modern integrated warfare.
From cyberspace to outer space
As warfare expands beyond land, sea and air into cyberspace and outer space, the Corps of Signals has emerged as a key enabler of India’s military space capabilities. Secure satellite communications, resilient data dissemination and assured connectivity between space assets and terrestrial networks fall squarely within its professional domain.
Signals personnel are deeply involved in integrating and protecting satellite-based systems that support command and control, intelligence dissemination and operations in remote areas.
Their expertise in encryption, spectrum management and network resilience is central to safeguarding these capabilities against disruption and hostile interference. In effect, the Corps provides the connective tissue that makes space power operationally meaningful.
Innovation at the technological frontier
The Corps of Signals has remained firmly at the cutting edge of military technology. It has fielded one of the earliest large-scale indigenous secure military mobile communication ecosystems, built around end-to-end encryption and sovereign control over hardware and software. This initiative has significantly reduced reliance on commercial platforms for sensitive communication.
At its premier training institution, the Military College of Telecommunication Engineering in Mhow, the Corps is preparing for future warfare through early investments in quantum technologies, artificial intelligence and advanced analytics. These efforts are not experimental indulgences but operationally driven initiatives aimed at enhancing decision-making, network resilience and information superiority.
Dominance in the invisible domains
Modern conflict is increasingly fought in invisible domains—the electromagnetic spectrum, cyberspace and information space. Here, the Corps of Signals plays a decisive role. It enables electronic warfare, signal intelligence and spectrum operations that allow the armed forces to sense, disrupt and protect across contested environments.
Signals units operate and sustain indigenous electronic warfare systems in partnership with India’s defence industry, supporting interception, direction-finding, jamming and protection across the spectrum. These capabilities are vital not only in conventional conflict but also in countering asymmetric threats, such as unmanned aerial systems.
In the cyber domain, Signals personnel form a substantial part of the armed forces’ cyber expertise, contributing to both defensive and offensive capabilities.
Service beyond combat
Beyond warfighting, the Corps of Signals has repeatedly provided critical communication support during natural disasters, humanitarian assistance missions and internal security operations—often restoring connectivity when civilian networks fail. Through these efforts, it has reaffirmed its role as a national asset, not merely a military one.
An enduring, understated legacy
The Corps of Signals’ motto—TeevraChaukas (Swift and Secure)—captures the essence of its mission. For over a century, it has adapted to every technological shift, ensuring that India’s soldiers, commanders and decision-makers remain connected under all conditions.
As India navigates an era shaped by cyber threats, information warfare and the militarisation of space, the Corps of Signals stands as the silent backbone of national security. Its work is rarely visible, its successes often taken for granted, but without it, modern military operations—and secure nation-building—would simply not be possible.
(The writer is a former Signals Officer)
