ALSO NOTED: Vyke buys Callserve; NSN sales up; and much more...

> U.K.-based Vyke Communications acquires VoIP carrier Callserve Communications. Article

> Nokia Siemens Networks posted sequential sales growth of 25%. Article

> Oger Telecom bids for stake  in South Africa wireline telco Telkom SA. Article

> BT starts new accounting procedures following restructuring. Article

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