VoWWAN enables you to provide flexible, cost-effective voice services over the WWAN for mobile employees outside the four walls. One-to-one voice calls enables employees outside the enterprise to place a direct call to and receive a direct call from anyone anywhere over public cellular network services. One-to-many voice calls reach entire workgroups instantly via walkie-talkie style communications over public cellular networks, improving overall ability to respond to dynamic business conditions. Telephony over cellular enables the integration of traditional cell phone services into a mobile computing device, providing voice and data communications with a single device.