Toolondoo will be part of the black site rollout, alongside sites on the Calder Highway in Berriwillock and Toolleen, east of Bendigo.

The Victorian government provided funding to the new sites as part of a $58 million funding commitment to the Mobile Black Spot program.

Optus vice-president of Regulatory and Public Affairs Andrew Sheridan said the three new towers bring the total number of mobile black spot sites switched on in Victoria by the company to 17.

"As part of Optus' vision of being Australia's most loved everyday brand with lasting customer relationships, our network is at the core of everything we do. No matter where our customers live, work, or visit in Australia, we are committed to giving our customers access to reliable mobile coverage and high-quality internet," he said.

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"The investment in expanding Optus' telecommunications infrastructure and mobile coverage is supported by the Federal Government's Mobile Black Spot Program, and we recognise the work of the Federal and State Governments, local businesses and communities for their support for this Program."

Victorian Minister for Innovation, Medical Research, and the Digital Economy Jaala Pulford, said the government was fast tracking connectivity to improve connections across the state.

"Good mobile connectivity will be a game changer for these communities - helping people work, study, connect with loved ones and get access to safety and emergency information," she said.

Optus Territory General Manager for Victoria Jayson Grool highlighted the importance of strength and breadth of telecommunications services in the region.

"The new towers in Berriwillock, Toolleen, and Toolondo bring improved mobile connectivity, coverage and capacity to these areas, offering Optus' best network ever to local businesses and residents," he said.

The Mobile Black Spot program is a federal government initiative to extend mobile coverage across regional and remote Australia.

The federal government has committed $380 million to the program, which has been supported by state and local governments.

As part of the program, Optus was awarded 256 sites in regional and remote parts of Australia.

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