Kumu Networks, a US-based wireless networks communications technology, has raised $25m in its series C round from strategic investors including Cisco Systems, Verizon Communications, Deutsche Telekom and Swisscom. Existing investors, venture capital firms NEA, Third Point Ventures and Khosla, are also reinvesting in the C round.
Its November 2013 round raised $15.2m, according to a regulatory filing, a year after it had closed towards a $5m round.
Kumu was founded in 2012 by a team of Stanford University professors and PhD graduates to commercialise research on wireless full duplex, which allows a radio to simultaneously transmit and receive overlapping signals using a single frequency channel without interference.
Its angel investors and advisers include Stanford University professors Philip Levis, Sachin Katti, Nick McKeown and Bernd Girod.