A system and method of communication, comprising establishing a first connection between the user equipment and a first non-public packet switched network which assigns a first non-public packet switched network address to user equipment; establishing an open signaling channel which communicates between the user equipment and a remote server through a cellular telephone network according to a public switched telephone network address associated with an International mobile subscriber identity; communicating an identification of the first non-public network and the first non-public packet switched network address over the open signaling channel to the remote server; and establishing a real time voice communication from the remote server to the user equipment through the first connection based on a call routed through the remote server to the public switched telephone network address.