The JP2043 Phase 3A project provides for the procurement of a Modernised High Frequency (HF) Communications System for Defence long-range communications. The Fixed Network component comprises four HF stations in the Riverina, Townsville, Darwin and North West Cape areas together with primary and backup Network Management Facilities in Canberra. The project will also provide upgrades to selected Australian Defence Force (ADF) sea, land and air mobile platforms to make them compatible with the capabilities of the modernised network.

The Fixed Network capability has been provided in two major stages, Core and Final. The Core System replaced the prior Navy and Air Force HF systems from November 2004 with the Final System taking over support to ADF operations since April 2010. Mobiles upgrade and signal improvement (high frequency direction finding (HFDF)) packages of work are on-going.