JPH03280648A - Automatic answering telephone system - Google Patents

Abstract

PURPOSE:To prevent inoperation of an automatic answering telephone system due to unexpected off-hook of a telephone set by providing a slide switch selecting whether the automatic answering telephone system is restored or its operation is continued depending on an output from an off-hook detection means to the automatic answering telephone system. CONSTITUTION:A line monitor circuit 1 in an automatic answering telephone system(TAD) detects a call signal sent from a station and a voltage change in lines L1, L2 by off/on-hook of a telephone set TEL connecting in parallel with the TAD and is connected to the lines L1, L2 via resistors R1, R2 of high resistance. Moreover, a slide switch SW 1 is provided to select whether or not the TAD is restored during the operation of the TAD by the off-hook of the telephone set TEL. Thus, even when a telephone set connected in parallel with the TAD is off the hook by an infant of the like during the operation of the TAD because of an incoming call, no hindrance is given to the talking by having only to skid the slide switch SW 1 in advance to the position ON.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an answering machine and a telephone set used in a bare manner.

[Conventional technology]

Traditionally, telephone answering machines (hereinafter referred to as TADs) and telephones connected in parallel to the devices, or devices that integrate TADs and telephones, have been widely used.
If the called party (an infant) carelessly takes the phone off the hook while the AD is in operation, anticipating whether the caller is the mother or father of the family, the TAD will immediately recover and will not be able to respond any further. They could not leave it to TAD.

[Problem that the invention seeks to solve]

As mentioned above, conventionally, when a call is received and the TAD is in operation, the TA
If a child, etc. goes off-hook with a phone connected in parallel to D, the TAD will stop working and then recover, and an adult family member who calls after a while... When they pick up the RADSET, they are already connected to the other party. However, due to the presence of TAD, there was a serious problem in that it was impossible to make a call without knowing who the caller was.

[Means for solving problems]

In order to solve the above problems, the present invention provides TAD
To provide a means that does not interfere with telephone calls at all by sliding a slide switch to the ON side in advance even when an infant or the like is able to take off the hook of a telephone connected in parallel to a TAD during the operation of the TAD.

〔Example〕

The structure and operation of the embodiments of the present invention will be explained below.

In the first embodiment shown in FIG. 1, L1 and L2 are telephone lines, 1 is a telephone, and TAD is an answering machine.

In this TAD, 1 detects the voltage change of the line (telephone line) due to the off-hook and on-hook of the telephone equipment connected in parallel to the above-mentioned TAD and the calling signal sent from the station, although the illustration is simplified. This line monitoring circuit is connected to the telephone line via high resistance value resistors R1 and R2. The alternating current signal of the ringing signal is output from the output terminal 0UTI, the off-hook/off-hook detection output of the telephone on standby of the above-mentioned TAD is output from the output terminal 0UT2, and the on-hook/off-hook detection output of the telephone in operation of the TAD is output. It is configured to be taken out from terminal 0UT3.

The CPU is a one-chip microprocessor with a built-in program in the form of ROM.I-1 to I-5 are input ports, 0-1 to 0-6 are output ports, and ``ma'' is an interrupt terminal. SW1 is a slide switch used to select whether or not to restore the TAD by off-hooking the telephone while the TAD is in operation.

2 is a memory for responding and recording messages (OGM) as digital signals 3 is OG in the above memory
4 is an analog switch, and 5 is an amplifier circuit. Reference numeral 6 denotes an ICM recording section for recording a message (ICM) from a calling party, and in this embodiment a cassette tape is used. M is a motor for driving the cassette tape, and SD is a solenoid for switching the operation of the cassette tape. Further, Y-1 is a closing relay for closing the telephone line when a calling signal is detected, and has a contact point y1-1.

Next, in accordance with the flowchart of FIG. 2, when this first state is set, the addresses, etc. for locating the beginning of the OGM in the memory 2 are initialized.

First, when a calling signal from the office enters the telephone line L1, L2, this calling signal is applied to the line monitoring circuit 1 via the resistors R1, R2, output terminal 0UTl, input port I-
1 is detected in step S2, step S2
becomes affirmative, and the process moves to step S3. At this point, relay Y-1 is held on via output port 0-1, and telephone lines L1 and L2 are connected via its contact y1-1.

At this point, the incoming call signal stops, and the caller and this TAD
A loop is formed in between.

In the next step S4, the slide switch SW1
Test whether it is slid to the ON side or the OFF side. If it is on the ON side, interrupts are permitted in step S5. If it is on the OFF side, interrupts are prohibited in step S6.

The operation when the telephone device is taken off-hook to permit or disable this interruption will be described later.

In the next step S7, the response message (OGM) recorded as a digital signal in the memory 2 is converted into an analog signal by the voice analysis/synthesis LSI, and sent to the caller via the analog switch 4, amplifier circuit 5, and line transformer LT. Sent out. After sending this response message, the process moves to step S8, and the caller's message is recorded in step S8.
to move to.

When a person at home goes off-hook the telephone while the above-mentioned response message is being sent or the caller's message is being recorded, the line monitoring circuit 1 detects the voltage drop in the telephone lines dL1 and L2 at that time, and the output terminal Generates output from 0UT3. This output is applied to the input port I-3 and simultaneously applied to the interrupt terminal INT via the OR gate 7.

Therefore, if interrupts are permitted in step S5 above, whether the response message (OGM') is being sent in step S7 or the caller's message (ICM) is being recorded in step S8, this After proceeding to step S10 due to an interrupt operation, proceeding to step S
9, the telephone lines Ll and L2 are disconnected, and furthermore, in step S1, this TAD is initialized as described above, and it is restored to the standby state in step S2, in which it waits for the incoming of a calling signal.

Meanwhile, slide the slide switch SWI to the ON side,
When interrupts are prohibited in step S6 described above, the process does not proceed to the interrupt in step 810 described above even if the telephone device is off-hook. Therefore, whether the TAD is sending a response message in step S7 or recording a message from the caller in step S8, the TAD operates without being affected by the off-hook of the telephone connected in parallel with the TAD. will continue.

As mentioned above, this device can change the flow of operation using the slide switch SWI, so if the parent is absent and the child is alone at home, the parent can switch the slide switch SWI when going out. If you set the OFF-side interrupt prohibition state, even if a child accidentally takes the phone off-hook while the TAD is operating due to an incoming call, the TAD will not recover, so the caller can state his or her business on the TAI). You can leave it behind.

If the parent is at home, slide the slide switch to the O°N side, and if you take the phone off-hook while the TAD is operating due to an incoming call, the TAD will immediately recover, allowing both parties to talk on their phones. becomes.

Next, a second embodiment will be described with reference to FIG.

This second embodiment does not use a CPU and is constructed from discrete components. In the figure, the line monitoring circuit 1 and the SWI slide switch have the same functions as those described in FIG.

30 is a flip 70 knob, 31 is an OR gate, 32 is a recording/playback unit that sends a response message and records a message from the caller, and 33 is a vOX that restores the device when the voice from the caller is interrupted. It is a circuit. This may be done by fixing the recording time using a timer circuit.

Now, when a call signal is input to the telephone lines L1 and L2, the output from the output terminal 0UTI of the line monitoring circuit 1 charges the capacitor C30 via the resistor 30, sets the 7-lip-flop 30, and loads the relay Y- Hold 1 on. At the same time, the output of the flip-flop 30 activates the recording/reproducing section 32, and sends a prerecorded response message to the caller. After sending this response message, the mode switches to the recording mode for the caller's message, and when the caller's voice is interrupted, the VOX circuit 3
3 resets the flip-flop 30 via the OR gate 31.

This restores relay Y-1 and restores this answering machine to the standby state. If the telephone is placed off-hook while the above-mentioned response message is being sent or the caller's message is being recorded, the above-mentioned As described in the first embodiment, an H level signal is output from the output terminal 0UT3 of the line monitoring circuit 1, and the resistor R
31 to the input terminal of the OR gate. If the slide switch SW is slid to the OFF side at this time, the above output resets the flip-flop 3o via the OR gate 31 and restores the device to the standby state as described above.

On the other hand, when the slide switch sw1 is slid to ON III, the input terminal of the OR gate 31 is grounded, so the flip-flop is not reset and the device continues to operate as an answering machine.

〔Effect of the invention〕

As described above, in the present invention, even if a telephone connected in parallel with an answering machine goes off-hook when receiving a call, the answering machine continues to operate without being restored by switching the slide switch.

Even if an adult picks up the phone or another parallel phone after a few seconds, the call can be continued, and the answering machine can be prevented from malfunctioning due to a child's inadvertent taking the phone off the hook. The operability is extremely simple, as you can easily check from the outside whether the mode is to continue operation without restoring the answering machine, or to restore the answering machine, by checking the position of the slide switch. Its practical value is great.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a first embodiment to which the present invention is applied, FIG. 2 is a flowchart showing the operation of the first embodiment, and FIG. 3 is a block diagram showing the configuration of a first embodiment to which the present invention is applied. FIG. 2 is a block diagram showing the configuration of a second embodiment.

Claims (2)

[Claims] (1) Closing means for detecting a calling signal from a telephone office and closing the telephone line; Response message sending means for transmitting a response message to the caller after the closing means has closed the telephone line; a message recording means for recording a message from the caller after sending a response message; an off-hook detection means for detecting off-hook of telephones connected in parallel to the same telephone line after the above connection; and an output from the off-hook detection means. and a slide switch for selecting whether to restore the answering machine or to continue operating the answering machine. (2) The slide switch for the above selection is installed in a place that can be easily seen from the outside, so that when you are away you can easily check which mode to use depending on the situation at home, and in a place where children etc. cannot touch it. The answering machine according to claim 1, characterized in that the telephone answering machine is installed in a telephone.