Patent ID: 8718045

Claim:
A location customer premise equipment (CPE), the location CPE in electronic communication with a location telephone, a remote CPE and a remote telephone, wherein the location telephone and the remote telephone communicate via a public switched telephone network (PSTN) and a Voice over internet protocol (VoIP) network, the location CPE comprising: a first storage module; a first processor; and one or more programs stored in the storage module and the programs executed by the first processor, the one or more programs comprising: receiving a switch signal from the location telephone when the location telephone make a VoIP call with the remote telephone; wherein the switch signal represents that the location telephone desires to switch the VoIP call to a PSTN call; sending a corresponding first request signal to the remote CPE; receiving a corresponding first response signal and a phone number of the PSTN network of the remote telephone from the remote CPE; dialing a phone number of the PSTN network of the remote telephone to establish an PSTN network communication link with the remote CPE; and cutting off a VoIP network communication link between the location CPE and the remote CPE.