Windsor's gain appears to be LaSalle's loss in revenue.
The Amherstburg Police Services Board has approved a five-year contract for Windsor to handle its dispatch services at a cost of around $650,000.
LaSalle police handled calls at a cost of $1.4 million.
Lasalle's mayor says his town will have to look for more efficiencies, or raise taxes one per cent to make up for the $300,000 loss in revenue when the current contract expires at the end of the year.