JPH0637880A - Speaker reception circuit for telephone set - Google Patents

Abstract

PURPOSE:To perform speaker reception repeatedly while the speech of a telephone set is being performed. CONSTITUTION:In a speaker circuit connected to the reception route of a speech circuit and which emits by amplifying a reception voice, such control that a speaker reception circuit is controlled by a speaker button(non-lock) SPSW and a timer 4 reset at every operation of the speaker button SPSW and which repeats the reset via a control circuit and a speaker amplifier 7 is performed. Thereby, it is possible to perform the speaker reception repeatedly while the speech of the telephone set is being performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit configuration for realizing a speaker receiving function of a telephone.

[0002]

2. Description of the Related Art In a conventional telephone, on-hook dialing (a function that allows dialing with the handset attached, dialing while the speaker is listening) is performed, and if the other party answers, the handset is raised and the handset is used. Make a call.

Regarding the subsequent process, one method is that the speaker reception is disabled, and the other method is that if the speaker button is pressed and the handset is hung up, the speaker reception is performed in a state where the handset is lifted to enter a call. In some cases, if the handset is lifted again, the speaker reception is switched to a normal call using the handset, and this operation can be repeated thereafter.

[0004]

According to the above-mentioned prior art, the speaker reception is the speaker reception as an on-hook dialing function, and the speaker reception becomes impossible after the handset is picked up, or even if it is possible, become that way.

There is a possibility of disconnecting the call if the speaker is received by the operation of calling by the handset → pressing the speaker button → on-hook → speaker receiving → off-hook → calling by the handset and the operation is complicated and the operation procedure is incorrect.

The present invention is proposed to solve these problems, and enables a speaker to be received at the same time as a call by a handset, and allows the operation of the speaker reception to be repeated even after a call is made, and the operation can be performed. The purpose is to simplify the operation and prevent disconnection due to erroneous operation.

[0007]

According to the present invention, there is provided a speaker circuit which is connected to a receiving path of a communication circuit and amplifies and outputs a received voice, and a speaker button composed of a non-lock key.
After the speaker circuit is controlled by the timer circuit controlled by the speaker button and the hook switch, and the control circuit for controlling the on / off of the speaker circuit by the output of the timer circuit, the speaker receiving circuit is once started, The speaker reception and the handset reception can be switched arbitrarily and repeated.

[0008]

According to the present invention, a speaker can be received at the same time as a call by the handset, and a person other than the caller can hear the call when necessary, and the handset can be raised and lowered each time the speaker is heard. There is no need to do so, and it is possible to repeatedly receive the speaker by simply pressing the speaker button.

[0009]

1 is a circuit diagram showing an embodiment of the present invention, FIG.
Shows a time chart for explaining the operation of each unit in FIG. 1.

Terminals L1 and L2 are external line terminals, 1 is a rectifier circuit, 2 is a dial circuit, 3 is a communication circuit, 4 is a timer,
5 is a buffer, 6 is a control circuit, 7 is a speaker amplifier, 8 is a reset circuit, T is a transmitter, R is a receiver,
HS1 is hook switch, SPSW is speaker button, PO
W is power supply, SP is speaker, PC is photo coupler, R1
˜R7 are resistors, C1˜C3 are capacitors, and V is a power supply.

In FIG. 1, a hook switch HS1, a reset circuit 8, a photocoupler PC, a speaker button SPSW, a timer 4, a control circuit 6, which is located below the one-dot chain line,
The speaker amplifier 7, the speaker SP, and the resistors and capacitors forming these peripheral circuits form a speaker receiving circuit.

In the time chart of FIG. 2, HS1 indicates ON / OFF of the hook switch HS1 and RESET
Indicates the output of the reset circuit 8, SET indicates the input of the speaker button SPSW added to the SET terminal of the timer 4, OUT indicates the output from the OUT terminal, and SP indicates ON / OFF of the speaker receiving function.

The operation will be described by taking the case of making an outgoing call as an example in the embodiment of FIG.

Speaker button SP when the telephone is idle
When SW is pressed (Fig. 2 (A)), the earth potential is S on the timer.
Input to the ET terminal to activate the timer 4 and the resistance R
An output is produced at the OUT terminal for a time (T1 in FIG. 2) determined by the time constant circuit composed of 1, R2 and the capacitor C1, and the output is applied to the buffer 5 and the control circuit 6.

The output of the buffer 5 is applied to the dial circuit 2 to form a direct current loop for the outside line and display the transmission to the outside line.

On the other hand, the output of the control circuit 6 is applied to the speaker amplifier 7 to turn on the speaker receiving circuit (FIG. 2 (B)).

In this state, the signal sound from the outside line is applied to the speaker amplifier 7 through the rectifier circuit 1, the dial circuit 2 and the communication circuit 3 from the terminals L1 and L2 and is emitted from the speaker SP. That is, this state is the on-hook dial transmission state and the speaker receiving state.

After this state occurs, dial transmission is carried out with the on-hook, and if a calling signal is sent to the other party, the calling sound can be heard from the speaker SP.

Duration T of OUT terminal output of timer 4
1 is set so as to sufficiently cover the time from calling to dial transmission to answering the other party by pressing the speaker button SPSW. However, when the speaker button SPSW is pressed by mistake, the timer 4 is set after the time T1 according to the time constant has elapsed. Is turned off, the DC loop of the dial circuit 2 is opened via the buffer 5, and the external line is opened.

The handset is taken off at the timing of time T2 within the time T1 set by the time constant (by listening to the ringing tone or the voice of the other party from the speaker SP).
Then, the hook switch HS1 is turned off (Fig. 2
(C)) The reset circuit 8 generates a reset pulse and outputs its output via the photocoupler PC to the RES of the timer 4.
In addition to the ET terminal, reset the timer 4 (Fig. 2
(D)).

When the timer 4 is reset, the output of the OUT terminal is turned off, the control circuit 6 and the speaker amplifier 7 are turned off, and the speaker receiving function is turned off.

At this time, the output of the buffer 5 is also turned off, but the dial circuit 2 is held by another hook switch (a hook switch different from the HS1; not shown in FIG. 1) and in a call state.

Speaker button SP in a call state by the handset
When SW is pressed (Fig. 2 (E)), timer 4 is again OUT.
An output is generated at the terminal (FIG. 2 (F)), and in this case, the output is continued until the speaker button SPSW is pressed next time.

The output of the timer 4 turns on the speaker receiving circuit via the control circuit 6 and the speaker amplifier 7 by the same operation as in the case of the above-mentioned transmission to enable the speaker receiving while the call by the handset is continued.

Then, press the speaker button SPSW (see FIG. 2).
(G)) and the timer 4 are reset, the output of the OUT terminal is turned off (FIG. 2 (H)), and the speaker receiving circuit is turned off via the control circuit 6 and the speaker amplifier 7.

Thereafter, each time the speaker button SPSW is pressed in the talking state, the speaker receiving circuit is alternately turned on and off by the same operation as described above.

When the call ends and the handset is hung up, the hook switch HS1 is restored (FIG. 2 (K)), the reset circuit 8 generates a reset pulse, and this reset pulse is R
The timer 4 is reset to the initial state by being applied to the ESET terminal (FIG. 2 (L)). Dial circuit 2 is HS1
The hook switch contacts other than open the DC loop to the outside line, display the end call to the outside line, and return the telephone to the idle state.

In the case of an incoming call, the state in which the handset is raised in the case of the outgoing call is the same as the state in which the handset is raised in response to an incoming call. Therefore, by pressing the speaker button SPSW thereafter, the speaker is pressed. The receiving circuit alternately turns on and off, and accordingly, the speaker can be received alternately.

The termination is similar to the termination in the case of the outgoing call.

[0030]

As described above, according to the present invention, the speaker reception can be repeated by the operation of the speaker button while the communication state by the handset is maintained. Therefore, the convenience is improved and the operation is simplified and the communication by the erroneous operation can be performed. It is possible to prevent disconnection.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing an embodiment of the present invention.

FIG. 2 is a time chart of each part of the embodiment of the present invention.

[Explanation of symbols]

1 ... Rectifier circuit 2 ... Dial circuit 3 ... Communication circuit 4 ... Timer 5 ... Buffer 6 ... Control circuit 7 ... Speaker amplifier 8 ... Reset circuit SP ... Speaker HS1 ... Hook switch SPSW ... Speaker button

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[Procedure amendment]

[Submission date] August 11, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction content]

Speaker button SP when the telephone is idle
When SW is pressed (Fig. 2 (A)), the negative potential is input to the SET terminal of the timer to activate the timer 4, and during the time determined by the time constant circuit composed of the resistors R1 and R2 and the capacitor C1 (Fig. 2T1). An output is produced at the OUT terminal, and the output is applied to the buffer 5 and the control circuit 6.

 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Kei Kato 2223 Naganuma-cho, Isesaki-shi, Gunma Meisei Electric Co., Ltd. Isesaki Plant

Claims (1)

[Claims] 1. A speaker receiving circuit which is connected to a receiving path of a communication circuit and amplifies and outputs a received voice, and a speaker button constituted by a non-lock key and ON / OFF are controlled by the speaker button. It has a timer circuit and a control circuit for turning on / off the speaker circuit by setting / resetting the timer circuit.The timer circuit is set when the speaker button is first pressed in an on-hook state to perform a timing operation. Operation when started and reset by off-hook when the set time has elapsed or before the set time has elapsed, and when set and reset are alternately repeated by repeatedly pressing the speaker button in the off-hook state The timer circuit is set so that the Speaker receiver circuit of a telephone that is configured to be able to receive a call.