As a strata issue, this could be treated as a capital works upgrade of the facilities of the body corporate, like as if the body corporate were to replace the driveway to all Units. As such the normal laws apply, and probably requires the owners to approve the expense at a general meeting. (It would in NSW – I’m guessing it’s the same in Victoria). It would be paid from the sinking/capital works fund, and a special levy might be needed if the body corporate doesn’t have sufficient for that. If you don’t want this upgrade to go ahead, start lobbying your neighbours. Although consider that this upgrade will add to the value of your property (ie, tenants will want good internet access or the resale value of your Unit would be better with this too.)