JPH05236083A - System for switching speaker reception - Google Patents

Abstract

PURPOSE:To enable a telephone communication by means of a transmitter/ receiver with a called party even though a called party misses the switching operation to the transmitter/receiver when a call is originated in a speaker reception state and the callee replys to the call. CONSTITUTION:The system is provided with a response signal detection means 100. When transmitter/receiver 1 is disconnected, a call is originated in a state of connecting a speaker 2 and a called party answers the call, a response signal (the polarity inversion of the DC voltage supplied from the exchange to the subscriber line or stopping a calling sound during the return) returned through a subscriber line 20 from an exchange 30 is detected and the speaker 2 is automatically disconnected and the transmitter/receiver 1 is connected by the means 100.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker reception switching system in a telephone having a speaker for on-hook dialing.

As one of the functions of a telephone, a function of using a speaker without using a handset, making a call in a so-called speaker receiving state, and switching to a handset after the called party responds to start a call However, for example, it is put into practical use under the name such as an on-hook dial function.

Further, cordless telephones, which have been rapidly spreading in recent years, tend to have the above-mentioned on-hook dial function.

[0004]

2. Description of the Related Art FIG. 6 is a diagram showing an example of a conventional telephone. In FIG. 6, the telephone set 10 includes a handset 1, a speaker 2, a call circuit 3, a hook switch 4, a button section 5 and a control section 6, and an exchange 30 (not shown) via a subscriber line 20. It is housed in.

When a user (caller) of the telephone 10 uses the handset 1 to make a call, he / she operates a call button (TK) 52 provided on the button section 5 to control the control section 6.
Connects the handset 1 to the call circuit 3, disconnects the speaker 2 from the call circuit 3, sets the hook switch 4 to the conductive state, and connects the call circuit 3 to the subscriber line 20 so that the switch 30 is connected. On the other hand, the loop circuit 9 is formed.

The exchange 30 detects a call from the telephone 10,
When preparation for receiving the telephone number DN sent from the telephone 10 is completed, a dial tone D is sent to the telephone 10 via the subscriber line 20.
Send back T.

When the caller hears the dial tone DT from the handset (R) 11 of the handset 1, he / she operates the numeric buttons 53 provided on the button section 5 to call the telephone number D of the called telephone.
When N is selected, the control unit 6 controls the call circuit 3 to send the selected telephone number DN to the exchange 30 via the subscriber line 20 in the dial pulse format or the push button dial format.

The exchange 30 receives and analyzes the telephone number DN sent from the telephone 10, selects and seizes the called telephone, and sends a ringing signal RG to the called telephone.
Ringing tone RB is sent to the calling telephone set 10 via the subscriber line 20.
Send back T.

When the user of the called telephone (callee) who receives the call signal RG answers, the exchange 30 calls the call signal RG.
And the ringing tone RBT is stopped to be transmitted, and the communication path between the calling telephone 10 and the called telephone is completed, and the subscriber line 2
The polarity of the DC voltage supplied to the calling telephone set 10 via 0 is inverted.

After the calling tone RBT is stopped, the calling party listens to the answering call of the called party through the handset (R) 11 of the handset 1 and starts the call. Next, when the user of the telephone 10 uses the speaker 2 to make a call, when the speaker button (SP) 51 provided on the button unit 5 is operated, the control unit 6 causes the speaker 2 to communicate with the call circuit. 3 by disconnecting the handset 1 from the call circuit 3 into a so-called speaker receiving state, setting the hook switch 4 to the conductive state, and connecting the call circuit 3 to the subscriber line 20 so that the exchange 30 is connected. On the other hand, the loop circuit 9 is formed.

The exchange 30 detects a call from the telephone 10,
When preparation for receiving the telephone number DN sent from the telephone 10 is completed, a dial tone D is sent to the telephone 10 via the subscriber line 20.
Send back T.

When the caller listens to the dial tone DT through the speaker 2, the number buttons 5 provided on the button section 5 are called.
If you operate 3 and select the telephone number DN of the called telephone,
The control unit 6 controls the call circuit 3 and selects the selected telephone number D.
N is sent to the exchange 30 via the subscriber line 20 in the dial pulse format or the push button dial format.

The exchange 30 receives and analyzes the telephone number DN sent from the telephone 10, selects and seizes the called telephone, and sends a ringing signal RG to the called telephone.
Ringing tone RB is sent to the calling telephone set 10 via the subscriber line 20.
Send back T.

When the called party receives the ringing signal RG, the exchange 30 stops sending the ringing signal RG and the ringing tone RBT, and completes the communication path between the calling telephone 10 and the called telephone.

After the caller stops sending the ringing tone RBT, the calling party listens to the answering call of the called party through the speaker 2 and confirms the answering of the called party, and the speaker button ( When the SP) 51 or the call button (TK) 52 is operated, the control unit 6 disconnects the speaker 2 from the call circuit 3 and connects the handset 1.

Thereafter, the calling party uses the handset 1 to start a call with the called party. Here, since the caller hears the voice of the called party through the speaker 2, the caller misunderstands that the call can be transmitted.
Speaker button (SP) 51 or call button (TK)
If the user forgets to operate 52 and starts a call, the handset 1 is disconnected from the call circuit 3, so the voice of the calling party is not transmitted to the called party, and the called party answers. However, since the caller's voice cannot be heard, the call is abandoned.

[0017]

As is apparent from the above description, in the conventional telephone, the caller makes a call in the speaker receiving state and the handset 1 is switched to after the callee answers. If it is forgotten, the call cannot be made with the called party forever, so that the called party abandons the call, and there is a problem that the desired call cannot be made.

According to the present invention, when a call is made in a speaker receiving state and the called party answers, even if the calling party forgets to switch to the handset, a call by the handset with the called party is possible. The purpose is to

[0019]

FIG. 1 is a diagram showing the principle of the present invention. In FIG. 1, 10 is a telephone which is the subject of the present invention, 20 is a subscriber line that accommodates the telephone 10 in an exchange 30, 1 is a handset of the telephone 10, and 2 is a telephone 1.
0 is a speaker for on-hook dialing.

Reference numeral 100 is a response signal detecting means provided in the telephone 10 according to the present invention.

[0021]

The response signal detecting means 100 makes a call with the handset 1 disconnected and the speaker 2 connected, and when the called party answers, it is returned from the exchange 30 via the subscriber line 20. The response signal is detected, the speaker 2 is automatically disconnected, and the handset 1 is connected.

The response signal detecting means 100 is the exchange 3
It is considered that the polarity of the DC voltage supplied from 0 to the subscriber line 20 is inverted by the callee's response as a response signal, or the ringing tone returned from the exchange 30 is It is considered to detect the stop by the person's response as the response signal.

Therefore, when a call is made in the speaker receiving state and the called party answers, the speaker receiving state is automatically switched to the call state by the handset without any operation by the calling party. , The call with the called party can be started smoothly.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 2 is a diagram showing a telephone according to an embodiment of the present invention, FIG. 3 is a diagram showing an example of a speaker reception switching process in FIG. 2, and FIG. 4 is an example of a called party calling process in FIG. FIG. 5 is a diagram showing an example of the called party response detection process in FIG. 2, where FIG. 5 (a) shows the case of response detection by polarity reversal, and FIG. Each case of response detection is shown. The same reference numerals denote the same objects throughout the drawings.

In FIG. 2, a response signal detecting circuit 7 and a response detecting section 61 in the control section 6 are provided as the response signal detecting means 100 in FIG. Further, in FIG. 4, the calling side telephone and the subscriber line are respectively
_A and 20 _A , the called telephone and subscriber line are referred to as 10 _B and 20 _B , respectively.

2 to 5, when the telephone 10 is in the recovery state, the exchange 30 passes through the subscriber line 20 and the terminal L _{1 of the} telephone 10 is positive (+) and the terminal L ₂ is negative. (−) DC voltage is supplied (state ST in FIG. 4).
1).

In this state, when the user (caller) of the telephone set 10 _A uses the handset 1 to make a call, FIG.
The called party can be called and the call can be made in the same procedure as in the above.

Next, when the caller makes a call in the so-called speaker receiving state using the speaker 2, the speaker button (S
When P) 51 is operated, the control unit 6 connects the speaker 2 to the call circuit 3, disconnects the handset 1 from the call circuit 3, and sets the hook switch 4 to the conductive state.
To the subscriber line 20 _A , a loop circuit 9 _A is formed for the exchange 30.

The exchange 30 is the telephone 10_ADetected an outgoing call
And calling telephone 10_AReceiving the telephone number DN sent from
Subscriber line 20_ACalling phone via
Machine 10 _AThe dial tone DT is sent back to (state ST2 in FIG. 4).

Even in the state ST2, the polarity of the DC voltage supplied from the exchange 30 to the calling telephone set 10 _A is the same as that in the state ST1. When the calling party listens to the dial tone DT through the speaker 2, he / she operates the numeric buttons 53 provided on the button section 5 to set the telephone number D of the called telephone 10 _B.
When N is selected, the control unit 6 controls the call circuit 3 and sends the selected telephone number DN to the exchange 30 via the subscriber line 20 _A in the dial pulse format or the push button dial format (see FIG. 4 states ST3).

When the control unit 6 of the calling telephone set 10 _A has completed the calling operation using the speaker 2 (step S11 in FIG. 3), the call circuit 3 is controlled and the response signal detection circuit 7 is operated.
To the subscriber line 20 _A, and from the exchange 30 to the subscriber line 2
Observe that the called party's response signal is returned via 0 _A.

Even in the state ST3, the polarity of the DC voltage supplied from the exchange 30 to the calling telephone set 10 _A is the same as that in the states ST1 and ST2. Exchange 30, receives the telephone number DN sent from the calling station 10 _A-analyzing, selecting and acquisition of the called telephone 10 _B, and supplies the called telephone 10 _B via the subscriber line 20 _B The polarity of the DC voltage is inverted, the negative voltage (−) is supplied to the terminal L ₁ of the called telephone 10 _B , and the positive voltage (+) is supplied to the terminal L ₂ of the called telephone 10 _B, and the ringing signal RG is sent to the called telephone 10 _B. Then, the ring back tone RBT is returned to the calling telephone set 10 _A via the subscriber line 20 _A (state ST4 in FIG. 4).

Even in the state ST4, the exchange 30
Calling telephone 10_AThe polarity of the DC voltage supplied to
It is not different from the states ST1 to ST3. Receive call signal RG
Called telephone 10_BUser (callee) of
Then, the exchange 30 sends a ringing signal RG and a ringing tone RBT.
Stopped and again subscriber line 20 _ACalling phone 1 via
0_AThe polarity of the DC voltage supplied to the _A
Terminal L₁Negative electrode (-), terminal L₂Positive (+) DC
Supply voltage and subscriber line 20_BCalled via
Telephone 10_BThe polarity of the DC voltage supplied to
Restores the previous state, phone 10_BTerminal L₁Positive electrode
(+), Terminal L₂The negative electrode (-) DC voltage to the
Calling telephone 10_AAnd called telephone 10_BCall path to and from
Is completed (state ST5 in FIG. 4).

From the above, the exchange 30 is connected to the subscriber line 20 _A.
Two types of response signals (that is, the first is a response signal by polarity reversal of the DC voltage supplied to the subscriber line 20 _A and the second is a ringing tone RBT being returned) to the calling telephone set 10 _A via The response signal due to the stop of transmission will be returned.

Therefore, in order for the response signal detection circuit 7 in the calling telephone set 10 _A to detect the response signal due to the polarity inversion, the telephone number DN of the called telephone set 10 _B is sent as shown in FIG. 5 (a). after [FIG. 5 (a), the step S21), (positive electrode terminal L ₁ (+), negative electrode terminal L ₂ (-): the polarity of the DC voltage supplied to the subscriber line 20 _a from the switch 30 to monitor the [FIG. 5 (a), step S22], the polarity is [terminal L ₁
When the negative polarity (−) is detected and the positive polarity (+) is detected at the terminal L ₂ [FIG. 5 (a), step S23], the control unit 6 is notified that the response signal is detected [FIG. a), step S24].

Further, the response signal detection circuit 7 causes the ringing tone RB to
To detect the response signal by stopping T, as shown in FIG. 5 (b), after sending the phone number DN of the called telephone 10 _B [FIG. 5 (b), the step S31], subscriber from the exchange 30 The ring back tone RBT returned to the calling telephone set 10 _A via the line 20 _A is monitored [FIG. 5 (b), step S32], and when it is detected that the returned ring back tone RBT is stopped [FIG. b), step S33], and notifies the control unit 6 that a response signal has been detected [FIG. 5 (b), step S3
4].

Upon being notified of the detection of the response signal by the response signal detection circuit 7, the control unit 6 activates the response detection unit 61,
The called party answers and the calling telephone set 10 _A and the called telephone set 10 _B
The speaker 2 recognizes that the communication path has been set between
Is disconnected from the communication circuit 3 and the handset 1 is connected (steps S14 and S15 in FIG. 3).

Thereafter, the calling party (user of the telephone set 10) uses the handset 1 to start a call with the called party (step S16 in FIG. 3). As is clear from the above description, according to the present embodiment, when the caller makes a call in the speaker receiving state,
When the called party responds, the response signal detection circuit 7 outputs one of the above-mentioned two types of response signals (that is, a response signal by reversing the polarity of the DC voltage supplied to the subscriber line 20 _A , or a ring back tone RBT being returned). The response detection unit 61 automatically disconnects the speaker 2 from the call circuit 3 and connects the handset 1 to the call circuit 3, so that the caller can perform any operation. Instead, the handset 1 can normally start a call.

It is to be noted that FIGS. 2 to 5 are merely embodiments of the present invention, and the response signal detection circuit 7 is limited to, for example, one that detects either one of the above-mentioned two types of response signals. However, many other modifications such as detection of both of the above-mentioned two types of response signals are considered, but the effect of the present invention does not change in any case. Further, the telephone set that is the subject of the present invention is not limited to a cordless telephone set, and many variations such as a general telephone set are considered, but the effect of the present invention does not change in any case.

[0040]

As described above, according to the present invention, when a call is made in the speaker receiving state in the telephone and the called party answers, the caller does not perform any operation and the call is transmitted from the speaker receiving state. This automatically switches to the call state by the device, and the call with the called party can be started smoothly.

[Brief description of drawings]

FIG. 1 is a diagram showing the principle of the present invention.

FIG. 2 is a diagram showing a telephone according to an embodiment of the present invention.

FIG. 3 is a diagram showing an example of a speaker reception switching process in FIG.

FIG. 4 is a diagram showing an example of a called process of a called party in FIG.

FIG. 5 is a diagram showing an example of a called party response detection process in FIG. 2, in which FIG.
The figure (b) shows the case of response detection by stopping the ringing tone respectively.

FIG. 6 is a diagram showing an example of a conventional telephone.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Handset 2 Speaker 3 Call circuit 4 Hook switch 5 Button part 6 Control part 7 Response signal detection circuit 9 Loop circuit 10 Telephone 11 Handset (R) 12 Handset (T) 20 Subscriber line 30 Switch 51 Speaker button (SP) ) 52 call button (TK) 53 number button 61 response detection unit 100 response signal detection means

Claims (3)

[Claims] 1. A speaker (2) for on-hook dialing
In the telephone (10) equipped with the telephone, the handset (1) is disconnected, the call is made with the speaker (2) connected, and when the called party answers, the exchange (3)
Response signal detecting means (100) for detecting a response signal returned from 0) via the subscriber line (20) and automatically disconnecting the speaker (2) and connecting the handset (1).
A speaker reception switching system characterized by being provided. 2. The response signal detecting means (100) responds that the polarity of the DC voltage supplied from the exchange (30) to the subscriber line (20) is inverted by the response of the called party. The speaker reception switching system according to claim 1, wherein the speaker reception switching system is detected as a signal. 3. The response signal detecting means (100) detects, as the response signal, that the ring back tone returned from the exchange (30) is stopped by the response of the called party. The speaker reception switching system according to claim 1.