| 摘要 |
A telephone answering system with recording and playback modes. The system is coupled to a telephone line and is electrically independent of the telephone set with which it operates. The system is actuated by a ring signal on a telephone line and includes a circuit which is responsive to the ring signal to interrupt and seize the phone line for a short interval. Thereafter a hold circuit coupled to the line feeds its output to a pulse noise rejection circuit which determines if a true call is on the line and if so triggers a control circuit which causes a prerecorded message on a first tape recorder to be transmitted to the caller. Afterward, the system will couple any spoken message from the calling party to a second tape recorder in response to the prerecorded message. The recorded messages on the second tape recorder from the calling party then may be played back later at will.
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