Stand-alone systems for messaging, communications and collaboration are quickly converging, while at the same time information workers are spending more time away from their offices. Now more than ever, presence is becoming an essential part of the communications infrastructure, giving customers choices and preferences for interacting with their co-workers. With Communicator Mobile, mobile users can set their presence information via their cell phone or engage in IM group chats from their handheld device, all the while controlling how their calls are routed.