Automatic talking-test terminal device applicable to unattended substation

The invention discloses an automatic talking-test terminal device applicable to an unattended substation. The technical scheme of the device comprises a power supply unit, an intelligent control unit, a ringing detection unit and a DTMF sending unit, wherein the power supply unit is connected with the intelligent control unit, the ringing detection unit and the DTMF sending unit, respectively; the ringing detection unit is connected with the intelligent control unit; the intelligent control unit is connected with the DTMF sending unit, and the power supply unit powers the intelligent control unit and the DTMF sending unit; respectively; under a standby state, the DTMF sending unit is partially powered off; and under an analog off-hook state, the intelligent control unit controls on and off of an optocoupler relay to power the DTMF sending unit. 本发明公开种适用于无人值守变电站内的自动试话终端装置。采用的技术方案包括电源单元、智能控制单元、振铃检测单元、DTMF发送单元，所述电源单元分别与所述智能控制单元、振铃检测单元及DTMF发送单元连接；所述振铃检测单元与所述智能控制单元；所述智能控制单元与所述DTMF发送单元连接，所述电源单元，将智能控制单元和DTMF收发单元分别供电