JPH0276440A - Telephone set - Google Patents

Abstract

PURPOSE:To automatically release on-hook holding and to remove the invalid holding of a line by adding an on-hook holding timer, an alarm oscillation circuit and a timer output circuit to a telephone set. CONSTITUTION:When a hook switch 1 turned from off-hook holding to on-hook, an on-hook holding timer 9 starts to be driven by a hook switch state detecting part 5 and an off-hook holding control part 8. Even when the on-hook holding state is continued, the output terminal O1 of the timer 9 is turned to 'H' after the passage of T1min, an alarm oscillation circuit 10 is driven and an alarm sound is generated through a loudspeaking circuit 14. The output terminal O1 is turned to 'L' after the passage of T2sec, the alarm sound is stopped, and after the passage of T3sec, a pulse is generated on the output terminal O2 of the timer 9 and the output of a holding button detecting part 6 is turned to 'L' by a 1st output of a timer output circuit 11. Simultaneously, the output of a loudspeaking button detecting part 7 is turned to 'L' by a 2nd output of the circuit 11. Thereby, the circuit 14 and a holding circuit part 16 are turned to a waiting state released at its operation through a state control part 12.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a telephone set, and more particularly to a telephone set including a state control circuit that has a hold function and a sound amplification function and performs state control.

[Conventional technology]

Conventionally, this type of telephone has been configured so that when it goes on-hook from a hold state, it goes into a standby state, and others that are configured so that it can continue on-hook and become on-hook.

Next, a conventional telephone will be explained with reference to the drawings.

FIG. 2 is a block diagram showing an example of a conventional telephone.

In Fig. 2, the telephone of this conventional example has a hook switch (
H3) 1, hold button (H8) 2, and loudspeaker button (LK)
) 3 and resistor 4, a hook switch state detection section 5 that detects the state of H8I, a hold button detection section 6 that detects on/off of HK2, a loudspeaker button detection section 7 that detects on/off of LK3, and a hook switch. An off-hook hold control section 8 that controls the reset of the hold button detection section 6 and the setting of the amplification button detection section 7 according to the input states of the state detection section 5 and the hold button detection section 6, the hook switch state detection section 5, and the hold button detection section. a state control section 12 that controls the state of the telephone according to the conventional example according to the input conditions of the telephone 6 and the loudspeaker button detection section 7; a speech circuit section 13; a loudspeaker circuit section 14; It is configured with

Next, the operation of this conventional example will be explained.

The off-hook hold control unit 8 has a second input terminal at a high level (
When the first input terminal changes from low level (hereinafter referred to as "L") to "H" (hereinafter referred to as "rH"), one pulse is output to the second output terminal, and the second input terminal changes from low level (hereinafter referred to as "L") to "H". When the first input terminal changes from rH to "L" again at rHJ, the first output becomes 1.
Outputs pulse output.

When the H3I is off-hook and connected to the ground, the first output terminal of the hook switch state detection section 5 becomes rl, J, and the communication circuit section 13 operates through the state control section 12 to enter the communication state. When HK2 is pressed to place the call on hold, the hold button detection unit 6 operates and the output terminal becomes rH, and the hold circuit unit 16 operates through the state control unit 12, and the call circuit unit 8
stops and goes into an off-hook hold state. When the hook is further on-hook, the output terminal of the hook switch state detection section 5 becomes rL.
, → "H", a pulse waveform of "L" → rHJ → "L" is generated at the second output terminal of the off-hook hold control section 8, and the output of the loudspeaker button detection section 7 becomes "H" and the state Since the loudspeaker circuit section 14 operates through the control section 12 and the hold circuit section 16 also remains in operation, an on-hook hold state is entered. If you go off-hook here, the output terminal of the hook switch state detection section 5 changes to rH,→r 1-'', and the pulse waveform of Lj changes to the first output terminal of the off-hook hold control section 8 as rLj→r)(J→" occurs, and the output terminal of the hold button detection unit 6 is “L”
Also, since the output terminal of the hook switch state detection section 5 is "L", the output terminal of the loudspeaker button detection section 7 also becomes r) (J→rl-J), and the loudspeaker circuit section 14 and hold circuit section 16 operate together through the state control section 12. The call will be released and the call state will be restored. However, unless the line goes off, the hold state will continue, and even if the other party cancels the call state, the line will remain closed.

[Problem to be solved by the invention]

The above-mentioned conventional telephones are configured so that when on-hook from a hold state, the phone enters a waiting state, or is configured so that on-hook hold is possible by continuing the hold state, so those capable of on-hook hold are on-hook. If you leave the call on hold, there is a drawback that the line may remain closed even if the other party cancels the call.

[Means to solve the problem]

The telephone of the present invention is a telephone with a hold and amplification function, and includes a hook switch state detection unit, a hold button detection unit, a loudspeaker button detection unit, an off-hook hold control unit that controls hold during off-hook, and an on-hook hold timer. a timer output circuit, an alarm oscillation circuit, a state control section for the telephone, a call circuit section, a loudspeaker circuit section, a dial circuit section, and a hold circuit section that outputs a hold tone; The output terminal of the switch state detection section is connected to the first input terminal of the off-hook hold control section and the first input terminal of the state control section.
and a first input terminal of the timer output circuit, and an output terminal of the hold button detection section is connected to a second input terminal of the state control section and a second input terminal of the off footer hold control section. an output terminal of the loudspeaker button detection section is connected to a third input terminal of the state control section, and a first output terminal of the off-hook hold control section is connected to a second input terminal of the timer output circuit. A second output terminal is connected to a set input terminal of the loudspeaker button detection unit and a start input terminal of the on-hook hold timer circuit,
The output terminal of the circuit is connected to the input terminal of the alarm oscillation circuit, the second output terminal is connected to the third input terminal of the timer output circuit, and the first output terminal of the timer output circuit is connected to the reset input of the hold button detection section. A second output terminal is connected to the reset input terminal of the loudspeaker button detection section at the end, an output terminal of the alarm oscillation circuit is connected to the first input terminal of the loudspeaker circuit section, and a second output terminal of the state control section is connected to the reset input terminal of the loudspeaker button detection section. 1. Second. The third and fourth output ends are respectively connected to an input end of the call circuit section, a second input end of the loudspeaker circuit, an input end of the dial circuit section, and an input end of the hold circuit section.

〔Example〕

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

FIG. 1 is a block diagram of a telephone according to an embodiment of the present invention.

In FIG. 1, the same components as in the conventional example are given the same reference numerals as in FIG. 2.

The difference between the telephone of this embodiment shown in FIG. 1 and the conventional example shown in FIG. This is added to the example.

The on-hook hold timer 9 starts operating when a pulse is input to the set input, and after 10 minutes, output terminal 0 becomes open HJ for T2 seconds, and after 13 seconds, a pulse output is output to output terminal 02. In addition, the set input end is off-hook hold control section 8
A reset input terminal is connected to the first output terminal of the hook switch state detection section 5 .

The alarm oscillation circuit 10 oscillates when the start input terminal S becomes r)IJ. The input terminal S is connected to the output terminal O1 of the on-hook hold timer 9, and the output terminal O is connected to the loudspeaker circuit section 14.

The timer output circuit 11 includes a two-man power NOR circuit and a two-man power NOR circuit.
It is composed of an AND circuit and an inverter circuit, and requires two human power N.
The first input terminal of the OR circuit is connected to the first output terminal of the on-hook hold control section 8, the second input terminal is connected to the output end of the on-hook hold timer 9, and the output terminal is connected to the reset input terminal R of the hold button detection section 6. is connected to. Also, the first of the two-output AND circuit
The input terminal is connected to the first output terminal of the hook switch state detection section 5, the second input terminal is connected to the output terminal of the inverter circuit, the output terminal is connected to the reset terminal R of the loudspeaker button detection section 7, and the output terminal of the inverter circuit is connected to the reset terminal R of the loudspeaker button detection section 7. The input end is connected to the output end of the on-hook hold timer 9.

Next, the operation of this embodiment will be explained.

Similar to the operation explanation of the conventional example in FIG. 2, when on-hook from off-hook hold, the output of hook switch state detection unit 5 changes from rHJ to “L” and a pulse waveform is generated at the first output terminal of off-hook hold control unit 8. Therefore, even if the on-hook hold timer 9 starts operating and continues the on-hook hold state, the output terminal O1 of the on-hook hold timer 9
changes from "L" to "r) (J", and the alarm oscillation circuit 10 operates and an alarm sound is generated through the loudspeaker circuit section 14.T
After 2 seconds, the output terminal 01 changes to rHJ→rL J, stopping the generation of the alarm sound, and furthermore, after 13 seconds, the output terminal 02 of the on-hook hold timer 9 changes to rl-, →rl(J→
A pulse waveform of rlJ is generated, a pulse waveform is generated at the first output (two-man power NOR output terminal) of the timer output circuit 11, and the output of the hold button detection section 6 becomes "L". At the same time, a pulse waveform of rH, → "L" → rH, is generated at the second output (two-man power AND output terminal) of the timer output circuit 11, and the output of the loudspeaker button detection section 7 also becomes rl-J, so that the state Through the control unit 12, the loudspeaker channel unit 14. The holding circuit unit 16 is deactivated and enters a standby state.

〔Effect of the invention〕

As explained above, the present invention adds an on-hook hold timer, an alarm oscillation circuit, and an output control circuit to a conventional telephone, so that even if the off-footer hold state is left unattended, an alarm sound is generated after a certain period of time. Even if the line is left on hold without realizing it, the line is automatically restored to the standby state after a certain period of time, and the on-hook hold can be automatically released, thereby eliminating invalid hold on the line.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention. FIG. 2 is a block diagram showing an example of a conventional telephone. DESCRIPTION OF SYMBOLS 1... Hook switch (H3), 2... Hold button (HK), 3... Loudspeaker button (LK), 4... Resistor, 5... Hook switch state detection section, 6... Hold button detection unit, 7... Loudspeaker button detection unit, 8... Off-hook hold control unit, 9... On-hook hold timer,
1゜...Alarm oscillation circuit, 11...Timer output circuit, 12...State control section, 13...Telephone call circuit section,
14... Loudspeaker circuit section, 15... Dial circuit section, 1
6...Holding circuit section.

Claims (1)

[Claims] In a telephone with a hold and amplification function, a hook switch state detection unit, a hold button detection unit, a loudspeaker button detection unit, an off-hook hold control unit that controls hold when off-hook, an on-hook hold timer circuit, and a timer output circuit. and an alarm oscillation circuit, a state control section for the telephone, a speech circuit section, a public address circuit section, a dial circuit section, and a hold circuit section that outputs a hold tone, and the output of the hook switch state detection section an end connected to a first input end of the off-hook hold control section, a first input end of the state control section, and a first input end of the timer output circuit; a second input terminal of the state control section and a second input terminal of the off-hook hold control section; an output terminal of the loudspeaker button detection section is connected to a third input terminal of the state control section; A first output terminal of the off-hook hold control section is connected to a second input terminal of the timer output circuit, and a second output terminal is connected to a set input terminal of the loudspeaker button detection section and a start input terminal of the on-hook hold timer circuit. , a first output terminal of the on-hook hold timer circuit is connected to an input terminal of the alarm oscillation circuit and a second output terminal is connected to a third input terminal of the timer output circuit;
An output end of the alarm oscillation circuit is connected to a reset input end of the hold button detection section, a second output end thereof is connected to a reset input end of the loudspeaker button detection section, and an output end of the alarm oscillation circuit is connected to the first reset input end of the loudspeaker circuit section. a first of the state control section;
Second, third, and fourth output terminals are connected to an input terminal of the telephone call circuit section, a second input terminal of the loudspeaker circuit, an input terminal of the dial circuit section, and an input terminal of the hold circuit section, respectively. A telephone characterized by: