JPS5816657B2 - answering machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an answering machine that allows a user with an answering machine to call the message of a caller recorded while the user is away from home and listen to the contents of the message. .

Conventionally, in this type of device, the control signal for calling the home answering machine has been transmitted using a single frequency or a mixed frequency, but in order to maintain the confidentiality of calls, it is necessary to prepare a large number of channels, and the method used Moreover, there are drawbacks such as the need to prepare a large number of oscillation element selection and reception elements, the complexity of changing channels, and the possibility of erroneous operation due to noise inserted into the line in the case of a single frequency.

The present invention uses a frequency shift signal (hereinafter referred to as FS signal) as a control signal to code a channel into an appropriate number of pulses,
For example, two frequencies F1. Not only can a large number of channels be extracted using only F2, and the disadvantages of conventional methods such as the complexity of changing channels and malfunctions due to line noise etc. can be eliminated, but also it is possible to easily create a large number of control signals by pulse coding. It has characteristics such as being able to

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the remote signal generator of this embodiment, where 1 is an operation button, 2 is a circuit power supply section, 3 is a code number setting section, and 4 is a code pattern set in the setting section 3. A register section, 5 a generation section that generates a clock signal for shifting the contents set in the register section 4, 6 an FS signal oscillation section that generates an FS signal wave based on the signal code pattern that is the output of the register section 4, and 7 an oscillation section for an FS signal. 8 is a speaker; 9 is a register section 42; a generating section 52; an oscillating section 6; This is part of a control timer that controls the operating time of the signal amplification section 7.

Fig. 3 shows a part of the main body of the answering machine, 10 is the main body, 11 is an automatic ringing part, and 12 is a detection part that receives and detects a remote control signal when recording the message of the answering machine. It is.

13 is a limiting amplification unit, 14 is a filter for FS signal detection,
15 and 16 are detection units for frequencies F1 and F2, respectively;
17 is a register section that sets the detected code pattern; 18 is a clock generation section that takes the code into the register section 17; 19 is a collation section for the signal code pattern set in the register section 17; and 20 is operated by the collated output. A flip-flop 21 is a timer for setting and resetting the register section 17.

The operation of the embodiment configured as above will be explained.

When the operation button 1 in FIG. 1 is pressed, the power supply section 2a operates, and the control timer section 9 operates as shown in FIG. 2a.

Then, a code pattern of a certain length (for example, 101001
) is set in the register section 4, the contents of the register section 4 are shifted by the clock generated from the generating section 5, and a serial pit pattern is sent out.

Then, the oscillator 6 outputs the pS signal shown in FIG. 2C,
The signal is amplified by a signal amplification device 7, an FS signal tone is output from a speaker 8, and this signal tone is transmitted to the line through the telephone set.

In the main body of FIG. 3, when reading a caller's message recorded while the caller is away, the control signal from the line is amplified by the limit amplification unit 13 through the contact 82 of the relay and the communication transformer T. .

Then, only the signal is extracted by the detection filter 14, detected by the detection sections 15 and 16, and demodulated as the original signal code pattern as shown in FIG.

This code causes the clock generator 18 to sample the signal code distorted by line noise as shown in FIG. The code pattern is verified in section 19, and if the verification result is correct, the flip-flop 20 is turned on as shown in FIG. 4e by the output shown in FIG. 4d, and the main body is controlled as a DC control signal.

The timer 21 generates the signal shown in FIG. 4a, sets the register 17 by the demodulated signal, and resets it when there is no signal.

As is clear from the above embodiments, according to the present invention, an FS signal that is resistant to noise is used, the signal generator sends out the FS signal only for a certain period of time, and the detection section samples the detected signal. Even if the signal is distorted by noise, etc., there is a noise margin, so the signal set in the register is unlikely to be affected.

Furthermore, since the register is set only during signal detection and reset after detection and verification, even if the signal code pattern is incorrect due to noise, the verified output will not be generated, and the flip-flop will not malfunction because there is no ONL. .

However, it still has the characteristics that the signal code pattern can be easily changed and a large number of control signals can be generated.

[Brief explanation of drawings]

Fig. 1 is a block diagram of the main parts of an answering machine according to an embodiment of the present invention, Fig. 2 is a signal waveform diagram thereof, Fig. 3 is a block diagram of other main parts, and Fig. 4 is a signal waveform diagram thereof. It is. 15.16...Detection section, 17...Register section, 18...Clock generation section, 19...
...Verification section, 20...Flip-flop.

Claims (1)

[Claims] 1. A detection unit to which an FS signal transmitted through a telephone line is applied and detects a code pattern, a clock generation unit to sample the code pattern, and a register unit to register the sampled code pattern.
A timer that starts with the output from the detection section and resets the register section when the output disappears, a matching section that matches a preset pattern with the code pattern of the register section, and an answering machine using the output of this matching section. an answering machine having means for generating a control signal for reproducing a ringing message recorded therein.