Optus has activated what it claims is the world’s first 4G TDD (time division duplex) carrier aggregation. Optus is the only Australian carrier using the TDD (time division duplex) standard for 4G.

Optus has combined one frequency-division duplex (FDD) and two time-division duplex (TDD) 4G LTE spectrum bands in Newcastle to offer significantly higher-speed mobile data downloads that have so far ...

Optus, in collaboration with Ericsson, has achieved a world-first milestone by successfully testing 180MHz across 2.3GHz and 3.5GHz spectrum aggregation using 5G standalone (SA) carrier aggregation ...

Applying four-component carrier (4CC) aggregation to its 900-MHz, 2.1-GHz, 2.3-GHz, and 3.5-GHz downlink spectrum, the Australian telco managed to record peak throughput of 3.4 Gbps using 220 MHz of ...