A system and method to establish and maintain a connection between devices, which in one example embodiment of a method, may comprise receiving a request to establish a connection between a first communication device and a second communication device. A determination is made as to whether the second communication device is reachable via a data network. Based on the determination that the second communication device is reachable over the data network, a connection between the first communication device and the second communication device is established via the data network. Based on the determination that the second communication device is not reachable over the data network, a connection between the first communication device and the second communication device is established via a telecommunications network. Additional systems and methods are described.