The contract from the Australian Department of Defense, worth nearly $900 million, is for 6 1/2 years and includes integrating fixed telecommunications with satellite and tactical networks.
"This partnership will deliver Defense with robust and secure information communications technology, while creating greater efficiencies and lower costs," said Defense Chief Information Officer Peter Lawrence. "The project includes a major transformation program of work and the ongoing sustainment of Defense's telecommunications environment."
The Defense telecommunications network includes networks at 430 sites in Australia and supports about 100,000 domestically and overseas.
"Telstra's aim is to deliver technology that can become the backbone of Australian Defense for the next decade and beyond," said Telstra Chief Executive Officer David Thodey.
"The use of technology such as unified communications, advanced video conferencing as well as tablet and smartphone usage, will provide a vital link connecting troops, commanders, bases and allies around the world."