JPH05167738A - Speech time restriction device for telephone system - Google Patents

Abstract

PURPOSE:To restrict a long phone call of the user by setting a speech time in advance and opening a speech line when the speech time exceeds the setting time. CONSTITUTION:When a user of the telephone set hooks off a handset 8 for dialing, moving contacts(a), (b) of a hook switch 9 are turned to fixed contacts (d), (e). Then a voltage of 5V outputs an L signal to a terminal P1 of an I/P port 12 through the contacts (e)(b). The L signal is fed to a base of a transistor(TR) 3, which is turned off and TRs 1,2 are turned on, then a telephone line 1 is closed. A control section 11 sets a time for speech restriction stored in advance in a RAM 13 to a register 15. While monitoring whether or not the handset 8 is hooked on, the control section 11 judges whether or not the speech time reaches the restricted time. Then the control section 11 raises an alarm with a margin time and opens the telephone line when the setting time is exceeded. Then a long phone call time of the user is restricted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone call time control device for forcibly restricting a call and preventing a long call when a call is made over a preset time.

[0002]

2. Description of the Related Art Recently, since long telephones occupy a telephone line for a long time and charges are high, a telephone having a call time warning device for warning the excess of the call time is used.

This telephone call time warning device is provided with a timer for measuring the call time and an alarm display section for issuing an alarm signal. If the call time is set in advance, the call warning time is reached. At this time, the alarm display unit is activated to warn the user who is talking that the phone call is long.

[0004]

However, since the call time warning device of this type of telephone does not forcibly limit the call by merely calling the attention of the long telephone, it receives an alarm from the alarm display section. Whether or not the user hangs up the call is left to the conscience of the user, and its effectiveness is poor.

The present invention has been made in view of the above circumstances, and an object of the present invention is to make a telephone call by forcibly regulating the telephone call and preventing a long telephone call when a telephone call is made over a preset time. To provide a time regulation device.

[0006]

In order to solve the above problems, a telephone call time limiter according to the present invention comprises a time setting means for presetting a call time and a telephone call when the call time exceeds the set time. And a control means for controlling the opening of the line.

[0007]

If the call time for preventing long calls is set in advance by the time setting means, if the user of the telephone tries to talk for more than this set time, for example, a warning display for exceeding the time is displayed. After that, the telephone line is opened.
This prevents the telephone line from being monopolized for a long time.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the electrical construction of a telephone call time limiter.

A telephone line 1 is connected to a diode bridge 3 via an input terminal 2. The negative side of the diode bridge 3 is connected to the ground, and the positive side thereof is connected to a line closing circuit 4 for closing and opening the telephone line 1 and a hook switch 9.

The line closing circuit 4 is connected to a speech network 5 which performs a 2-wire to 4-wire conversion. Also,
The signal line 5a of the speech network 5 is connected to a transmitter (not shown) of the handset 8 via the terminal 7a, and the signal line 5b is connected to a receiver (not shown) of the handset 8 via the adder 6 and the terminal 7b. Has been done.

The line closing circuit 4 includes transistors Tr1 and Tr1.
The transistor Tr1 is connected to the cathode of the diode bridge 3, the collector is connected to the speech network 5, and the base is connected to the collector of the transistor Tr2 via the resistor R1. The emitter of the transistor Tr2 is connected to the ground, and the base is connected to the resistor R2 and the collector of the transistor Tr3, respectively. The emitter of the transistor Tr3 is connected to the ground, and a resistor R is provided between the emitter and the base.
4 is connected to the base of the controller 11 via the resistor R3.
Is connected to the P1 terminal of the I / O port 12.

The hook switch 9 has two movable contacts a,
b and four fixed contacts c, d, e and f, the movable contact a is a resistor R2, and the movable contact b is an I / O port 12
Are respectively connected to the P2 terminals. The fixed contact d is connected to the positive electrode side of the diode bridge 3, and the fixed contact e is connected to a 5V power source for outputting a signal of "H" level. The movable contacts a and b are in contact with the fixed contacts c and f connected to the ground when on-hook, and are in contact with the fixed contacts d and e when off-hooked.

The P3 terminal of the I / O port 12 constituting the control unit 11 is connected to the adder 6 so that the output signal from the control unit 11 is sent to the handset 8. The I / O port 12 has a numeric keypad 1
0a, a call time registration setting key 10b, etc., and is used for dial operation and call time setting operation.
The output of is derived. Although not shown,
An alarm generation unit, which is a display unit for giving an alarm sound when the talk time is exceeded, is connected to the I / O port 12.

The control unit 11 includes an I / O port 12, a RAM
13, ROM 14, register 15, oscillating circuit 16, frequency dividing circuit 17, timer 18, and CPU 19, which are mutually connected via a bus. The control unit 11 controls the operation of the entire apparatus, and also issues a warning when the user exceeds the set time for a call, and subsequently controls the telephone line 1 to be opened.

The RAM 13 stores time data and the like for setting the excess time, and the ROM 14 stores the operation program of the control unit 11. The register 15 temporarily stores and counts time data. The oscillator circuit 16 gives a frequency signal of a constant cycle to the frequency divider circuit 17. Frequency divider 1
Reference numeral 7 divides the output signal from the oscillation circuit 16 and supplies it to the timer 18 as a count reference signal. The timer 18 measures time and outputs a signal by counting up. C
The PU 19 is a central processing unit that arithmetically processes various input data.

Next, the operation of the transmission restriction device using the telephone having the above configuration will be described with reference to the flowchart of FIG.

In this telephone, the dial number for controlling the call time and the call time to be restricted are set by performing an input operation with the registration setting key 10b of the operation unit 10 prior to use. The set dial number and call restriction time are stored in the RAM 13. Here, the call restriction time is a time including a time for giving a warning and a margin time until the line is disconnected after the warning.

In this state, when the user of the telephone set picks up the handset 8 to make a call, the movable contacts a and b of the hook switch 9 come into contact with the fixed contacts d and e, respectively. As a result, 5V is applied via the contact eb.
Is applied to the P2 terminal of the I / O port 12. The control unit 11 detects the off-hook by the "H" signal being given to the P2 terminal (step S10), and the I / O
The "L" signal is output to the P1 terminal of the port 12. This "L" signal is supplied to the base of the transistor Tr3 via the resistor R3, so that the transistor Tr3 is turned off. This off operation causes the contact point d of the hook switch 9
The DC voltage of the telephone line 1 is applied to the resistor R2 via -a. Along with this, a base current flows through the transistor Tr2, and the transistor Tr2 is turned on. As a result, a base current flows through the transistor Tr1 via the resistor R1, so that the transistor Tr1 is turned on, the DC voltage of the telephone line 1 is supplied to the speech network circuit 5, and the line is closed.

After that, when the dialing operation of the dialed number is performed from the operation unit 10, the dialed number is sent out to the telephone line 1 and the call can be made by the response of the destination telephone.

On the other hand, the control section 11 judges whether or not this dial number is subject to call restriction (step S11). Then, when the call restriction is applied, the control unit 11 sets the register 15 to the time for call restriction stored in the RAM 13 in advance (step S1).
2). At this time, a timer interrupt signal is given to the register 15 (step S13), and the timer 18 is set to 1 (step S14). As a result, the timer 18 counts the time since the off-hook.

Thereafter, the control unit 11 monitors whether or not the handset 8 is hooked (step S1).
5) It is determined whether or not the call time has reached a preset call restriction time and has become long, that is, whether or not the register 15 has become 0 (step S16). And
When the register 15 becomes 0, the control unit 11 outputs an alarm sound signal from the P3 terminal of the I / O port 12 at this point. This alarm sound signal is output to the handset of the handset 8 via the adder 6 so that the user in the call can hear it (step S17).

Thereafter, the control unit 11 sets the register 15 to R
The margin time after warning is set in advance in the AM 13, and the timer 18 is activated to count the margin time after warning (step S18). During this time, the alarm may be sounded continuously to call the user's attention to the talk time excess.

On the other hand, when the timer 18 stops counting after the margin time has been counted, the control section 11 sends an "H" signal to the P1 terminal. As a result, the transistor T
A base current flows through r3 to turn on the transistor Tr3, the base of the transistor Tr2 becomes the ground potential, and the transistor Tr2 turns off. Along with this, the base of the transistor Tr1 is opened, so that the transistor Tr1 is also turned off. Here, when the transistor Tr1 is turned off, the load of the telephone line 1 is only the resistance R2 via the contact da of the hook switch 9, but if the resistance value of the resistance R2 is set to 1 MΩ or more, The telephone line 1 is opened (step S1)
9).

If the user goes off-hook on the handset 8 before reaching the call restriction time or the margin after the warning, the operation proceeds from step S15 to step S20, and the contact c-a of the hook switch 9 is reached. And f-b contact each other, and "L" is applied to the P2 terminal via the contact f-b.
A signal is given.

When the control section 11 receives this "L" signal and confirms that it is on-hook, it stops the timer 18 and resets the register 15 to stop counting the call restriction time and the allowance time ( Step S
20). Then, an "H" signal is sent to the P1 terminal to activate the line closing circuit 4 to open the telephone line 1 (step S21).

As described above, according to the call time regulation device of the present telephone, a warning is issued when the preset call time is reached, and the line is forcibly opened after the allowance time, so long calls are prevented. You can

Although the dial number and the call time are regulated in the above embodiment, only the call time is regulated, and the call of the present invention is applied to all dial numbers transmitted from this telephone. Time may be restricted.

Further, in the above embodiment, the line closing circuit 4 is mainly composed of three transistors, and the hook switch 9 has two movable contacts a, b and four fixed contacts c, d ,.
Although it is configured by e and f, other circuit configurations may be used as long as the line can be automatically opened when the margin time after the warning is reached.

Further, in the above embodiment, the call time is regulated. However, if the telephone has a means for calculating the call charge like an ISDN communication terminal, the call charge is subject to the regulation. You can

Furthermore, the alarm sound signal output from the P3 terminal of the control unit 11 may be a warning by a voice by a voice synthesis analysis circuit in addition to a buzzer sound or the like. It is more effective if a display lamp such as an LCD is attached to the telephone for visual display.

[0032]

The telephone call time limiter according to the present invention, when the user continues to talk for more than the call set time,
Since the line is opened and the call is cut off after the warning is issued, the problem that the telephone line is monopolized for a long time can be avoided, and the long call can be effectively prevented.

[Brief description of drawings]

FIG. 1 is a block diagram showing an electrical configuration of a telephone call time regulation device according to the present invention.

FIG. 2 is a flowchart for explaining a call time restriction operation.

[Explanation of symbols]

 1 Telephone line 4 Circuit closed circuit 8 Handset 9 Hook switch 10 Operation part 11 Control part

Claims (1)

[Claims] 1. A call time regulation for a telephone, comprising: time setting means for presetting a call time; and control means for controlling to open a telephone line when the call time exceeds the set time. apparatus.