Automatic-switchable network extension apparatus and a switching method

An automatically-switchable network extension apparatus, comprising:

• an automatic switching unit, used to generate a configuration, which is a value generated by a random number generator, to execute an automatic connecting process, and to set the automatically-switchable network extension apparatus to be a CO (Center Office) operational mode or a CPE (Customers Premises Equipment) operational mode according to the configuration;
• a communication-port connecting unit, including a plurality of communication ports, used to connect with other network extension apparatus and a network;
• an integrated signal-processing unit, electrically connected to the automatic switching unit and the communication-port connecting unit, used to process signals in the automatically-switchable network extension apparatus and to process signals with the other network extension apparatus with the CO operational mode or the CPE operational mode according to setting by the automatic switching unit;
• a communication-port controller, electrically connected with the integrated signal-processing unit and the automatic switching unit, used to detect the other network extension apparatus is to be the CO operational mode or the CPE operational mode.