JPH04215355A - Interruptive call response system - Google Patents

Abstract

PURPOSE:To offer an interruptive call response system for an exchange provided with a call waiting function. CONSTITUTION:A voice synthesis circuit 17 which synthesizes and outputs prescribed voice guidance is provided at the exchange provided with the call waiting function, and when a call signal is inputted from the subscriber of a telephone set 6 to the exchange 1 while the subscriber of a telephone set 5 performs speech with the subscriber of a telephone set 4, a call is detected at a speech detection circuit 16, and an incoming tone is outputted to the subscriber of the telephone set 5, and also, the speech detection circuit 16 outputs a startup signal to the voice synthesis circuit 17. The voice synthesis circuit 17 transmits desired voice guidance to the subscriber of the telephone set 6 by synthesizing and outputting the prescribed voice guidance by an inputted start-up signal, and performs desired voice response to an opponent. Thence, the speech with the subscriber of the telephone set 4 can be held by performing the hook operation of the telephone set 5, etc., by the subscriber of the telephone set 5, and the speech with the subscriber of the telephone set 6 can be performed in place of that.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interrupt call response system in an exchange having a call waiting function.

0002

[Prior Art] In conventional subscriber telephone services,
Exchange services are being implemented that have call waiting functions such as interrupt call response.

[0003] This call waiting function is as follows. When a subscriber receives an interrupt call from another subscriber's telephone C while a subscriber is talking on telephone A (phone A and telephone B are talking), the receiver of telephone A receives a call from the other subscriber's telephone. You can hear a signal tone (ringtone) indicating that there is an interrupt call. Additionally, a ring tone is returned to the telephone C that made the call during that time. Then, when the subscriber of telephone A performs a predetermined operation such as hooking, he can talk to the subscriber of telephone C who made the call. Further fixing returns the call state to the original subscriber of telephone B. For example, NTT (Nippon Telegraph and Telephone Corporation) calls such a subscriber telephone service "Call Waiting" and implements it.

0004

[Problem to be Solved by the Invention] However, in the above-mentioned subscriber telephone service, until the handset of telephone A is put down and the hook is turned on once, telephone C receives a ringing tone, and when the telephone C tries to make a call, The subscriber of telephone C on the receiving end thinks that the subscriber of telephone A is away, even though the subscriber of telephone A is actually away, and hangs up the handset of telephone C, and there is an urgent call. The disadvantage was that we could not contact each other at any time.

[0005] The present invention has been made in view of the above-mentioned problems, and its purpose is to provide a subscriber telephone service of an exchange having a call waiting function, in which the subscriber of the telephone on the calling side makes a mistake. It is an object of the present invention to provide an interrupt call response method for an exchange or the like that responds to messages without making judgments.

[0006]

[Means for Solving the Problems] In order to achieve the above object, the present invention improves an exchange having a call waiting function by providing a call detection means and a message output means.

[0007] That is, when a first telephone and a second telephone are talking through an exchange, when an interrupt call signal is input from the third telephone to the first telephone, the exchange In the interrupt call response method of an exchange having a call waiting function, which outputs the information to the first telephone and allows a call to be made between the first telephone and the third telephone by a hook operation of the first telephone. , call detection means for detecting a call between the first telephone and the second telephone;
It has a message output means for outputting a predetermined message signal, and when the first telephone and the second telephone are talking, an interrupt call signal from the third telephone to the first telephone is input to the exchange. In this case, the call detection means detects the interrupting call signal, activates the message output means, and makes a desired message response to the third telephone based on the message signal outputted by the message output means. It is characterized by

[0008]

[Operation] According to the present invention, a call detection means and a message output means are provided in an exchange having a call waiting function such as an interrupt call response, so that a call can be made between a first telephone and a second telephone. If an interrupt call signal from the subscriber of the third telephone is input to the exchange during the call, the call detection means of the exchange outputs a ring tone to the subscriber of the first telephone, and further outputs a ring tone to the subscriber of the third telephone. A message is output to the subscriber of the third telephone who made the interrupt call.
Recognizes the existence of the subscriber of the first telephone, and then the subscriber of the first telephone who receives the call operates the hook of the telephone to make a call to the subscriber of the third telephone who made the interrupt call. I can do it.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a preferred embodiment of the interrupt call response method according to the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram for explaining this interrupt call response system using an exchange as an example. In the figure, 1 and 2 are exchanges, 3 is a terminal, and 4 to 6 are telephones. Exchange 1
The CPU 11, the main memory circuit 12, the call path memory 13, the subscriber line circuit 14, the outgoing trunk 15, and the call detection circuit 16
A specific example of the message output means is a speech synthesis circuit 17. The message output means may also be a means for outputting character information.

In FIG. 1, exchanges 1 and 2 are digital exchanges having similar functions, and a CPU 11 has a central function of controlling call paths, trunks, etc. based on programs stored in a main memory circuit 12. Main memory circuit 1
2 stores exchange connection programs and exchange control information;
The communication path memory 13, which is exchanged with the U11, is a memory circuit that temporarily stores digitized communication signals and performs rereading to establish an exchange connection. accommodating lines of CODE
It has a C (COder DECoder) that performs A/D conversion and D/A conversion, as well as monitoring the status of telephones and calling subscribers. Outgoing trunk 15
A call detection circuit 16 detects calls between subscriber telephones, generates a ring tone for a call from a subscriber line of another exchange, and generates an activation signal to a voice synthesis circuit 17.

FIG. 2 is a block diagram of an embodiment of the speech synthesis circuit 17. As shown in FIG. In the figure, reference numeral 171 stores voice characteristic parameters corresponding to the desired voice guidance for the telephone 6 of the subscriber who makes an interrupt call, and reads them out by the readout control circuit 17 according to the activation signal from the call detection circuit 16.
4 outputs a read signal, and 172 reads out the stored data in response to the read signal;
1. A synthesis circuit that synthesizes a digital signal corresponding to original speech by performing synthesis using an autoCORrelation method, a formant synthesis method, a speech unit synthesis method, etc.
73 is a D/A conversion circuit that D/A converts the digital signal output from the synthesis circuit 172 to obtain an analog original audio signal. Several desired voice guidance contents are stored in advance, and when a call activation signal is input, the stored voice guidance is output.

Next, the operation of FIG. 1 will be explained using the operation flowchart of FIG. When subscriber A of telephone 5 and subscriber B of telephone 4 make a call (step 31), call detection circuit 16 detects this call (step 32). This call detection circuit 16 monitors whether there is a call to subscriber A on telephone 5 from another subscriber (step 33). If no call is detected, step 3
1 and step 32 are continued. However, when a call from another subscriber is detected in the call detection circuit 16, a ring tone is generated, and this ring tone is output to the telephone set 5 via the subscriber line circuit 14, and the call is called to the subscriber A who is currently talking. (
Step 34). The call detection circuit 16 outputs an activation signal to the voice synthesis circuit 17 to activate it at the same time as the ringtone is generated (step 35). The voice synthesis circuit 17 outputs the pre-stored voice guidance (for example, "Connecting now, please wait for a while"), and sends the voice guidance to the subscriber line circuit 14, the communication path memory 13, the outgoing trunk 15, and the other party's exchange. 2 to subscriber C of telephone 6 (step 36). Upon hearing this voice guidance, subscriber C of telephone 6 recognizes that subscriber A of telephone 5 is currently talking to another subscriber, and decides whether to wait a little longer or call again later. Next, subscriber A of telephone 5, who received the ringtone, calls the subscriber who is calling him (telephone 6).
It is determined whether or not to talk to subscriber C) (step 37
), as long as the call with subscriber B of telephone 4 cannot be interrupted, steps 34 to 37 are repeated, and if it is desired to talk to subscriber C of telephone 6 who called,
Turn on/off the hook of telephone 5 (step 38)
, the call with subscriber B on telephone 4 is temporarily put on hold (step 39). In this way, subscriber A on telephone 5 can talk to subscriber C on telephone 6 (step 40
). Determine whether to continue the call (step 41),
To end the call, press subscriber A's phone 5 off the hook.
When the call is turned N/OFF (step 42), subscriber A of telephone 5 can again talk to subscriber B of telephone 4 who was on hold (step 43). In this way, a subscriber telephone service having a call waiting function such as an interrupt call can be realized.

As described above, the subscriber of the telephone 6 hears the ring tone while the subscriber of the telephone 5 is talking, recognizes that the subscriber of the telephone 5 is not present, and calls the telephone 6. If the subscriber on telephone 5 is on the phone without disconnecting the telephone, listen to the desired voice guidance and call telephone 5.
The subscriber on the telephone 5 and the subscriber on the telephone 6 can talk to each other by recognizing the presence of the subscriber and operating the hook on the telephone 5, thereby making it easier to make reliable contact.

In the above embodiment, the voice guidance outputted by the voice synthesis circuit 17 was used as an example of the message output means, but recently when using a digital telephone connected to an ISDN line, text input to the telephone is Since it has a function of displaying information, it may be a means for responding with character information from a message output means using this display function.

Furthermore, although the exchange 1 has been described as a digital exchange that is exchanged and connected using a communication path memory, it can also be implemented as an analog type exchange that is exchanged and connected using a communication path switch.

Furthermore, although a voice synthesis circuit that performs digital signal processing is used as a means for making a voice response, the present invention is not limited to such a means, and it is also possible to record the desired voice guidance on a magnetic tape or the like in advance. It is also possible to have the tape record automatically played back and output when it is called up.

[0018]

[Effects of the Invention] As described above, the present invention provides the following effects.

That is, by providing a call detection means and a message output means in an exchange having a call waiting function,
When you are on a call, you respond to a call interruption from a third party by transmitting a desired message signal, informing the third party of your presence, and causing the third party to mistakenly believe that you are not present. You can prevent it from happening.

[0020] Therefore, when a third party calls a subscriber of another telephone who is currently talking, it becomes easier to make reliable contact.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a voice response system of an exchange according to the present invention.

FIG. 2 is a block diagram of the speech synthesis circuit shown in FIG. 1.

FIG. 3 is an operation flowchart of the block diagram shown in FIG. 1;

[Explanation of symbols]

1-2 Exchange machine 4-6 Telephone

Claims (1)

[Claims] Claim 1: When a first telephone and a second telephone are talking through an exchange, when an interrupt call signal is input from the third telephone to the first telephone, the exchange In the interrupt call response method of an exchange having a call waiting function, which outputs the information to the first telephone and allows a call to be made between the first telephone and the third telephone by a hook operation of the first telephone. , comprising a call detection means for detecting a call between the first telephone and the second telephone, and a message output means for outputting a predetermined message signal, during a call between the first telephone and the second telephone, When an interrupt call signal from a third telephone to the first telephone is input to the exchange, the call detection means detects the interrupt call signal and activates the message output means, and the third telephone An interrupt call response system characterized in that a desired message response is performed based on the message signal outputted by the message output means to the telephone set.