Agito Networks, a Silicon Valley company that allows companies to lower the cost of voice communications by routing them over WiFi networks instead of using cellular networks, has emerged with $9 million in funding.

Mobile phones used within such networks need to be WiFi enabled, and run with Agito software. Agito’s product also requires companies run an Agito appliance on top of their WiFi network to manage the routing.

Battery Ventures led the investment in the Sunnyvale, Calif. company. Silicon Valley Bank and another unnamed investor participated in the round.

Agito Networks co-founder Tim Olson and Pejman Roshan previously worked at Cisco’s wireless division.