JPH04207443A - Automatic answering telephone set - Google Patents

Abstract

PURPOSE:To allow an external telephone set to listen to a message addressed to itself through remote control and to prevent interception by comparing a code generated from an identification means with an ID code stored in a memory and transferring the mode to the remote control mode when they are coincident. CONSTITUTION:A registration means 13 registers an ID code set as an initial value and a time to revise the ID code and a memory 17 stores the registered ID code and a clock circuit 19 counts time. A revision means 18 revises the ID code stored in the memory 17 by using a signal outputted for each preset time from the clock circuit 19 and an identification means 15 receives a DTMF signal sent from an external telephone set and identifies the DTMF signal to generate a code corresponding to the DTMF signal. Then a remote means 20 compares a code generated from the identification means 15 with the ID code stored in the memory 17 and when they are coincident, the mode is transited to the remote control mode. Thus, interception is prevented and a message addressed to itself is listened to by the external telephone set with remote control.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention provides DTM F (Di
The present invention relates to an answering machine that uses an ALTone Multi Frequency signal as a remote control signal.

(Prior Art) A conventional answering machine of this type is disclosed in Japanese Patent Publication No. 1-4922.
As shown in Publication No. 7, the device is configured so that the remote control operation can be prohibited using the remote control. If there is a problem with eavesdropping, a DTMF signal corresponding to a code prohibiting remote control operation is transmitted. If this DTMF signal is accepted, subsequent remote control operations can be blocked, so eavesdropping by third parties can be completely prevented.

(Problem to be solved by the invention) However, if a remote control prohibition code is sent even at − degrees,
Again, even if I wanted to listen to Metsusafe myself, I had the inconvenience of not being able to operate the remote control and being unable to hear Metsusafe from an external telephone.

Therefore, the present invention was devised to solve these conventional problems, and it is possible to listen to messages at any time by operating the remote control from an external telephone, and completely prevent eavesdropping. The purpose of the present invention is to provide an answering machine that can be used as an answering machine.

(Means for Solving the Problem) Therefore, in order to achieve such an object, the present invention has the following features:
A registration means for registering an ID code to be set as an initial value and a time to change this ID code, and a registered ID
A memory for storing a code, a clock circuit for measuring time, a means for changing the ID code stored in the memory by a signal output from the clock circuit at preset intervals, and an external telephone. The transmitted DTMF signal is received, this DTMF signal is identified, and this DTMF
Signal +: Identification means that generates a corresponding code, and the code generated by this identification means is compared with the ID code stored in the memory, and when the two match, the remote control mode is activated. #I is made by remote means.

(Function) According to the present invention, since the ID code is sequentially set based on the initially set ID code every time a preset time elapses, it is possible to prevent eavesdropping and to always You can freely listen to one message sent to you using an external telephone using the remote control.

(Embodiment) FIG. 1 is a block diagram showing an embodiment of a remote control-operable answering machine 11 of the present invention, in which a registration key,
A registration means 13 for registering an ID code consisting of a numeric keypad, a flash key, a code key, etc.; an identification circuit 15 for identifying a DTMF signal sent via a line 14; and an identification circuit and output data of the registration means 13. The input register 16 receives the output data of the input register 15 as input data, and the memory 17 stores the ID code and the like based on the output data of the input register 16.

Furthermore, a shift register 18 shifts the data stored in the memory 17 according to a time signal output from the clock circuit 19 at preset intervals, and a shift register 18 shifts the data stored in the memory 17 and the output data of the memory 17 and the contents of the input register 16. The apparatus includes a remote means 20 for comparing the two and shifting the telephone to a remote control mode when a match is detected, and a mechanism control section 12 operated by the remote means 20.

As shown in FIG. 2, the appearance of the answering machine 1 shows that in addition to the handset 36, a registration key 31 serving as the registration means 13;
Flash key 32, numeric keypad 33, asterisk key 3
4. Equipped with 35 sharp keys.

Next, the operation will be explained based on the flowchart in FIG.

Step 1: Press down the registration key 31 in the registration means 13, and press the numeric keypad 33 for example "1", "2", "3"
, "4" in sequence.

Step 2: The ID codes "1", "2", "3", and "4" of the initial data output from the registration means 13 are placed in the input reno star 16.

Step 3 ID code “1” placed on the human-powered Rensta
”, “2”, “3”, and “4” are stored in the memory 17.

Step 4: Set how many hours the initial data is to be shifted. For example, to shift every three hours, press the "3" button on the numeric keypad 33 while holding down the registration key 31. In this case, the flash key 32, asterisk key 34, and pound key 35 can also be used for input instead of the registration key.

Step 5: Data "3" is instructed to the driver 18.

Step 6: When three hours have passed since the initial ID code was set, the clock circuit 19 indicates the time, and the data in the memory 17 is "1", "2", etc. based on the data "1" instructed to the shift register 18. Shift 3", 4"
1'', ``2'', ``3'', and ``5''.

Step 7 Knotted "1", "2", "3", "5"
``A new ID code is stored in Memo 1 River 7.

Step 8 Similarly, after 6 hours have passed since the initial ID code setting, the data in Memo January 7 will be changed to 1","
2”, “3”, and “6”. From now on, 9.
After 12, 15, and 21 hours, the initial ID codes are “1,” “2,” and “3.”
, return to "4".

Step 9 Call the answering machine 11 from an external telephone (not shown) and enter the initial ID code "l",
DTMF signals corresponding to ``2'', ``3'', and ``4'' are transmitted.

Step 10. This DTM F signal is sent to the identification circuit 15 via the line 14. This DTMF signal is identified by the identification circuit j5, and input to the input reno star 16 as "1" or "2".
”, “3”, and “4” are entered.

Step 11: After completing the number entry, the contents stored in the input register 16 and the contents stored in the memory 17 are compared by the remote means 20 to detect whether or not they match.

Step 12: If it is within 3 hours from the time of initial setting, the ID code will match the initial ID code (0゛), so remote means 2
A coincidence detection signal from 0 is applied to the mechanism control unit 12, and in step 13 the process shifts to remote control mode and starts remote control operation.

Step 14 If more than three hours have passed since the initial setting, no match is detected in the remote means 20 (N),
Since it is not possible to shift to remote control mode, playback operations such as business messages cannot be performed.

In the embodiment described above, the knot time of the ID code was set to 3 hours, but if the knot time of the ID code is set in units of 1 hour using the same setting method, 1 to 24 settings are possible. Frequently changing the ID code in this way may confuse even the parties involved, so the ID code is shifted once every 12 hours, for example, once every 12 hours, and the ID code is may be limited to two types.

Further, the number of digits of the ID code is not limited to four digits, and any other number of digits may be used.

(Effects of the Invention) As is clear from the description of the above embodiments, the present invention has the following advantages:
With the simple operation of setting the initial ID code and the time to change the ID code in advance, the ID code will be changed sequentially every time the preset time elapses, which can prevent eavesdropping and prevent wiretapping. You can also freely listen to messages sent to you using the remote control from an external telephone.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the answering machine of the present invention, FIG. 2 is an external view of the answering machine, and FIG.
2 is a flowchart used to explain the operation of the apparatus shown in FIG. 1. FIG. 11...Answering machine 12...Mechanism control unit 13...Registration means 14...Line 15...Identification circuit 16...Input register 17...Memory 18...Nftlenster ID... Clock circuit 20...Remote means agent Patent attorney role Masaaki -2, Answering machine device Fig. 1 Fig. 2

Claims (3)

[Claims] (1) A registration means for registering an ID code to be set as an initial value and a time to change the ID code, a memory for storing the registered ID code, a clock circuit for measuring time, and the setting from the clock circuit. means for changing the ID code stored in the memory by a signal outputted every time the ID code is outputted, and a DTMF transmitted from an external telephone.
identification means for receiving the signal, identifying the DTMF signal, and generating a code corresponding to the DTMF signal;
D code and when the two match, the remote
An answering machine, characterized in that it comprises remote means for shifting to a control mode. (2) The answering machine according to claim 1, further comprising a shift register that shifts the initial value ID code at each set time. (3) To register the ID code, use the registration key, flash key,
2. An answering machine according to claim 1, wherein the answering machine is operated by selectively operating some of the numeric keypad and code keys.