JP2680703B2 - Call waiting service simulation terminal device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a call waiting service simulation terminal device for simulating a call waiting service by a telephone of a subscriber.

[Conventional technology]

Recently, call waiting services have been provided due to the enhanced functions of telephone exchanges.

The call waiting service is a telephone when a call is received from another telephone (hereinafter referred to as a telephone C) to the telephone A during a call between two telephones (hereinafter referred to as a telephone A and a telephone B). This is a service that enables telephone calls between telephone A and telephone C while the line on the telephone network of B is held.

Figure 2 shows the details of the call waiting service. As shown in this figure, when the telephone A receives an incoming call from the telephone C in the state S1 during the telephone conversation between the telephones A and B, the telephone A hears the telephone ringing tone for several seconds. At this time, the state becomes the state S2 in which the telephone call between the telephones A and B is in progress and the line of the telephone network of the telephone C is held. By performing the hooking pulse operation on the telephone set A, the telephone state between the state S2 and the telephone set A-C and the state of the telephone set B
The state shifts to the state S3, which is a state in which is held. State S2 and state
In S3, if any of the telephones in the call goes on-hook, the line in the telephone network used to connect the telephones A, B, and C is released, and the call end state S4 is set.

To perform this service, an indication is required in the subscriber data of the exchange accommodating the subscriber line, indicating whether or not each subscriber is subscribed to the call waiting service. And, while telephone A and telephone B are talking,
When there is an incoming call from telephone C, the central processing unit of the exchange
Look up this display from the subscriber data for phone A. If this display indicates that the subscriber is subscribed, the central processing unit operates the call ringing tone generator while holding the line from the telephone C to send the ringing tone to the telephone A.

By the way, when the various communication services are sold, the convenience of the services cannot be conveyed only by explaining the contents of the communication services. Therefore, it becomes necessary for the customer side to experience the service. In order to experience the communication service, the customer goes to the installation location of the telephone that provides the service, and temporarily provides the service to the telephone owned by the customer. The idea is to perform a demonstration at the side house.

[Problems to be solved by the invention]

The above-mentioned proposals have the following problems.

(A) It is difficult to ask the customer who is provided with the service to go to the installation place.

(B) In order to temporarily provide the service, it is necessary to rewrite the subscriber data, which requires a great deal of labor.

(C) When the portable simulated experience device is used, it takes time to transport it to the customer's house, and again, a lot of labor is required.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to provide an apparatus for providing a pseudo call waiting service by connecting to a telephone not receiving the call waiting service via a telephone network. .

[Means for solving the problem]

The terminal device for simulating a call waiting service according to the present invention is a call connected to a transmission line and a reception line between a telephone body of a recommending side telephone connected to a customer side telephone via a telephone network through a telephone line and a handset. A terminal device for simulating weighting, which includes a hooking pulse detection unit that generates a switching instruction pulse by receiving a signal that is generated from the reception line and that is generated during a hooking operation of the customer side telephone, and a voice synthesis unit that generates a simulated voice. , A switching unit for alternately switching and connecting the handset and the voice synthesizing unit to the transmission line each time the switching instruction pulse from the hooking pulse detection unit is received; and a switch connected to the transmission line and pressing a switch. A ringing tone transmitting section for transmitting a ring tone during a call from the time until the hooking pulse is received from the hooking pulse detecting section; Characterized in that it comprises al.

〔Example〕

 FIG. 1 shows an embodiment of the present invention.

Here, the telephone body 11 is the body of the recommended telephone 2 connected to the telephone network through the subscriber line 20 (see FIG. 3). The handset 12 is a handset part of the recommending telephone set 2.

The hooking pulse detector 13 is a part that detects a hooking operation of the customer-side telephone 4 and sends a switching instruction pulse. The voltage detector 14 constantly monitors the state of the transmission line 22, and when the recommended telephone 2 goes off-hook, the transmission line 22
A reset pulse is sent in response to the voltage generated at 22. The ringing tone transmitting section 16 generates a signal having the same frequency as that of the ringing tone used in a call waiting service provided by the telephone network.

The switch unit 15 is a manual pushbutton switch 41 inside.
In response to the switching instruction pulse from the hooking pulse detection unit 13 and the reset pulse from the voltage detection unit 14, it is determined whether the sound transmitted from the ringing tone transmission unit 16 during a call is transmitted to the transmission line 22. . The voice synthesizing unit 18 is a part that utters a predetermined voice as a pseudo voice, and operates by receiving a voice instruction signal from the switching unit 17. The switching unit 17
Switching between the handset and the voice synthesizing unit is performed by the switching instruction pulse from the hooking pulse detection unit 13 and the switching instruction pulse from the voltage detection unit 14.

 The details of the switch unit 15 will be described below.

In FIG. 1, 41 is a push button switch, 42 is SR
A flip-flop, 43 is a switch circuit A, 44 is an OR circuit, and 45 is a DC voltage source.

The output Q1 of the SR flip-flop 42 is connected to the input C of the switch circuit A43. When Q1 is "1", the sides a and b of the switch circuit A43 are closed, and Q1 is "0".
At the time of, it becomes an open state. SR flip-flop 42
When the push button switch 41 is pressed, the input S becomes "1", and the output Q1 becomes "1". Further, when one of the two inputs of the OR circuit 44 becomes "1", the input R of the flip-flop 42 becomes "1", so that the output Q1 becomes "0".

 The details of the switching unit will be described below.

In FIG. 1, 51 is a bistable flip-flop, 52 is a switch circuit B, and 53 is a switch circuit C.

Each time a switching instruction pulse is applied to the input D of the bistable flip-flop, the output Q2 returns from "1" to "0" or "0" to "1". When a reset pulse is applied to this input R, the output Q2 becomes "0".

Further, from the output ▲ ▼, a logic output is always obtained, which is the reverse of the output Q2. Switch circuit B52 and switch circuit C
In 53, when the input C is "1", the sides a and b are closed,
When the input C is "0", the a side and the b side are open. The output ▲ ▼ of the flip-flop 51 is coupled to the input of the switch circuit C53. The output Q2 of the flip-flop 51 is
It is coupled to the input C of switch circuit B52. Also output Q2
When “0” is returned to “1”, the voice synthesis unit 18 determines that the voice instruction signal has arrived.

Details of the hooking pulse detector 13 will be described below.

FIG. 4 is a block diagram of the hooking pulse detector 13. Here, the amplification unit 62 is a circuit that amplifies the received call signal with an amplification factor that matches the attenuation amount of the telephone line to the customer side telephone (not shown in FIG. 4). The amplification factor of the amplification unit 62 is switched by the amplification changeover switch 65. The voltage comparison unit 63 compares the input from the amplification unit 62 with a predetermined reference voltage, and outputs "1" when the input from the amplification unit 62 exceeds the reference voltage and outputs "0" otherwise. Is.

The pulse width determination unit 64 is a circuit including an internal signal generation unit and an AND unit. The internal signal generation unit receives the signal from the voltage comparison unit 63 as an input, generates “0” as an internal signal from the time when the input changes from “0” to “1”, and outputs the signal for a predetermined time (determination time It is a circuit that generates "1" after the call. The AND section receives the signal from the voltage comparison section 63 and the signal from the internal signal generation section and generates "1" as a hooking signal at the hooking signal output terminal 67 only when both inputs are "1". Is.

Signal line for picking up the call signal to the receiving line 21 of the telephone 2 on the recommending side
66 is tied. The amplifier 62 receives a call signal through the call signal extraction signal line 66.

 Next, the operation of the hooking pulse detector 13 will be described.

First, it is assumed that the amplifying unit 62 receives a signal for hooking operation from the recommending telephone 2 as a call signal (see FIG. 5).

First, a desired amplification factor is set in the amplification unit 62 by operating the amplification changeover switch 65.

The input waveform of the voltage comparison unit 63 in this case is shown in FIG. The output pulse of the voltage comparison unit 63 at this time is as shown in FIG. 5 (b). The pulse width determination unit 64 receiving this pulse outputs "1" as the hooking signal output because the pulse width becomes longer than the determination time (Fig. 5 (c)).
reference). Here, before t _{1, the} two inputs of the AND section of the pulse width determination unit 64 are “1” and “0” (the previous number is the output of the internal signal generation unit, and the subsequent number is the voltage comparison unit 63). Corresponding to the output from). At time t ₁ , the output from the voltage comparison unit 63 becomes “1”, so that the output of the internal signal generation unit becomes “0”.
Therefore, the input of the AND unit at from t ₁ to t ₂ is "0", "1".

Further, the t ₂ after the determination time has elapsed since t _1, the output of the internal signal generator is changed to "1". As a result, a hooking signal output shown in FIG. 5 (c) is obtained from the AND circuit. This hooking signal output is used as a switching instruction pulse.

Next, a case where the amplifying unit 62 receives a voice signal as a call signal from the recommended telephone 2 will be described (see FIG. 6).

In this case, the voltage comparator when receiving through the amplifier
The input waveform of 63 is shown in FIG. The output pulse of the voltage comparison unit 63 at this time is as shown in FIG. 6 (b). Here, the width of the generated pulse is about 1/2 of the amplitude of the fundamental frequency component included in the voice most. The pulse width determination unit that has received this pulse outputs "0" as the hooking signal output because the determination time is set longer than the pulse width (see FIG. 6 (c)).

 The operation of this embodiment will be described below.

First, when the recommender raises the handset 12, the recommender's telephone 2 goes off-hook and a voltage is applied to the transmitter line 22 from an exchange in the telephone network. This voltage is detected by the voltage detection unit 14 and a reset pulse is sent to the switch unit 15 and the switching unit 17. The switch unit 15 receiving the reset pulse sets the output Q1 of the SR flip-flop 42 to "0" via the OR circuit 44, and the switch circuit A43 causes the call ringing tone sending unit 1
6 and the transmission line 22 are opened. In addition, the reset pulse is input R of the bistable flip-flop 51 of the switching unit 17.
Is input to Then, in response to the output of the bistable flip-flop 51, the switch circuit B52 is opened and the switch circuit C is opened.
53 is closed, and the transmission line 22 and the handset 12 (the part of the transmitter) are connected.

In this state, the recommender is connected to the customer side telephone through the telephone network by operating the ordinary telephone.

Subsequently, the recommender pushes the push button of the switch section 15 to set the output Q1 of the SR flip-flop 42 to "1" and the switch circuit A is closed. This allows the transmission line 22
And the ringing tone sending section 16 during a call are connected, and the customer telephone hears the ringing tone during a call.

The customer, who hears the ring tone during the call, performs a hooking operation on the customer's telephone. This hooking operation is detected by the hooking pulse detector 13 and a switching instruction pulse is sent out. This pulse is input to the input D of the bistable flip-flop 51 of the switching unit 17, and the output Q2 is returned to "1" and ▲ ▼ is returned to "0". As a result, the switch circuit B52 is closed and the switch circuit C53 is opened. This releases the connection between the transmitter line 22 and the handset 12 (only the transmitter part), and the transmitter line 22
And the voice synthesizer 18 are connected. At the same time as the switching unit
An output Q2 of the bistable flip-flop 51 instructs the voice synthesizer 18 to generate a pseudo voice. By these operations, the call between the customer side telephone and the recommender is switched to the pseudo voice.
Therefore, the customer side can experience a simulated experience of switching to a call with another telephone by performing a hooking operation during a call.

Then, when a hooking operation is performed on the customer side telephone, the hooking pulse detection unit 13 detects the hooking pulse and sends a switching instruction pulse. Switching unit that received this pulse
At 17, the output from the bistable flip-flop is returned.
As a result, the switch circuit B52 and the switch circuit C53 operate and the transmission line 22 and the handset 12 are connected. At the same time, the output Q2 of the bistable flip-flop becomes "0",
The voice synthesizer 18 is instructed to stop producing the pseudo voice.

Similarly, by performing a hooking operation on the customer side telephone, either the handset or the voice synthesizing unit is selected as a connection partner with the transmission line 22.

〔The invention's effect〕

As described above, according to the present invention, the call waiting service, which has been conventionally provided by using the function of the exchange, can be presented in a pseudo manner from the terminal.

Therefore, the customer side can easily experience the call waiting service, which is useful for recommending the sale of the service.

[Brief description of the drawings]

FIG. 1 is a configuration of an embodiment showing the features of the present invention. FIG. 2 is a state transition diagram showing a call waiting service. FIG. 3 shows a connection state in the telephone network for implementing the present invention. FIG. 4 is a block diagram of the hooking pulse detector. FIG. 5 is a timing chart (at the time of receiving a hooking pulse) showing the operation of the hooking pulse detector. FIG. 6 is a timing chart (at the time of receiving an audio signal) showing the operation of the hooking pulse detector. The main reference numbers in the figure are shown below. 1 …… Terminal device for simulating call waiting, 2 …… Telephone side of recommender, 11 ……
Phone main unit, 12 ... Handset, 13 ... Hooking pulse detector, 14 ... Voltage detector, 15 ... Switch, 16 ...
… Calling ring tone sending part, 17 …… switching part, 18 …… voice synthesizer, 21 …… listening line, 22 …… sending line

Claims (1)

(57) [Claims] 1. A terminal device for simulating a call waiting service, which is connected to a transmission line between a telephone body of a recommending telephone and a handset connected to a customer's telephone through a telephone network by a communication line and a receiving line. And a hooking pulse detection unit that generates a switching instruction pulse by receiving a signal that is generated from the reception line when the customer side telephone is hooked, a voice synthesis unit that generates a pseudo voice, and the hooking pulse detection unit. Every time a switching instruction pulse from the device is received, a switching unit that alternately switches and connects the handset and the voice synthesizing unit to the transmission line; and a hooking pulse detection that is connected to the transmission line and a switch is pressed. And a ringing tone transmitting section for transmitting a ringing tone during a call until a hooking pulse is received from the section. Terminal device for simulating the starting service.