JPH04239860A - Automatic answering telephone system - Google Patents

Abstract

PURPOSE:To surely prevent interception due to leakage of an IC code. CONSTITUTION:The telephone set is provided with memories 17,18 storing a series forming an ID code, a count means 19 to count a setting time, an exchange means 21 rearranging the series forming the ID code automatically after lapse of the setting time and the exchange means 21 revises the ID code automatically after lapse of the setting time.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention provides an answering machine that is equipped with a function for remote control using an external telephone (hereinafter also referred to as remote control), and that automatically changes the ID code at a preset time. It relates to telephone devices.

0002

[Prior Art] Conventionally, in this type of answering machine, as described in Japanese Patent Publication No. 1-49227, prohibition of remote operation has been made possible by remote control (hereinafter also referred to as remote control). There is something.

[0003] Therefore, if you are worried about eavesdropping, you can send a DTMF signal corresponding to a remote operation prohibition code from an external telephone to the answering machine. If the answering machine accepts this DTMF signal, remote operation can be blocked after acceptance.
Eavesdropping can be prevented.

[0004] As described above, even in the above-mentioned conventional answering machine, operation by remote operation can be prohibited by remote control, and eavesdropping can be prevented.

[0005]

[Problems to be Solved by the Invention] However, in the above-mentioned conventional answering machine, once the DT is prohibited from remote operation,
When the MF signal is sent, there is an inconvenience that if the user wants to listen to the business message again, he cannot do so using an external telephone.

[0006] The present invention solves these conventional problems, and makes it possible to listen to business messages etc. at any time by remote control using an external telephone while one is out of the house, and also to reliably prevent eavesdropping. The purpose of this invention is to provide an answering machine.

[0007]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a registration means for registering an ID code, a memory for storing this ID code by dividing it into upper digits and lower digits, and a registering means for registering an ID code. a clock circuit that measures the time until the time when the stored ID code is changed to a new ID code; a setting means that sets the time to change the ID code; a detection circuit that generates a code corresponding to the signal; an input register that compares the upper digits and lower digits of the code output from the detection circuit and the ID code stored in the memory by the registration means; remote means for shifting to a remote state only when the verification results match; and exchanging means for exchanging the ID code stored in the memory between the upper and lower digits when the set time has arrived; It is equipped with the following.

Furthermore, when the time set by the setting means arrives, the clock circuit notifies the sound generation circuit that the set time has arrived. As a result, a change has been made so that a voice message different from the voice message voiced at the time of ID code registration is voiced.

[0009]

[Operation] The present invention has the following effects due to the above-described structure. That is, the upper digits and lower digits of the ID code are exchanged at a preset time. After the exchange process is completed,
When a DTMF signal corresponding to the pre-registered ID code is sent from the outside, the results checked by the input register will not match, so it is possible to prohibit the remote means from shifting to the remote state. This prevents eavesdropping and allows the user of the answering machine to listen to messages and the like by remote operation.

0010

Embodiment (Embodiment 1) FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. In FIG. 1, 11 is a remotely controllable answering machine. 12 is a mechanism control section and a circuit section. 13 is a registration means for registering an ID code. A line 14 is connected to an external telephone (not shown) or the like through an exchange (not shown). A detection circuit 15 generates a code corresponding to the DTMF signal sent from the line 14. Reference numeral 16 denotes an input register, which compares the output contents of the registration means 13 and the output contents of the detection circuit 15.

Reference numeral 17 denotes an upper digit memory, and 18 denotes a lower digit memory, which separately stores the upper digit and lower digit of the ID code based on the output of the input register 16. Reference numeral 19 denotes a clock circuit, which measures the time until the set time is reached. Reference numeral 20 denotes a setting means for setting the above-mentioned set time in advance. Reference numeral 21 denotes an exchanging means, and when the time set by the clock circuit 19 arrives, the upper digit memory 1
The data exchange operation is performed such as moving the ID code stored in the lower digit memory 18 to the lower digit memory 18, and conversely moving the ID code stored in the lower digit memory 18 to the higher digit memory 17.

Reference numeral 22 denotes remote means, which stores the storage contents of the upper digit memory 17 and the lower digit memory 18 and the input register 16.
The content of the output is checked for each upper digit and lower digit, and if a match is detected, the answering machine 11 is shifted to the remote state. Reference numeral 23 denotes a voice generating circuit, which notifies the user of a new ID code by means of a different voice message when ID code exchange processing is performed.

FIG. 2 is a flowchart showing the operation when exchanging the upper digits and lower digits of the ID code in the embodiment described in FIG. 1. The setting time is set to 6 hours by the setting means 20, for example, by pressing "6" on a numeric keypad (not shown) (step 1). ID codes "1, 2, 3, 4" are registered by the registration means 13 using, for example, a numeric keypad (not shown) (step 2). The output of the registration means 13 is read into the input register 16, and ID codes "1, 2, 3, 4" are set in the input register 16 (step 3). At this time, input register 16
Among the numbers placed in the number, the upper digits "1, 2" are stored in the upper digit memory 17, and the lower digits "3, 4" are stored in the lower digit memory 1.
8 (step 4).

Now, when calling the answering machine 11 from an external telephone (not shown) in order to listen to a business message or the like, a message saying "Please enter your ID code" is sent from the voice generating circuit 23. . The operator follows this message and selects D corresponding to "1, 2, 3, 4".
Send a TMF signal (step 5). This DTMF signal is sent to the detection circuit 15 through the line 14. DTMF
The signal is identified by the detection circuit 15 and input to the input register 16.
1, 2, 3, 4'' are entered (step 6).

After completing the number setting, the contents stored in the input register 16 and the contents stored in the upper digit memory 17 and lower digit memory 18 at the time of setting are compared for each upper digit and lower digit, and it is detected whether they match. (Step 7). At this time,
Since it matches the ID code registered in advance (Step 7,
Y), the coincidence detection output is output from the remote means 22 to the mechanism control and circuit section 12 (step 8). As a result, the answering machine 11 shifts to the remote state (step 9).

[0016] Suppose that the ID code sent from the outside is "1".
, 2, 3, 4", the remote means 22
No match is detected (Step 7, N). Therefore, it does not shift to the remote state and does not perform operations such as playing back the business message (step 10).

When the set time of 6 hours has elapsed, the clock circuit 19 sends information to the exchange means 21 indicating that 6 hours have been clocked.
(Step 11). The exchange means 21 transfers the upper digit code "1, 2" stored in the upper digit memory 17 to the lower digit memory 18, and transfers the lower digit code "3, 4" stored in the lower digit memory 18 to the upper digit memory 17. Transfer (step 12). The clock circuit 19 also informs the sound generation circuit 23 that six hours have passed. As a result, a voice message with different content from the first voice message is sent. That is, an announcement is made that says "Your ID code has changed. Please enter a new ID code" (step 13). After the above exchange operation is completed, from the outside “1”
, 2, 3, 4'' (step 14), the contents of both the upper digit memory 17 and lower digit memory 18 do not match after the replacement. The device 11 prohibits transition to the remote state (step 15).

[0018] In this embodiment, the ID code is "1",
Although it is set to 4 digits (2, 3, 4"), any other number string or number of digits may be used.Furthermore, in the case of 4 digits, the upper digits are 2 digits and the lower digits are 2 digits. , it goes without saying that it is possible to divide the number of digits into other numbers, such as 3 digits for the upper digits and 1 digit for the lower digits.The point is that the number sequence that makes up the ID code is automatically divided after the above set time has elapsed. Further, although the set time for replacement is set to 6 hours, it may be changed to another set time (0 to 24 hours).

In this way, in the above embodiment, a new ID code can be specified by exchanging the upper and lower digits of a pre-registered ID code at a certain set time, thereby preventing eavesdropping. can do.

[0020]

[Effects of the Invention] According to the present invention, as is clear from the above embodiment, once the ID code and exchange time are registered,
When the set exchange time (set time) arrives as timed by the clock circuit, the upper digits and lower digits of the ID code are automatically exchanged. Therefore, with such a very simple operation, it is possible to prevent eavesdropping.

Furthermore, since the voice message is changed at the set time, it is possible to prevent operational errors such as using the previous ID code. If a third party uses the old ID code, it will not be possible to eavesdrop. Further, a third party cannot know the new ID code.

[Brief explanation of the drawing]

FIG. 1 is a schematic block diagram showing the configuration of an embodiment of the answering machine of the present invention.

[Fig. 2] Flowchart for explaining detailed operation of the embodiment shown in Fig. 1;

[Explanation of symbols]

11 Answering machine 12 Mechanism control section and circuit section 13. Registration means 14 Line 15 Detection circuit 16 Input register 17 Upper digit memory 18 Lower digit memory 19 Clock circuit 20 Setting means 21. Means of exchange 22 Remote means 23 Sound generation circuit

Claims (2)

[Claims] [Claim 1] A registration means for registering an ID code, a memory for storing this ID code by dividing it into upper digits and lower digits, and a timer for changing the registered and stored ID code to a new ID code. A clock circuit that measures the time up to this time, a setting means that sets the time to be changed, a detection circuit that receives a DTMF signal sent from the outside and generates a code corresponding to the DTMF signal, and a an input register for comparing the upper and lower digits of the output code and the ID code stored in the memory by the registration means; and remote means for shifting to a remote state only when the results of the comparison match. . An answering machine characterized by comprising an exchange means for exchanging the ID code stored in the memory between upper digits and lower digits when the set time arrives. 2. A voice generation circuit is provided, and when the time set by the setting means arrives, the voice generation circuit registers the ID code by notifying the voice generation circuit from the clock circuit that the set time has arrived. 2. The telephone answering machine according to claim 1, wherein the telephone answering machine is configured to utter a voice message different from a voice message uttered at certain times.