TRANSMITTER FOR METER INSPECTION INFORMATION

摘要

PURPOSE:To transmit meter inspection information on no-ringing basis and to answer to even a general subscriber telephone set automatically by connecting a telephone set to a telephone circuit under the command of a decision means which decides that a center signal is not obtained from a meter inspection center within a specific time after an answer signal is sent out. CONSTITUTION:A general call discrimination device 13 starts timer operation on the basis of a start signal from an answer signal sending circuit 10 and when there is no reset signal obtained from a meter inspection information transmitting circuit 11 within a timer time To, it is discriminated that the center signal from the meter inspection center 3 is not obtained, thereby outputting a synchronizing signal. A timer circuit 13a incorporates an integrated circuit for voice synthesis and operates under the command of a timer circuit 13a to send out a voice answer signal to the telephone circuit L1 through the 1st switching means 16a. A call signal sending circuit 15 sends out a call signal to the telephone set 6 through the 2nd switching means 16b under the command of a voice signal sending circuit 14 and the timer circuit 16a.