| 摘要 |
PURPOSE: To provide lots of instruction receiving devices with one call number at present by using part of a message as a sub address when the portable radio instruction receiving device is used by a group and designating and storing in advance the sub address for each portable radio instruction receiving device. CONSTITUTION: A number (address) 11 allocated from a station to an instruction receiving device and a message 12 used optionally by the user are sent to the portable radio instruction receiving device. Part of the message 12 is used for a sub address 13 and the sub address 13 is stored in a ROM 7 together with the address 11. Then a portable radio instruction receiving device with the same number (address) in the group is contracted with the station and in use. A message part other than the sub address 13 is used as conventionally as the message 14. In this case, a received wave from the antenna 1 is demodulated and decoded and the result is given to a CPU 6, and when the input signal is coincident with the address 11 and the sub address 13 stored in the ROM 7, a speaker 4 is sounded. |
