Male is presenting at a podium with Satellite dishes in the background.

Press Release: ST Engineering iDirect, Hellas Sat validate hybrid 5G


Press Release hub banner blue with title in red white and blueST Engineering iDirect, a global leader in satellite communications, and Athens-based satellite operator Hellas Sat, have successfully validated hybrid 5G backhauling use cases over satellite.

Showcasing a completely seamless transition between terrestrial and satellite-based networks, the demonstration not only confirms the critical role that satellite will play in the 5G ecosystem through its capability to broaden coverage to hard-to-reach areas, but further reinforces its cellular backhaul capabilities across Hellas Sat’s satellite coverage.

The demonstration was organized in partnership with Korean satellite operator KT-SAT, with Thales Alenia Space and Vodafone Greece which held the first 5G satellite backhauling demonstration in February 2021. It showcased how satellite can enable increased coverage in areas where traditional backhauling technologies are either unsuitable or not cost-effective.

ST Engineering iDirect’s Evolution® hub and modem equipment supported the transmission on the Hellas Sat 3 satellite and Vodafone Greece’s 5G spectrum in the 2100 MHz and 3600 MHz frequency zones. KT-SAT also provided its world’s-first hybrid router for satellite-terrestrial 5G transmission. 5G terminals were connected to the router to simultaneously transmit and receive various types of data, or utilized separate routes to and from a 5G network and a satellite. The terminals successfully maintained normal service operations with the Hellas Sat 3 satellite connectivity, even after the 5G network was intentionally disconnected.

“After two decades of operations, we are excited to be exploring this new dawn in connectivity,” said Christodoulos Protopapas, CEO of Hellas Sat. “It is so encouraging to see our partners engaging in such an important Proof of Concept to enable people to witness the benefits that satellite-based technology can offer. This ability to seamlessly transition assures connectivity in the most remote areas for communities, businesses and transport and also vital communications such as disaster recovery.”

“This demonstration is another step towards the commercialization of 5G backhaul over satellite services,” said Semir Hassanaly, Head of Cellular Backhaul and Trunking at ST Engineering iDirect. “It shines a light on the critical role that satellite is going to play in the future of connectivity. As 5G becomes more prevalent, it’s essential that remote communities, moving vehicles and other users of 5G connectivity, are connected ubiquitously and continuously. We are immensely proud to be involved in this demonstration and thank Hellas Sat for this opportunity to showcase the capabilities of hybrid satellite and terrestrial connectivity with these other pioneering companies.”


ST Engineering North America is the U.S. headquarters of ST Engineering, a global technology, defense and engineering group with a diverse portfolio of businesses across the aerospace, smart city, defense and public security segments. Based in Alexandria, VA, it has major operations across 16 cities in 12 states and employs about 5,000 people providing innovative products and solutions to commercial and government customers across diverse market segments.

ST Engineering iDirect, a subsidiary of ST Engineering North America, is a global leader in satellite communications (satcom) providing technology and solutions that enable its customers to expand their business, differentiate their services and optimize their satcom networks. Through the merger with Newtec, a recognized industry pioneer, the combined business unites over 35 years of innovation focused on solving satellite’s most critical economic and technology challenges and expands a shared commitment to shaping the future of how the world connects. The product portfolio, branded under the names iDirect and Newtec, represents the highest standards in performance, efficiency and reliability, making it possible for its customers to deliver the best satcom connectivity experience anywhere in the world. ST Engineering iDirect is the world’s largest TDMA enterprise VSAT manufacturer and is the leader in key industries including broadcast, mobility and military/government. In 2007, iDirect Government was formed to better serve the U.S. government and defense communities. For more information on our platforms please visit

Featured image credited to Hellas SAT