Telstra has won a multi-million dollar contract to transform and manage the national network infrastructure of gambling and entertainment company Tabcorp.

The five year deal will see the telco provide a fully managed voice and data network over Telstra's Next IP and Next G wireless networks, including a back up element that switches over to the Next G wireless network should a communications cable be severed.

"This means that if, for example, a backhoe sliced through a telecommunications cable running into one of Tabcorp's 4,000 sites, the affected data traffic would automatically switch over to the Next G wireless network," Telstra said in a media statement, taking a sly shot at the much publicized Optus network outages caused by a rogue Queensland hoe.

According to Telstra the deal will provide Tabcorp with increased network reliability and improved customer service outcomes, and will help provide predictable bottom line costs for Tabcorp's operations.

Faster network speeds and broader coverage offered by the Next G wireless network are also expected to increase productivity and effectiveness of Tabcorp's retail and mobile workforce.