JPH01265773A - Public telephone set - Google Patents

Abstract

PURPOSE:To recognize it how much minutes talking is available as soon as a public telephone caller loads a telephone card or deposits a coin and dials by displaying a remaining speech time. CONSTITUTION:The telephone set is provided with a toll station number detection section 16 detecting a toll station number, a unit time traffic number calculation section 17 using a unit time speech traffic number (unit traffic number) required for the unit time speech from a caller station position of the public telephone caller till a toll station address point as an output data and a remaining speech time calculation section 18 calculating the remaining speech time by the unit traffic and the remaining traffic outputted from the unit time traffic number calculation section 17. Then the output of the remaining speech time from the remaining speech time calculation section 18 is displayed on a display section 15. Thus, the public telephone caller deposits a coin or loads a telephone card to the remaining traffic detection section 14 and gives a dial, then the caller can recognize it how much minutes the caller can make talking.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a public telephone, and particularly to a public telephone having a display function.

(Prior Art) Conventionally, public telephones of this type have a function of displaying the remaining power, but do not have a function of displaying the remaining talk time.

FIG. 3 is a block diagram of a conventional public telephone.

In FIG. 3, the conventional public telephone 1a has a telephone line 2J.
<Dial transmission unit 12 that sends out a dial signal, and billing pulse detection unit 13 that detects billing pulses from the telephone line 2
, a remaining power detection section 4 that detects the remaining power by inputting a coin or a telephone card, and a display section 15 that displays the remaining power.

Next, the operation of a conventional public telephone will be explained using FIG.

First, a caller from a public phone inputs coins or money to the telephone car 1 into the remaining power detection section 14 . When the remaining power detecting unit 1.4 checks that the input coin or telephone card is a genuine coin and guarantees a power of 1 or more, it closes the telephone line 2, activates the dialing unit 12, and dials the number. Enables signal transmission. Further, the remaining power is output and the remaining power is displayed on the display section 15.

Next, when the caller inputs a dial from a public phone and the dial transmitter 12 sends a dial signal to the telephone line 2 to start a call, a predetermined charging pulse is sent from the toll office of the destination at regular intervals. is sent to telephone line 2. When the billing pulse detection unit 13 detects this charging pulse, it sends a detection signal to the remaining power detection unit 14, and the remaining power detection unit 14 depletes the remaining power one degree at a time, and displays the depleted remaining power on the display unit]5. let

[Invention or problem to be solved]

The conventional public telephones mentioned above are designed to display the remaining number of points, but not the remaining call time, so the caller from the public telephone can use the coins he or she has input or the telephone number 1 to 1 left. The disadvantage is that there is no way to know whether you can talk for a minute or not, and there are cases where you run out of points in the middle of a call and the call is forcibly disconnected.

[Failure to solve the problem]

The public telephone of the present invention includes a dial transmitter that connects to a telephone line and sends out a dial signal, a billing pulse detector that detects a billing pulse received from the telephone line, and a coin or coin input by a caller of the public telephone. a remaining power detection section that detects a first remaining power from a telephone card and also decreases the first remaining power one degree at a time by inputting a charging pulse detection signal from the charging pulse detection section; a display section for displaying the second remaining power detected by the public phone caller; A unit time call frequency calculation unit that outputs the frequency required for a unit time call from the calling station point of a public telephone caller to the above-mentioned area code point, and a unit time output from this unit time call frequency calculation unit. a remaining call time calculation section that calculates a remaining call time based on the call frequency and the second remaining frequency, and the dial transmission section includes a dial buffer that stores the dial information input from the dial key. , and a call key for starting to send the dial information to the telephone line, and displays the remaining call time output from the remaining call time calculation section in the display -5= section.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 and FIG. 2 respectively show the first embodiment of the present invention. FIG. 3 is a block diagram showing a second embodiment.

In FIG. 1, the public telephone 1 according to the embodiment of Mizuo 1 includes a dial transmitting section 12, a billing pulse detecting section 13, and a remaining power detecting section 14, which are included in the conventional public telephone 1a shown in FIG. , display section 15, and in addition to these, an area code detection section 16 for detecting an area code number, and an area code detection section 16 for detecting an area code number, and an area code detection section 16 for detecting an area code number, and an area code detection section 16 for detecting an area code number. A unit time frequency calculation unit 17 that uses the unit time frequency (hereinafter referred to as unit frequency) as an output data, and a remaining call time that calculates the remaining call time using the unit frequency output from the unit time frequency calculation unit 17 and the remaining frequency. The calculation unit 18 is configured to include a calculation unit 18.

Next, the operation of the embodiment of Sui-Tei 1 will be explained.

First, a caller from a public phone inputs coins or money to the telephone car 1 into the remaining power detection unit 14 . When the remaining power detecting unit 14 detects that the input coin or telephone card is genuine and guarantees a power of 1 or more, the telephone line 2 is closed.

The dial transmitter 2 is activated to enable transmission of a dial signal. Further, the remaining power detection unit 14 displays the remaining power (this is referred to as X power) on the display unit 15, and at the same time,
It is sent to the remaining call time calculation section 18.

Next, when the caller makes a dial input from the public phone, the area code detection unit 16 extracts the area code from the dial input and inputs it to the unit time frequency calculation unit]7. The unit time frequency calculation unit 17 outputs the unit frequency (referred to as y degrees/second) necessary for a unit time call from the calling station point of the public telephone caller to the area code point of the destination as data. The remaining call time calculation unit 18 calculates the remaining call time (this is Z) from the remaining power (X power) from the remaining power detection unit 14, z=x/y seconds, and displays the calculation result on the display unit]5. indicate.

Furthermore, when the caller from the public telephone completes dialing and a response is received from the called party, a predetermined charging pulse is sent to the telephone line 2 for a certain period of time from the toll office of the called party.

When the charging pulse detection section 1B detects this charging pulse and sends a detection signal to the remaining power detection section 14, the remaining power detection section 14 subtracts one power from the current remaining power and displays the remaining power on the display section 15. At the same time, the remaining call time from the remaining call time calculation section 18 is also displayed on the display section 15.

Next, a second embodiment of the present invention will be described.

In FIG. 2, the public telephone 1' of the embodiment of Section 2 has the same components as those of the first embodiment shown in FIG.

The difference between the public telephone 1' of the embodiment of this section 2, which is not shown in FIG. 2, from the public telephone 1 of the first embodiment shown in FIG. 1
23 for storing the dial information inputted from the telephone line 2], and a dialing key 122 which is activated to transmit the dialing information to the telephone line 2.

Next, the operation of the embodiment of Section 2 will be explained using FIG. 2.

When a public phone caller uses a public phone, he or she inputs coins or a telephone car l~ into the remaining power detecting section 14. If the input coin or telephone card is guaranteed to be one or more points, the remaining power detecting section 14 allows input from the dial key 123 to the dial buffer 121. In addition, the remaining power (X power) is output to the display section 15 and displayed at the same time as the remaining call time calculation section 18.
The data is output to , and becomes the data for calculating the remaining call time.

Next, when the public telephone caller inputs dial information into the dial buffer 121 using the dial key 123, the area code detection unit 16 extracts the area code from the code information stored in the dial buffer 121, and The time frequency calculation unit 17 outputs the area code as a hair trace input. The unit time calculation unit 17 outputs as data the number of degrees (y degrees/second) required for a unit time call from the calling station point of the public telephone caller to the area code point of the destination, which corresponds to the A1 Jerez input. do. The remaining call time calculation unit 18 calculates the remaining call time from the remaining power (X degrees) input from the remaining power detection unit 14 and the unit power (y degrees/second) input from the unit time power calculation unit 17, and calculates the remaining call time. It is displayed on the display section 15.

If the public phone caller determines that the call time is insufficient, he/she inputs changes to the telephone card or addition of coins to the remaining count detection section 14, and the remaining call time is calculated again and displayed on the display section 15. Display.

When the caller from the public telephone determines that there is enough remaining call time and presses the call key 122, the dial buffer 12
The dial information stored in 1 is transmitted to telephone line 2.

Next, when the dialing is completed and the called party answers, a predetermined billing pulse is sent to the telephone line 2 at regular intervals from the toll office of the called party.

When the charging pulse detection section 13 detects the charging pulse and sends it to the remaining power detection section 14, the remaining power detection section 14 erases the remaining power one by one and displays the remaining power on the display section. At the same time, the remaining call time from the remaining call time calculation section 18 is also decreased and displayed on the display section]5.

〔Effect of the invention〕

As explained above, the present invention allows the remaining talk time to be displayed, so that callers from public telephones can know how many minutes they have left to talk at the same time as they enter coins or telephone numbers 1~ and dial. You can summarize the contents of the call according to the remaining call time, and you can start the call after preparing coins or telephone cars according to the call time in advance. It has the effect of reducing the inconvenience of being forcibly disconnected during a call.

[Brief explanation of the drawing]

FIG. 1 and FIG. 2 respectively show the first embodiment of the present invention. Figures 71,372 and 3, which do not show the second embodiment, are block diagrams showing an example of a conventional public telephone. 1, ]′, la public telephone, 2 telephone line, ]2.1
2' Dial transmitting section, 13-Charging pulse detecting section, 1
4 Remaining frequency detection section, 15... Display section, 16 Area code detection section, 17... Unit time frequency calculation section, 18. Remaining call time calculation section, 121 Dial huffer, 122...
Call key, 123/dial key. Figure 2

Claims (2)

[Claims] (1) A dial transmitter that connects to a telephone line and sends out a dial signal; a billing pulse detector that detects billing pulses received from the telephone line; a remaining power detection unit that detects the remaining power of 1 and decreases the first remaining power one degree at a time in response to input of a charging pulse detection signal from the charging pulse detection unit; a second display section for displaying the number of remaining degrees; a unit time call frequency calculation section which outputs the frequency required for a unit time call from the originating station point to the area code point; 2. A public telephone set comprising: a remaining call time calculating section that calculates a remaining call time based on a remaining frequency of 2; and displaying an output of the remaining call time from the remaining call time calculating section on the display section. (2) The dial transmission unit according to claim (1) includes a dial buffer for storing the dial information according to claim (1) inputted from a dial key, and a dial buffer for storing the dial information according to claim (1), which is input from a dial key, and a telephone line according to claim (1). 2. The public telephone set according to claim 1, further comprising a call key for activating a call to make a call.