Mobile communication system and mobile phone set having analog/ digital capability

A mobile phone set comprising:

• a base unit and at least one handset, said base unit being for digital radio communication with a fixed transmitting station and for analog radio communication with said handset, said base unit comprising:
• a first receiving section for receiving a first modulated digital wave transmitted from the fixed transmitting station and for converting the first modulated wave to a first modulated digital signal;
• a first demodulating section for demodulating said first modulated signal to create a first demodulated signal;
• a first detecting section for detecting whether or not the first demodulated signal is of a signal to the base unit;
• a first modulating section for modulating said demodulated signal to generate a second modulated analog signal for transmission to the handset;
• a first radio transmitting section for converting the second modulated analog signal to a second modulated analog wave and for transmitting the second modulated analog wave to said handset;
• a second receiving section for receiving a third modulated analog wave transmitted from said handset and for converting the third modulated analog wave to a third modulated analog signal;
• a second demodulating section for demodulating said third modulated signal to create a second demodulated signal;
• a second detecting section for detecting whether or not the second demodulated signal is of a signal of itself;
• a controlling section for instructing radio transmission to said handset after receiving a detection signal from said first detecting section and for instructing radio transmission to said fixed transmitting station after receiving a detecting signal from said second detecting section;
• a second modulating section for modulating the second demodulated signal from said second demodulating section to create a fourth modulated digital signal for transmission to said fixed transmitting station;
• and
• a second radio transmitting section for converting the fourth modulated digital signal to a fourth modulated digital wave and for transmitting the fourth modulated digital wave to said fixed transmitting station.