Brazilian telecoms operator Telemar Norte Leste (Oi) has signed a EUR1.1 billion (USD1.55 billion) five-year contract with Nokia Siemens Networks (NSN), the vendor announced in a statement. Under the deal, NSN, a joint venture between Finnish handset manufacturer Nokia and German equipment supplier Siemens, will be the sole provider of operations and maintenance for all of Oi’s internal plant operations across 17 Brazilian states.