JPH0578055U - Phones with dial tone detection and display - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a telephone that can display that a call can be made with a lamp or the like. A dial tone detecting section 7 for detecting a dial tone to which a signal passed through the protection circuit section 6 is detected, and an output from the dial tone detecting section is amplified by a direct current amplifying section 8 and inputted to the visual display section 9 Phones with dial tone detection and display capabilities displayed by.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a telephone.

[0002]

[Prior Art]

 When making a call with a conventional telephone (without the loudspeaker function of the speaker), first raise the handset and listen to the dial tone to confirm that the call is possible before dialing. It was common. In the case of a telephone with a rotary dial or a push button on the body of the telephone, there is little discomfort in use, but there are also types in which the shape of the telephone is diversified and a push button is incorporated in the handset. When making a call, there was a complication of having to check the dial tone once with the ear, remove the handset from the ear, and then go to the ear again to make a call after operating the dial. On the other hand, in the case of a telephone with a loudspeaker function, it is not necessary to listen to the handset each time, but it has the drawback of making noise in a quiet place.

[0003]

[Problems to be solved by the device]

 Since the present invention has been proposed to remedy the above-mentioned drawbacks, its purpose is to eliminate the annoyance of dial tone confirmation by ear, and to add a visual confirmation function to speed up telephone calls. It is to provide a telephone with a dial tone detection and display function capable of servicing.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a dial tone detecting unit for detecting a dial tone to which a signal passed through a protection circuit unit is provided, and a visual display in which the output from the dial tone detecting unit is amplified and input. A telephone having a dial tone detection and display function, which is characterized by including a section, is the subject of the invention.

[0005]

[Action]

 According to the present invention, it is possible to visually confirm that the dial tone is oscillated by detecting the dial tone and displaying the dial tone, which is very convenient in use.

[0006]

【Example】

 Next, an embodiment of the present invention will be described. FIG. 1 is a diagram showing an embodiment of a telephone of the present invention, in which 1 is a telephone exchange, 2 is an incoming line, 3 is a modular jack, 4 is a telephone body, 5 is a telephone function section, and 6 is a protection circuit section. , 7 is a dial tone detector, 8 is a direct current amplifier, 9 is a display, and 10 is a constant current circuit.

FIG. 2A is a diagram showing a dial tone transmission situation in public telecommunications in a time series manner. FIG. 2 (b) is a diagram showing a display state of a lamp or the like according to the present invention in a time series manner and showing a time relation with FIG. 2 (a).

Next, the operation of this embodiment will be described. (See Fig. 1) First, when the caller lifts the handset from the telephone body 4 (off-hook), the line becomes a loop and a dial tone signal is sent from the exchange 1, but this dial tone continues for 20 seconds. After that, it changes to an intermittent busy tone at 1 second intervals (see FIG. 2 (a)). The dial tone signal enters the telephone function unit 5 and the protection circuit unit 6 via the incoming line 2 and the modular jack 3. The dial tone that has passed through the protection circuit section is detected by the dial tone detection section, and its output is amplified by the DC amplification section, input to the display section, and visually displayed.

The telephone function unit 5 is omitted since it is the same as the conventional one. 6 to 10 are additional parts according to the present invention, and the dial tone is detected through the protection circuit section 6 (which protects each section of 7 to 10 from voltage fluctuation and level fluctuation against destruction of IC etc.). Enter Part 7. This detector is a bandpass filter with steep characteristics for detecting dial tone (400 Hz). When detecting the dial tone, it outputs a predetermined DC voltage corresponding to the amplitude of the dial tone, and the DC amplifier DC amplification is performed so that the display unit 9 can be driven by 8, and the result is transmitted to the display unit. A low current type light emitting diode or a liquid crystal display is used as the display element. On the other hand, the DC voltage sent from the exchange 1 is guided from the protection circuit section 6 to the constant current circuit section 10. This circuit is a circuit for obtaining a current for operating each part of 7 to 9.

Next, the display according to the present invention will be described. As shown in FIG. 2 (b), the dial tone of the 400 Hz continuous tone transmitted along with the off-hook is detected, and the lamp of the display unit is turned on. Therefore, it can be seen that dialing is possible while the display lamp is continuously lit. If it goes off hook after dialing, a busy tone occurs and 400 Hz is intermittent at 1-second intervals, so it flashes at 1-second intervals to indicate that the call is invalid.

As described above, by implementing the present invention, the caller does not need to hear and confirm the dial tone as compared with the prior art, and the caller can confirm whether or not the call can be made. It is possible to judge. In particular, it is an effective improvement for confirming that a call can be sent to a telephone type that has a push button built into the handset itself. In addition, if a person with a physical disability who does not have sufficient hearing can use the function of the present invention when sending a fax, it is effective when sending.

[0012]

[Effect of the device]

 As described above, according to the present invention, it is not necessary to check the dial tone with the ear each time a call is made, and it is possible to know whether or not the call can be made simply by looking at the display unit. Therefore, a push button is incorporated in the handset. This is especially useful for certain types of telephones. Other uses include those using telephone lines, for example, terminals such as FAX and personal computer communications. In either case, it is possible to visually confirm whether or not a call can be made, and it is possible to make a speedy call.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an embodiment of a telephone of the present invention.

FIG. 2 shows a time-series situation of a signal, (a) shows a dial tone transmission situation in public telecommunications,
(B) shows a display state of a lamp or the like in the telephone of the present invention.

[Explanation of symbols]

 1 Telephone Switch 2 Incoming Line 3 Modular Jack 4 Telephone Main Body 5 Telephone Function Section 6 Protection Circuit Section 7 Dial Tone Detection Section 8 DC Amplification Section 9 Display Section 10 Constant Current Circuit Section

Claims (1)

[Scope of utility model registration request] 1. A dial tone detection unit for detecting a dial tone to which a signal passed through a protection circuit unit is applied, and a visual display unit for amplifying and inputting an output from the dial tone detection unit. A telephone with dial tone detection and display features.