JP2590296B2 - Voice call termination method for busy terminals - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Summary] The present invention relates to a voice call termination system for a dedicated telephone terminal connected to an extension of a switching device. The purpose is to provide two telephone lines and one control line between the telephone terminal and the switching equipment, and to connect the telephone terminal to a handset and an audio device, and to connect one of the two telephone lines to the handset or an audio device. A switching unit for switching whether to connect the other end of the communication line to the audio device or disconnecting the audio line, and a control unit connected to the control line for controlling the switching unit. The switching device holds state discrimination information including a call state of each telephone terminal, a use state of a handset, and a use state of an audio device, and discriminates a use state of the audio device of a destination telephone terminal based on the state determination information. Equipped with usage judgment means When a voice call request is received from the calling telephone terminal, the use state of the audio device of the destination telephone terminal is determined by the audio device use determining means. When the destination audio device is determined to be unused, the destination device is determined. A signal for controlling the switching unit is transmitted to the control line of the telephone terminal of the telephone line and the communication line is connected by the idle communication line, and the destination telephone terminal controls the switching unit by the control signal to disconnect the idle communication line. A voice call is received using the other communication line during a call by connecting to the audio device and connecting the other communication line during the call to the handset.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a voice call termination system in a dedicated telephone terminal connected to an extension of a switching device.

In recent years, in exchanges such as private branch exchanges (PBXs) and key telephones, extension of functions has been advanced, and accordingly, various services have been provided to terminals. As one of them, a voice call termination service (or a voice announcement service) is known in which a caller can make an announcement through a speaker before a partner terminal picks up and answers a call.

[Prior Art] FIG. 5 is a configuration diagram of a conventional example.

In the figure, reference numeral 50 denotes a key telephone or PBX switching device for providing a voice call service, 51 denotes a normal telephone terminal, and 52 denotes a telephone terminal having an interface unit 53 for calling a voice call (referred to as a dedicated telephone terminal). ).

Between the telephone terminals 51 and 52, a pair of communication lines and one control line (a control signal such as a dial signal at the time of calling and a telephone control signal at the time of receiving a call are transmitted between the telephone and the exchange device). Line for transmitting and receiving).

Here, when the telephone terminal 51 calls the telephone terminal 52 to perform the voice call service, the user of the telephone terminal 51 dials the key of the telephone terminal 52 (key operation) and further requests the voice call service. When you operate the key, the number information,
A signal representing a voice call is sent over the control line. The switching device 50 receives and decodes this, controls the connection of the telephone lines of the other party's telephone terminal 51 and the telephone terminal 52, and sends out an incoming call signal to the telephone terminal 52 via the control line. . On the other hand, the switching device 50 that has also received the signal for requesting a voice call transmits a control signal for instructing the voice call to the telephone terminal 52 via the control line. The interface unit 53 of the telephone terminal 52 generates a ringing tone or blinks a lamp when receiving a calling signal, and issues a switching instruction to the switching unit 54 when receiving a voice call control signal. The switching unit 54 switches the communication line to a speaker (and a microphone) provided separately from the handset in response to the instruction.

Thereafter, when a voice is emitted from the telephone terminal 51 on the calling side, the voice can be heard from the speaker without performing any operation (such as raising the handset or pressing the answer button) on the telephone terminal 52. . It should be noted that it is also possible to transmit sound via a microphone when sound is heard from a speaker.

Such a voice call service is used, for example, when notifying an executive telephone of a business from a secretary at a distant place, or simply calling for the purpose of giving an instruction.

[Problems to be Solved by the Invention] In the above-mentioned conventional voice call service, only one communication line is provided. Therefore, when the telephone terminal of the called party is already in a call, the voice call service is not provided. The problem is that the serviceability is reduced because of the inability to do so.

In addition, as a method for giving a voice notification during a call, conventionally, in addition to a normal telephone terminal, as shown in FIG. 5, an interphone device for connecting between an executive and a secretary is provided beside the telephone terminal. When an executive wants to make a voice notification from the secretary's telephone terminal during a call using his / her own telephone terminal, a method of contacting via an interphone was used. There was a problem that the device had to be installed.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a voice call termination system capable of performing an incoming call announcement service even during a talk of a called party.

[Means for Solving the Problems] FIG. 1 is a block diagram showing the principle of the present invention.

In FIG. 1, 1 is a telephone terminal, 2 is a switching unit, 3 is a control unit, 4
Denotes a handset, 5 denotes an audio device including a speaker and a microphone, 6 and 7 denote a pair of communication lines, 8 denotes a control line, and 9 denotes a switching device.

In the present invention, two pairs of communication lines are provided, and by controlling the switching of the communication lines, a voice call can be received even during a call.

[Operation] The user of the telephone terminal 1 uses the handset 4 to communicate with another telephone terminal (not shown) via the communication line 6 and the exchange device 9.
Assume that you are talking to At this time, when a call to this telephone terminal 1 as a destination is generated in the exchange device 9, the exchange device 9
The destination state determination means 10 identifies that the telephone terminal 1 is busy and that the telephone terminal has two sets of communication lines and allows voice call reception service during a busy state. At this time, when the calling terminal requests a voice call service by sending a specific signal, the voice call detecting means 11 detects the voice call service and sends an instruction to connect the call line on the calling side to the call line 7 to the connection control unit. A call connection instruction signal is transmitted to the control line 8.

When detecting the voice call connection instruction, the control unit 3 of the telephone terminal 1 supplies a switching signal to the switching unit 2. Switching unit 2
Thus, the communication line 7 can be connected to the audio device 5 and the sound from the telephone terminal on the transmitting side can be output to the speaker of the audio device 5. Thus, it is possible to provide a voice call to the user of the telephone terminal 1 during a call.

Further, the exchange device 9 is provided with an audio device use determining means 12 for judging whether or not the telephone terminal is talking on the speaker of the audio device 5. Wait for a call to become available to enable an incoming call or, if not available, notify busy.

[Embodiment] FIG. 2 is a block diagram of the embodiment, FIG. 3 is a processing flowchart of the embodiment, and FIG. 4 is another processing flowchart of the embodiment.

In FIG. 2, reference numeral 20 denotes a telephone terminal having a function of receiving a voice call during a call, reference numeral 21 denotes a handset (corresponding to the handset 4 in FIG. 1), and reference numerals 22 and 23 denote speakers and microphones (the acoustic device 5 in FIG. , 24 is a communication path switching unit (corresponding to the switching unit 2 in FIG. 1), 25 is a control unit, 26a and 26b are a pair of communication lines, 26c is a control line, and 27 is a plurality of telephone terminals. The exchange equipment accommodated, 28 is a network forming a communication path, 29 is a control device (CC), 30 is a memory (MM), 31a and 33a are communication lines, 31c and 33c are control lines, and 32 and 34 are telephones. Represents a terminal.

The operation of the normal voice call service when the telephone terminal 20 is not busy will be described below.

When the telephone number of the telephone terminal 20 is dialed from the telephone terminal 32, the dial information is transmitted via the control line 31c to the switching device 27.
Is sent to the control device 29. When the control device 29 receives this, analyzes and identifies it, the telephone terminal 20 via the control line 26c.
Is notified of the incoming call. When receiving the incoming call information, the control unit 25 notifies the incoming call by sounding a ringer (not shown) in the terminal or the like.

At this time, if there is a voice call announcement request (usually pressing a specific function button) from the telephone terminal 32, the control device 29 of the switching device 27 detects this. Then, the control device 29 connects the communication path (the communication line 31 on the calling side) to the network 28.
a and the communication line 26a on the receiving side, and the control unit 25 of the telephone terminal 20 is controlled by the communication line 26a and the speaker 2
2. Instruct the microphone 23 to be connected.

When the control unit 25 receives this, it issues an instruction to the communication path switching unit 24, and the communication path switching unit 24 turns the switch S1 to the speaker side to enable a voice call.
The announcement transmitted from 32 is output from the speaker of telephone terminal 20.

Next, the control operation of a voice call, including the case where the telephone terminal 20 is busy, will be described with reference to the processing flowchart of the embodiment shown in FIG.

First, it is assumed that the terminal 34 calls the terminal 20 while the telephone terminal (hereinafter simply referred to as a terminal) 20 is talking with the terminal 32 using the handset 21 or the speaker 22 and the microphone 23 (FIG. 30).
0,310). At this time, the control device 29 of the exchange determines whether the terminal is using the communication line 26a (line used for normal communication) by referring to the use state information stored in the memory MM30 (No. 320). . If it is not in use, a normal voice call reception is executed via the communication line 26a (at 330). In this case, an instruction is sent to the control unit 25 via the control line 26c in FIG. 2, and the control unit 25 controls to switch the switch S1 of the communication path switching unit 24 to the speaker 22 and the microphone 23.

If the communication line 26a is in use (at the time of talking) in the above step 320, it is determined whether the next communication line 26b is in use, and if so, a busy signal is sent to the terminal 34 (see FIG. 340,35
0) If not in use, a ringing sound (ringer) is transmitted from the network 28 to the terminal 20 (360 in the same case). Next, it is detected whether the calling terminal 34 has pressed the voice call button (function key) (370), and when the pressing is detected, the control device 29 sends the speaker 22 and the microphone 23 to the control unit 25 of the terminal 20. Call line 26
Instructs b to be connected (ibid. 380).

Subsequently, the control device 29 instructs the network NW to connect the communication line 33a and the communication line 26b (at 390), and the network NW makes the connection.
Instruct 24 to connect the communication line 26b, the speaker 22, and the microphone 23 (400, 410).

In response, when the call path switching unit 24 connects the switch s2, the calling terminal 34 can make an announcement to the speaker 22 and the microphone 23 (420 and 430).

In the above embodiment, the communication lines 26a and 26b and the control line 26c of the terminal 20 are physically separate lines.
The same operation is performed by a single line by multiplexing two voice signals and a control signal into digital signals and multiplexing (two of a plurality of channels are used for communication signals and one is used for control signals). Can be.

Note that two control lines 26c of the terminal 20 may be provided corresponding to the communication lines (two channels in the case of digitalization).

In the flow of the embodiment shown in FIG. 3, a voice call can be provided irrespective of the state of the talking terminal (during a call with the handset or during a call with the speaker). When a voice call arrives, 2
There may be a problem that two calls are mixed and cannot be distinguished.

Therefore, means for solving the problem will be described with reference to FIG.

 FIG. 4 is an explanatory view of another embodiment.

In FIG. 4, A. is the state discrimination information held in the memory MM of FIG. 2, and B. is the processing flow added to FIG.

In this embodiment, various state information is stored in the memory MM for each terminal as indicated by A.

That is, in the example of the figure, the terminal identification information (terminal number)
41, a flag 42 indicating a busy / empty state, a flag 43 indicating that the handset is in use / speaker is in use, and the number of speech lines is 2.
A flag 44 indicates whether there is a book or not (only one), and such information is updated in accordance with a control operation between the control device 29 of the switching device and the control unit 25 of each terminal.

In the case of the embodiment shown in FIG. 3, the identification information 41, the flag 42,
44 is used.

The processing flow using the stored information shown in A of FIG.
Shown in B. and described below.

First, in step 370 in FIG. 3, the terminal determines whether the voice call button has been pressed, and if YES, the process proceeds to step B. The terminal 20 determines whether the handset is being used. At this time, it is determined by looking at the flag 43 shown in FIG. 4A. If the handset is in use, the process returns to step 380 in FIG. 3 to receive a voice call, but the flag indicates that the speaker is in use. In this case, in step 372, a voice call request from the calling terminal is ignored, and a handset call is awaited or disconnected in the ringing sound listening state. Here, when the terminal 20 switches the call to the handset side,
The flow proceeds to step 370 in FIG.
3).

If the terminal 20 disconnects the call, the call from the calling terminal becomes a normal incoming call, and the terminal 20 displays the incoming call (at 375).

[Effects of the Invention] According to the present invention, a voice call can be further received by a terminal during a call, so that an improvement in serviceability can be achieved. In addition, it is possible to prevent a voice call from being received during a speaker call and to realize a voice call with excellent operability.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining the principle of the present invention, FIG. 2 is a block diagram of an embodiment, FIG. 3 is a processing flowchart of the embodiment, FIG. 4 is an explanatory diagram of another embodiment, and FIG. FIG. In Fig. 1, 1: Telephone terminal 2: Switching unit 3: Control unit 4: Handset 5: Sound device 6, 7: Two pairs of communication lines 8: Control line 9: Switching device

Claims (2)

(57) [Claims] In a voice call termination system for a telephone terminal connected to a switching device, two telephone lines and one control line are provided between the telephone terminal and the switching device, and the telephone terminal has a handset and an audio device. And a switching unit for switching between one of the two communication lines to be connected to the handset and the audio device, and for switching between the other of the communication lines to be connected to the audio device and to be disconnected. And a control unit connected to the control line and controlling the switching unit. The switching unit holds state discrimination information including a call state of each telephone terminal, a use state of a handset, and a use state of an audio device, and Sound device use determining means for determining a use state of the sound device of the telephone terminal based on the state determination information;
Upon receiving a voice call request from the calling telephone terminal, the use state of the audio device of the destination telephone terminal is determined by the audio device use determining means. If the destination audio device is determined to be unused, the incoming call is terminated. A signal for controlling the switching unit is transmitted to the control line of the previous telephone terminal to the control line, and the communication path is connected by the idle communication line. A voice call is received by using the other communication line during a call by connecting the other communication line to the audio device and connecting the other communication line during the call to the handset. Voice call termination method. 2. The communication system according to claim 1, wherein the communication signal and the control signal between the exchange device and the telephone terminal are digital signals, the two communication lines and the control line for controlling the terminal are time-division-multiplexed on one communication line. A method for terminating a voice call to a busy terminal, comprising a multiplexed signal.