Qualcomm, the 3G chipset company, is the latest company to invest in UK mobile femtocell specialist, ip.access.
The Oyster 3G technology uses a residential broadband connection to deliver a high-quality 3G signal in the home. A number of network operators worldwide are trialling the technology.
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Consumers and businesses use femtocell technology to boost 3G signals in buildings. This improves the quality of voice and data-based mobile signals on shared connections.
The technology is seen as an alternative to Wi-Fi routers.
Qualcomm joins Cisco, Intel Capital, ADC, Motorola Ventures, Scottish Equity Partners, Rothschild Gestion and Amadeus Capital Partners in taking a stake in the firm.
Qualcomm has not disclosed the scale of its investment.