Openreach will continue to work alongside Crimestoppers to combat copper cable theft - a common cause of broadband outages across the UK.
Since 2011, BT's infrastructure division has worked in partnership with the independent crime-fighting charity to tackle network vandalism and cable theft.
Rewards of up to £1,000 are offered to members of the public who provide information which leads to arrests and subsequent convictions.
The partnership has been extended for at least another year, as part of Openreach efforts to defend BT's network assets and keep broadband customers online.
Bernie Auguste, Head of Security at Openreach, said the company "remains committed" to tackling the scourge of cable theft and network damage, which impacts on both its customers and business.
"Our relationship with Crimestoppers is one of the many key elements in our strategy for addressing the problem," he stated.
"The involvement of the public has and continues to provide valuable information in identifying those who perpetrate these acts so that we can bring them to justice."