A communication network switch system, comprising: a first phone number database accessed by a cable telephony network service provider; a second phone number database accessed by an internet service provider; a plurality of communication network switch devices conducting audio and/or data communications therebetween through a cable telephony network or an internet, the communication network switch devices switching audio and/or data communications between the cable telephony network or an internet telephony system and a short-range wireless communication network; and a plurality of mobile communication devices each of which including a long-range wireless network system transceiver module, a short-range wireless network system transceiver module and a switch device module. The communication network switch device includes a short-range wireless communication network transceiver module, a cable telephony network transceiver module, an internet telephony system drive module, a first switch module and a second switch module. The first switch module of the communication network switch device stores a communication number of a long-range wireless communication network of the mobile communication device and an assigned phone number of the switch device module in the cable telephony network in the first phone number database. The second switch module of the communication network switch device stores a communication number of a long-range wireless communication network of the mobile communication device and an IP address of the second switch module in the second phone number database.