Quoting United Group, which owns Telemach, Finance reports that it is interested in all companies that may be on sale in Slovenia, ranging from Tusmobil and Debitel to T-2 and small cable operators.
However, it added that it could not add more at this stage as talks are ongoing.
The selling price for Tusmobil is understood to be in the region of €150 million.
Telekom Austria has a presence in Slovenia through a subsidiary named Si.mobil.
Earlier this year it acquired almost half the spectrum on offer in an auction for a fee of €64 million.