AT&T has formally closed on the sale of some 18 Internet Data Centers in the US and another 13 outside of the country to Brookfield Infrastructure for $1.1 billion.

AT&T says the proceeds will be used to pay down debt.

The deal, which closed on Monday, was announced in June 2018.

The two firms also have formed a “strategic alliance” for business going forward.

The data centers will be operated by a Brookfield subsidiary called Evoque Data Center Solutions.

AT&T says its centers support more than 1,000 companies as customers.

Evoque will offer colocation services as well through more than 350 other AT&T data centers.