JPH02280562A - Charge information display system for public telephone set - Google Patents

Abstract

PURPOSE:To inform the talking available time for remaining traffic unit for input charge independently of near or remote distance for a telephone set of a called user by providing a display function displaying a talking available remaining time to a public telephone set. CONSTITUTION:When a CPU 27 of an exchange 2 detects an off-hook of a public telephone set 1 through an INF 21, an RCV 23 receives a dial signal from the public telephone set 1 through an SW 22. Then the CPU 27 analyzes a dial signal of the RCV 23 to read the talking time (data in second) per one traffic unit by calling districts from the received dial signal stored in a MEM 26 and when the public telephone set 1 starts communication, the data in second per one traffic unit is sent to the public telephone set 1 via a path of SND 24, SW 22, INF 21, and telephone line. Upon the receipt of the data in second per one traffic unit to be sent, the RCV 12 of the public telephone set 1 informs the data to a CPU 16 as a calculation coefficient. The CPU 16 calculates the remaining time from the traffic unit on the input card to be detected and the reception coefficient and displays the result on a DSP 14 as a talking available time.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for displaying billing information on public telephones in a general telephone line network.

[Conventional technology]

In the conventional billing information display method of public telephones, for example, each time a public telephone receives a billing pulse signal sent from a telephone exchange for the remaining power of the entered telephone card, the display shows the remaining power by subtracting the remaining power from the telephone exchange. is displayed.

[Problem to be solved by the invention]

In the conventional public telephone billing information display method described above,
Since only the remaining power is displayed on the display of public telephones, if the call time per degree is short, such as when making long-distance calls, especially long-distance calls, you will not be able to see how many calls you can make with the remaining power. The disadvantage is that it is unknown.

[Means to solve the problem]

The billing information display system for public telephones according to the present invention has a storage section in advance that stores the call time per frequency for each region of dialing in an exchange that accommodates the public telephone. comprising transmitting means for reading the call time per call of the telephone from the storage unit and transmitting the read call time per call to the public telephone as numerical data, and transmitting the numerical data from the exchange to the public telephone. a receiving means for receiving the received numerical data; a calculating means for calculating the available talk time from the frequency of the call charge entered into the public telephone using coins or a prepaid card; and a display means for displaying the calculation result of the available call time. It is equipped with

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention.

In FIG. 1, the present embodiment includes a public telephone 1 and an exchange 2 that accommodates the public telephone 1 via a telephone line, and the public telephone 1 includes a coin detector 17 for detecting the insertion of a coin. , a card detector 18 that detects the insertion of a prepaid card (hereinafter referred to as a card), and an interface section (hereinafter referred to as INF) 11 that interfaces with a telephone line;
A receiving unit (hereinafter referred to as RCV) 12 that receives numerical data sent via a telephone line, a transmitting unit (hereinafter referred to as O8C) 13 that transmits a dial signal, and a display unit (hereinafter referred to as O8C) that displays available call time, etc. (hereinafter referred to as DSP) 14, a dial unit (hereinafter referred to as DL) 15 for inputting a dial number, and a central control unit (hereinafter referred to as CPU) that controls the entire public telephone @1.
) 16, the exchange 1 includes an INF 21 that interfaces with a telephone line, an RCV 23 that receives a dial signal from a public telephone 1, a transmitter (hereinafter referred to as SND) 24 that transmits numerical data, and a time signal. a clock unit (hereinafter referred to as TIM) 25 that generates a signal, and a switch unit (hereinafter referred to as S'W) 22 that forms a speech path and a data communication path.
, a storage unit (hereinafter referred to as MEM) 26 in which the call time per frequency for each destination area of dialing is stored in advance, and a CPU 27 that controls the entire exchange 2.

Next, the operation of displaying available call time on the public telephone 1 in this embodiment will be explained.

Now, assume that a 50 degree card is input into the public telephone 1 and a dial number for a certain destination is called from the DL 15.

When the CPtJ 16 of the public telephone 1 receives a "good J" detection signal for the card input by the card detector 18,
The telephone line is captured via INFII and the dial number input from DL15 is sent to 08013. 03C1
3 sends a dial signal of the dial number input to the exchange 2 via INFII.

When the CPU 27 of the exchange 2 detects off-hook of the public telephone 1 through the INF 21, the CPU 27 of the exchange 2 sends the RC through the SW 22.
A dial signal from the public telephone 1 is received at V23.

Next, the CPU 27 analyzes the dial signal of the RCV 23, reads the call time (seconds data) per call destination region from the MEM 26 from the received dial signal, and when the public telephone 1 starts talking, from 5ND24 to 5W22-
The number of seconds per degree data is sent to the public telephone 1 through the NF 21- via the telephone line. RCV12 of public telephone 1
When receiving the sent seconds per degree data, C
This is notified to the PU 16 as a calculation coefficient.

For example, if the number of public telephones 1 and the destination subscriber is 1 at a time,
Assuming that the conversation can last for 0 seconds, the CPU 27 sends "10" to the SND "24" to the RCV 12 via the 5W22-2NF21 telephone line, and the RCV 12 sends "10" to the CPU 16.
' is reported as a coefficient. The CPU 16 calculates the remaining time based on the frequency of the detected input card and the reception coefficient, and sends it to the DSP.
14 as the callable time. In this case, 50(
760 seconds (degrees)
Display on 4.

The callable time of CPtJ16 is calculated each time data is sent from 5ND24 to RCV12, and the time calculation device in CPU16 subtracts one second at a time until the next numeric data is received. The result is sent to DSP14
Send and display.

〔Effect of the invention〕

As explained above, the present invention has a display function that displays the remaining call time on a public telephone, so that the user can receive a call based on the remaining number of input charges regardless of whether the callee's phone is at a short distance or a long distance. Since it is possible to notify the call time, users can make calls with peace of mind, and
This has the effect of avoiding forced disconnection of calls due to insufficient charges as in the past.

Tough Ace part (INF), 22... Switch part (SW
), 23... Receiving section (RCV) 24... Transmitting section (SND), 25... Clock section (TIM), 26...
Memory unit (MEM>, 27... central control unit (CPU)
.

Claims (1)

[Claims] A switchboard accommodating the public telephone has a storage section that stores in advance the call time per number of dial destinations for each region, and the storage section stores the call time per number of calls of the public telephone that originated the dial. and transmitting means for transmitting the read call time per call to the public telephone as numerical data, a receiving means for receiving the numerical data from the exchange to the public telephone, and a receiving means for transmitting the received numerical data to the public telephone. A public telephone set comprising: calculation means for calculating the available call time from the number of call charges entered into the public telephone using coins or prepaid cards; and display means for displaying the calculated allowable call time. billing information display method.