JPH0441657Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a public telephone with a built-in microcomputer.

[Conventional technology]

In addition to normal voice communication, digital composite public telephones and the like can perform desired data communication by connecting a data terminal device such as a facsimile transmitter. Also, regarding the billing method, in addition to coins, so-called telephone cards (frequency cards) can also be used. Control of these various functions is program-controlled by a microcomputer.

[Problem that the invention attempts to solve]

By the way, in complex public telephones controlled by such microcomputers, as with general public telephones, it is necessary to check the operation of various functions at the final stage of manufacturing, and also to check the operation of various functions as necessary during maintenance. It is necessary to check the operation of the functions as appropriate. However, conventionally, when control programs (tasks) corresponding to various functions are executed during such inspections, it is not possible to easily know the transition state of each task. I couldn't do it.

[Means for solving problems]

The public telephone of the present invention has been developed in view of the above problems, and includes an execution means for executing a task based on the operation of a predetermined switch, and a task number corresponding to the task being executed by this execution means, and execution of the task. and control means for sequentially and alternately displaying transition state numbers corresponding to the states to which the card has transitioned on the card remaining power display.

[Effect]

When a predetermined switch is operated, the current task number and transition state number of the task being executed are sequentially and alternately displayed on the card remaining power display.

〔Example〕

Hereinafter, the present invention will be described in detail along with examples.

FIG. 1 is a block diagram of a digital composite public telephone that is an embodiment of the present invention. A PB dial 2, a card remaining balance display 3, a coin unit 4, a card unit 5, a display switching lock switch 6, a non-lock switch 7, and a basic communication unit 18 are connected to the microcomputer 1. The microcomputer 1 organically links these elements according to several control programs (tasks) and operates to satisfy desired functions such as voice communication, facsimile communication, and degree card control.

The basic communication unit 18 includes a switching circuit 12, which is connected to a 4-wire 2-wire converter 9.
Then, via the I/O control circuit 8, the digital public lines L1 and L2 are selected as the CODEC 13 to which the telephone circuit 14 is connected, or the interface circuit 17 to which a data terminal device such as a facsimile machine is connected. Connect to A transmitter 15 and a receiver 16 are connected to the telephone call circuit 14, and when the switching circuit 12 is in the state shown in the figure, the transmitter 15 and the receiver 16 are connected to the digital public lines L1 and L2. There will be.
Note that reference numeral 11 denotes a calling voice generator, which is driven via a calling circuit 10.

FIG. 2 shows part of a state transition diagram regarding a telephone call task, which is one of the tasks performed by the microcomputer 1. The call task has several transition states such as empty and call origination, and in this embodiment, each transition state corresponds to the state number as follows.

- Empty...1 - Calling...2A - Accepting call...2B - Waiting for dialing...2C - Dialing...2D - Waiting for confirmation of incoming response...3 - Communicating...6 In other words, for example, Empty ( When the device goes off-hook from state 1), a call is made to the network and the call state 2A is entered, and when an acceptance signal is received from the network in this state, the call acceptance state 2B is entered. As shown below, the transition states change one after another.

FIG. 3 is a flowchart of a control program corresponding to the state transition diagram of FIG. This flowchart corresponds well to the state transition diagram in Figure 2, so a detailed explanation will be omitted, but the noteworthy point is that the contents of the separately provided state number storage means are Each time, the state number is rewritten to the corresponding state number. For example, processing
305, 307, 309, etc. In this manner, the state number of the latest transition state is always written in the state number storage means for the call task.

Similarly, corresponding status number storage means are provided for other tasks as well.
The state number of the latest transition state is rewritten for each task.

Next, display switching processing will be explained. Fourth
As shown in the figure, when the display switching lock switch 6 is "off", the remaining card power is displayed on the card remaining power display 3 (step
402). However, when the display switching lock switch 6 is turned on (step 401), the remaining power display is immediately stopped and a status display process is executed (step 403).

The status display process is performed according to the flowchart in FIG. That is, due to the timer processing, the output of the display instructing means changes between "0" and "1" every second (step 501), and when the display switching instructing means is "1", the above-mentioned state number memory is The contents are read out from the means and the status number is displayed on the card remaining power display 3 (step 503). On the other hand, when the display instruction means is "0", the task number specified by the non-lock switch 7 is displayed (step 502). Therefore, the task number and status number are displayed alternately. For example, if the task number of the call task shown in FIG. 2 is 1 and the current state of the call task is call acceptance state 2B, then
Number 1 indicating the task number and number indicating the state number
2B and 2B are displayed alternately like "1→2B→1→2B→..." every second.

The reason why the task number and the status number are displayed alternately in this way is because the display capacity of the card remaining power display 3 used as a display means is small, and the display capacity of the card remaining power display 3 is sufficiently large. For example, the task number and state number may be displayed simultaneously in parallel.

FIG. 6 is a flowchart for switching the task number and status number to be displayed. If the display switching lock switch 6 is turned off, no processing is executed in this flowchart (step 601). When the display switching lock switch 6 is turned on, it is determined whether the non-lock switch 7 has been operated (turned on). If non-lock switch 7 is not operated,
The non-lock switch work flag is set to "0" (step 606), and judgments 601 and 602 are executed again.

When non-lock switch 7 is operated, judgment is made.
The process moves to step 602 and it is determined whether the non-lock switch work flag is "0" or not, but since the flag is initially set to "0" by process 606, the process moves to step 604 and the display task number is set to 1. Move up by one. For example, if there are four types of tasks executed by microcomputer 1, 1 to
Numbers up to 4 are associated with each task, and if the displayed task number is 2 before carrying out the increment in process 604, the displayed task number becomes 3 by this process. However, if the displayed task number before being advanced is the maximum value 4,
The process 604 returns to the minimum value 1.

After the above-mentioned advance processing is performed, the non-lock switch work flag is set to "1" (step 605), and judgments 601 to 603 are executed again. if,
If the non-lock switch 7 continues to be pressed, the process 606 is not executed and the non-lock switch work flag is not reset to "0", so the process does not proceed from judgment 603 to process 604 and judgment 601
~603 will be repeated. When the non-lock switch 7 is released, the process moves from judgment 602 to process 601, and thereafter judgments 601 and 602 are repeated.

In this way, judgments 602, 603 and processing 605, 606
As a result, when the non-lock switch 7 is operated once, the displayed task number is incremented by 1 regardless of the pressing time, and when the non-lock switch 7 is released and operated again, the displayed task number is further incremented. ing.

The non-lock switch 7 of this embodiment is also used as a self-diagnosis switch, and if the non-lock switch 7 is operated while the display switching lock switch 6 is "off", the switch shown in FIG. There is no longer a function to increment the displayed task number as shown in , but instead there is a function to start a self-diagnosis operation.

Although this embodiment is a digital composite public telephone that uses a digital public line, it can also be applied to a public telephone that uses an analog public line.

[Effect of idea]

As described above, according to the public telephone of the present invention, when a predetermined switch is operated, a task is executed and the task number and transition state number being executed are sequentially and alternately displayed on the card remaining power display. Therefore, it has become possible to perform detailed functional tests at the final stage of the manufacturing process and during maintenance.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing a digital composite public telephone according to an embodiment of the present invention, Fig. 2 is a state transition diagram of a call task carried out by the public telephone of Fig. 1, and Fig. 3 is a flowchart corresponding to the call task. , FIG. 4 is a flowchart showing the display switching operation, FIG. 5 is a flowchart showing the status displaying operation, and FIG. 6 is a flowchart showing the display task number switching operation. 1...Microcomputer, 3...Card remaining energy display, 5...Card unit, 6...Display switching lock switch, 7...Non-lock switch.

Claims (1)

[Scope of utility model registration request] A public telephone comprising a card remaining power indicator that displays the remaining card power and a microcomputer, in which a plurality of tasks are executed by the microcomputer; A control means for sequentially and alternately displaying a task number corresponding to the task being executed by the execution means and a transition state number corresponding to a state transitioned to by the execution of the task on the card remaining power display. public telephone.