Patent ID: 8537809

Claim:
A separation device, comprising: a line interface, adapted to provide an interface for connecting to a telecommunication access system which provides public switched telephone network (PSTN) and data services; a data interface, adapted to provide an interface connected with customer premises equipment (CPE) and adapted to connected with the line interface; a first communication interface, adapted to provide an interface connected with a PSTN communication terminal; a second communication interface, adapted to provide an interface connected with a foreign exchange station (FXS) interface of the CPE; and a connection switching unit, adapted to connect the first communication interface with the line interface or to connect the first communication interface with the second communication interface, and to perform switching between the two connections so as to implement PSTN communication or Internet-based voice over IP (VoIP) communication respectively; wherein the connection switching unit comprises: a loop connection module, adapted to connect the line interface with the first communication interface or to connect the second communication interface with the first communication interface; a switching module, adapted to switch the loop connection module to the connection between the line interface and the first communication interface when dial-out communication type is the PSTN communication, and to switch the loop connection module to the connection between the first communication interface and the second communication interface when the dial-out communication type is the VoIP communication; and a control switching module, adapted to detect a connection condition switched by the switching module and a dial-in state, to switch the loop connection module to the connection between the line interface and the first communication interface when there is no dialing-out communication and the dial-in state is the PSTN communication, and to switch the loop connection module to the connection between the first communication interface and the second communication interface when there is no dialing-out communication and the dial-in state is the VoIP communication.