Method and apparatus for providing a private communication system in a public switched telephone network

One of users member is switched common telephone network end of the communication a private network. Member each user for by a data wire of wireless PSTN (10) improved (48), or by using a wireless communication system (14) and mobile phone of PSTN with improved (22). A private network comprises a telephone the network interface (92) and call managing (40), which is provided with more than PSTN (20) telephone line (44) comprises a telephone. A telephone line (44) comprises a related with multiple users member. The network call managing (40) further - comprising and a network interface coupling's switch array (110), for the operation member user from the intelligent signal receiving according to provide the non-work member user in a telephone line for selecting.