| 摘要 |
PURPOSE:To allow a caller to recognize the state of a called party by transmitting a reply signal comprised of codes when a pager possessor confirms a call, decoding the reply signal at a base station and informing the signal to the caller. CONSTITUTION:A signal received in a pager via an antenna 1 and an antenna switch 2 is demodulated by a reception RF circuit 11, a demodulation signal is led to a decoder 12, and when it is discriminated that the call is addressed to the own pager, a beeper 13 is energized to inform the call to the possessor. When the pager possessor confirms the call to the own pager, an operation circuit 23 is operated to activate a power supply control circuit 3 to apply power to a transmission RF circuit 21 and an encoder 22. The encoder 22 encodes the content of operation inputted to the circuit 23 to generate a code in response to the content of operation. The code is led to the circuit 21 to modulate the carrier, the result is amplified and irradiated from the antenna 1 via the switch 2. The radio wave is received by the base station, where the signal is decoded and informed to the caller as the status of the called party. |
