Teles. VoIPBOX LCR is a device that can be connected to PSTN, analog PBX extensions and the VoIP network. Allows you to connect your current system to the world of Voice over IP the way it is now, without having to make any changes. VoIPBOX LCR gateway is an analog VoIP gateway with integrated router. Its features ensure full compatibility with any telephone equipment and complete interoperability with any third party VoIP hardware.