Cable & Wireless Plc’s Mercury Communications Ltd will invest 300m British pounds over the next five years in data services to turn itself from a voice company with data skills to a voice and data company. The initiative, dubbed DataLink 2000, includes further infrastructure investment, developing Asynchronous Transfer Mode services and launch of DataLink Frame, the UK’s first public Frame Relay service, Mercury said. The company also announced a partnership with Siemens AG’s Siemens Network Systems Ltd, in which the multivendor network services provider will assist Mercury in delivering service to the desktop.