The reason that the company is giving is the gradual decline in the demand of Fixed-Line components and company’s strategy to focus more on Mobile broadband equipments. Company also recorded unprofitability as another reason which resulted in the closure.
Closure of Kolkata manufacturing center is seen as part of NSN’s earlier announced plan that it will cut off 17,000 staff world-wide as part of a major global restructuring to focus on more profitable operations.
Source – Indiatimes News