Traditional nanosatellite communication links rely on infrequent ground-station access windows. While this is well suited to both payload data and detailed scheduling information, it leads to both intermittent and short communication windows, resulting in long periods without contact, thus forgoing the potential for rapid, opportune tasking of satellites. With the recent progress in miniaturisation of technologies for nanosatellites, space missions which were historically only undertaken by larger institutions have become feasible for smaller organisations. However, in many cases the research and operational output of these nanosatellites has not leveraged the full capability of small agile platforms, but has instead remained firmly within the bounds of what is feasible for larger satellite platforms. To bridge this deficit and open up new areas of utilisation for nanosatellites, faster and more flexible communication strategies are required, in order to increase both the timeliness and reliability of message delivery. Existing orbital infrastructure in the form of satellite communication (SATCOM) networks, such as Iridium and Globlastar provide a readily available and cost effective solution to this problem. While these networks have been previously utilised onboard nanosatellites, a full characterisation of their utility in-orbit, and critically, the performance of multiple simultaneous network utilisations is vital to understand the reliability and potential for high-timeliness message delivery. The SpIRIT mission is the first spacecraft mission funded by the Australian Space Agency and is being developed and built by an industry consortium including the University of Melbourne and the Italian Space Agency. SpIRIT is slated for launch in Q4 2022 and will demonstrate a number of novel payloads supporting an Italian Space Agency Gamma Ray detector. The Mercury payload will fly on-board SpIRIT, providing a demonstration and characterisation test bed for the features and capabilities of multiple SATCOM network utilisation in-orbit.