The INDIGO cable system is formerly named as APX-West.

In April 2017, AARNet, Google, Indosat Ooredoo, Singtel, SubPartners, and Telstra announced they have entered into an agreement with Alcatel Submarine Networks (ASN) to build the INDIGO cable system that will connect Singapore, Indonesia and Australia.

The INDIGO cable system spans 9200km, consists of two distinct cable projects, Indigo West of 4600km connecting Singapore to Perth via Jakarta, and Indigo Central of 4600km connecting Perth to Sydney.

The INDIGO cable system is designed with two fiber pairs, with a design capacity of around 36 Tbps and option to expand in the future. INDIGO cable system features new spectrum-sharing technology, each consortium member can deploy its own SLTE, upgrade their networks and enable capacity increases on demand independently.

In Australia, the INDIGO WEST lands at Floreat Beach in Perth, and the INDIGO Central lands at Coogee Beach in Sydney. The terminal equipment of INDIGO cable system is hosted at NextDC's P1, P2, S1, and S2 datacentres across Perth and Sydney.

The INDIGO cable system has been ready for service since the end of May 2019.