Conterra Ultra Broadband Holdings, Inc., which provides fiber-optic network services, said it has signed an agreement to acquire a pair of regional fiber-optic network companies, Network USA, LLC and Sun America, LLC (combined, NUSA) to expand Conterra's fiber footprint. The acquisition of Louisiana-based NUSA will broaden Conterra's footprint by almost 3,000 miles in Louisiana and Texas, two of its largest operating states, says the company.