Vanu has raised $32 million for its business of making equipment for cell phone infrastructure, PEHub reported.

The Cambridge, Mass.-based maker of software radios and base stations for cellular operators raised the money from Norwest Venture Partners and Tata Capital of India. They were joined by return backer Charles River Ventures, which led a $9 million first round for Vanu a year ago.

Vanu's Andy Beard, chief strategy officer for Vanu, said the company raised the money for working capital to expand in the U.S. and in India. The company's software radio is based on flexibile silicon chips that allow a number of different voice protocols to be used with the same equipment.