i2i

Overview

i2i is a two-landing submarine cable system connecting Chennai on India's southeastern coast with Tuas on Singapore's western shoreline. Placed into service in 2002, it spans a corridor that sits at the intersection of South Asian and Southeast Asian connectivity, threading traffic between the Indian subcontinent and one of the world's most significant internet exchange and data centre hubs.

Route and Landing Points

The system's two termini reflect a straightforward but strategically important geometry. Chennai has long served as India's primary gateway for cables entering from the east, given its position on the Bay of Bengal and its established terrestrial network links into the subcontinent's interior. Tuas, on Singapore's western coast, is a well-established cable landing zone that feeds into Singapore's dense onward connectivity to Australia, Japan, Europe and beyond. Traffic landing at either end has access to substantially broader regional and intercontinental paths.

Ownership and Capacity

Bharti Airtel, one of India's largest telecommunications operators, holds ownership of the i2i system. The cable's design capacity stands at 8.4 Tbit/s, a figure that reflects engineering decisions made at the time of its commissioning. Technology upgrades to subsea systems can extend usable capacity well beyond original design parameters, though the extent of any such upgrades to i2i is not documented here.

The length of the system has not been publicly documented in available records.

Regional Significance

The India–Singapore lane is among the more heavily trafficked bilateral routes in Asia, supporting enterprise connectivity, cloud traffic and consumer internet demand moving between the two countries and their broader hinterlands. For Bharti Airtel, ownership of a dedicated cable on this route provides a measure of capacity security and network control that leased capacity on third-party systems cannot fully replicate. i2i occupies a defined place in the layered mesh of cables that collectively underpin connectivity across the Indian Ocean and western Pacific rim.