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(57) The wireless telephone subsystem for combining a summary circuit type telephone machine with public telephone exchange network is indicated. It has the base unit constituted so that it might be combined with two or more circuits of PSTN. A base unit contains the base coda / decoder which changes a digital signal into an analog signal, in order to change into a digital signal the analog signal received from the circuit of PSTN and to combine with the circuit of PSTN conversely. It is combined with base coda / decoder, and a base unit answers the digital signal supplied by this base coda / decoder, By arranging the portion which these digital signals chose into the portion which the multiplex frame chose, the multi-channel transmitter-receiver which transmits these signals is included. Moreover, a base multi-channel transmitter-receiver receives a digital signal, and combines these digital signals with base coda / decoder. It has a program possible change means which associates that as which the circuit of PSTN was chosen, and the portion which the multiplex frame chose. Moreover, this subsystem contains the wireless interface unit linked to a circuit type telephone machine. A wireless interface unit contains the remote coda / decoder for changing other digital signals into an analog signal, in order to change into a digital signal again the analog signal received from the circuit type telephone machine, and in order to combine with a circuit type telephone machine. Moreover, a wireless interface also contains the remote transmitter-receiver combined with remote coda / decoder. A remote transmitter-receiver answers the digital signal from remote coda / decoder, and transmits these signals to the portion which the multiplex frame chose, and receives other digital signals, and combines them with remote coda / decoder.