JPH01316048A - Digital telephone system - Google Patents

Abstract

PURPOSE:To prevent a voice message from being failed to be heard even when the message is conveyed through an abruptly interrupting cell by providing a control means which sends an interruption requesting command in accordance with the special operation of an interrupting call, displaying means, etc. CONSTITUTION:When an interrupting call is made from an arbitrary extension telephone set through a special dial number or function key, the control section 22 of an exchange 19 recognizes the call and controls a transmission control section 2a to send an interruption request processing command through a signal channel. When an interruption request is made while talking is made, namely, the exchange 19 tentatively stops the communication between terminals communicating with each other and causes voices from the interruption requesting telephone terminal to be transmitted to the interrupted telephone terminal through a data channel. At the interrupted telephone terminal, the voices are made to flow through the data channel after notifying the subscriber of the interruption by making interrupting displays through an LED lamp 10 and LCD display 11, when the interruption request is made. Therefore, a voice message can be prevented from being failed to be heard even when the message is made by an abrupt interrupting call.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention is a voice/data integration system that enables the transmission and reception of voice and data, and also enables an interrupt call from a third party during a call. Relating to a digital telephone system for communication.

(Prior Art) There is a digital telephone system for integrated voice and data communication that allows voice and data to be sent and received, and also allows an interrupt call from a third party during a call.

A conventional device of this kind had a configuration as shown in FIG. That is, in Fig. 2-, ■ is the main body of the telephone, which is equipped with a circuit for simultaneous voice and data communication, a circuit for listening to interrupt voice from a third party, etc., and 19 is a private branch exchange (P
25 is a data interface device.

The telephone main body 1 has functions such as multiplexing and disassembling each signal of a voice channel, a data channel, and a signal channel, as well as electrical matching with signal transmission with an exchange 19, for normal use and for interrupt use. Transmission control units 2a and 2b provided separately for each system
It is in charge of various overall controls in the S telephone body 1, and in the case of a signal control method using the exchange 19, the transmission control section 2a.

Based on the terminal control information obtained from the signal channel information decomposed in step 2b, the call control unit 5 and LED (light emitting diode)
Control of display 11 for character display using lamp 10 and LCD (liquid crystal display element), and asynchronous data terminal (
The control unit 3 sets the data transmission and reception conditions such as setting the communication speed for the processing unit L3a using the setting information from the DTP), and converts the PCM (pulse code modulation) signal of the audio channel decomposed by the transmission control unit 2a into an analog signal. Convert to D/A
It has an A/D converter that converts the analog signal from the converter and handset 8 into a PCM signal, and is further equipped with a predetermined bandpass filter to encode the audio signal and convert the coded signal into an audio signal. and codecs 4a, 4b provided separately for each interrupt system, an electrical interface with the handset 8, and the codec 4a.

4b, a call control unit 5 that interfaces with the other party's voice, an amplifier 7 that amplifies the signal so as to magnify and listen to the other party's voice and obtain a volume sufficient to listen to it from the speaker 12 when interrupted by a voice from a third party, and a handset 8 used for the call. , the above-mentioned key part 9 that has function keys for executing various functions, including dial keys for entering the telephone number of the other party when making a call and for various special number services, and the above-mentioned LED lamp for displaying the usage status of the own terminal. 10. The above-mentioned display 11 that displays the call status and message information, the speaker 12 that magnifies and listens to incoming call display (ringer ringing), DT (dial tone) sound during off-hook dialing, and interrupt voice, transmission control unit 2a, The communication speed of the signal of the data signal channel decomposed in step 2b is determined by the communication speed of the asynchronous data terminal, and the data signal transmission/reception processing unit 13a1, which has the function of electrically matching with the asynchronous data terminal, is the physical interface with the asynchronous data terminal. Connector 14a1 Transmission transformer LEA, 16B that performs transmission between exchange 19 and telephone body 1
, a switching unit 6 for selecting either one of the □ output of the codec 4a and the output of the codec 4b and providing the selected output to the speaker 12. The telephone main body 1 is equipped with a data terminal 15a such as a personal computer that has a procedure (known as a haze command) that allows switching between communication mode and command mode by operating the terminal keypad and is connected to the connector 14a.
You can connect via.

17 is a transmission path between the exchange 19 and the telephone main body 1, and 18 is a transmission path provided between the exchange 19 and the telephone main body 1 for use in interrupting by a third party's voice.

The exchange 19 performs exchange processing between central office lines, leased lines, etc. and a plurality of extension terminals, and 20a is the exchange 19 that sends voice signals from each digital telephone main body 1 and data signals from each asynchronous data terminal. This is the PCM Highway within. In addition to this, the exchange 19 also has a time switch 21.
, transmission control units 2c, 2d.

2e, control unit 22, telephone interface 23c +'
23d.

23e etc. Among these, the time switch 21 forms a communication path between extensions and between a central office line and an extension while switching on a time-division basis, and the control unit 22
It performs various controls necessary for exchange operations, such as controlling the transmission control units 2c and 2d and the time switch 21, and controlling terminals according to the call status, and receives requests for interrupt calls based on special numbers and function key operations. An interrupt call is made to the other party's telephone. Phone interface 2
3c, 23d.

23e is an interface unit for analog telephones including standard telephones, and is composed of a codec, a power supply circuit, and the like. Further, 24 indicates that the control unit 22 is connected to the transmission control unit 2.
This is a call control bus for controlling the telephone and time switch 21.

The data interface device 25 is for connecting a data terminal L5b such as a personal computer to the exchange 19, and is used to interface with the difference in communication method (communication speed and procedure) between the exchange 19 and the asynchronous data terminal. It is composed of a signal transmission/reception processing section 13b, a transmission control section 2f, a transmission transformer 16f, a control section 27, and the like. Among these, the data signal transmission/reception processing section 13b is the transmission control section 2
Converts the communication speed of the data signal sent and received by f and the communication speed of the asynchronous data terminal to the communication speed of the transmission control unit 2e, converts it to the communication speed of the asynchronous data terminal, and electrically matches the asynchronous data terminal. It is something that takes. In addition, the transmission control section 2f decomposes the received frame into a B2 channel which is a data signal channel, a D channel which is a control signal channel, and others, and provides them to the data signal transmission/reception processing section 13b, and also sends data etc. from the data signal transmission/reception processing section 13b. 16f is a transmission transformer.

The control unit 27 is in charge of overall control of the data interface device 25, and when the exchange 19 and the data interface device 25 are connected using a signal control method using the exchange 19, information on signal channels decomposed by the transmission control unit 2f is transmitted. It performs connection processing with an asynchronous data terminal based on the terminal control information obtained from the terminal control information, and also performs communication speed conversion processing with an asynchronous data terminal.

213c, 213d, 2Be are analog telephone terminals including standard telephones, and are telephone interface units 23c, 23d, 23 of the exchange 19.
It is connected to the exchange 19 via e.

FIG. 3 is a diagram showing a frame structure for simultaneous voice and data communication. In the figure, 51 is a frame synchronization bit for synchronizing data transmission, and 52 is an audio signal channel ( It is hereinafter referred to as the B1 channel (64.kbps) and has an 8-bit configuration. Further, 53 is a data signal channel (hereinafter referred to as B2 channel (64k bps) to which data signals are assigned).
)), which is also an 8-bit configuration. A signal channel 54 (hereinafter referred to as D channel (16 kbps)) to which a control signal is assigned is composed of 2 bits. A parity pit 55 is used for retransmission control when an error occurs in the information of the entire frame, and here it is composed of one bit.

In such a configuration, for example, for the telephone main body 1,
Consider a call made from an arbitrary extension telephone 26c. In this case, the exchange 19 establishes an exchange connection based on the dial data from the extension telephone 28c. Then, the voice from the extension telephone 26c is transmitted to the standard telephone interface section 23.
After being A/D converted and converted into a digital signal by c, the PCM highway 2 on the standard telephone side is controlled by the control unit 22.
0b, is exchanged by the time switch 21, and is transferred to a predetermined time slot on the PCM highway 20a of the telephone main body 1 under the control of the control section 22. The digital signal carried in a predetermined time slot on the PCM highway 20a is transmitted to a predetermined transmission control section 2 to which the telephone main body 1 is assigned under the control of the control section 22.
B1 channel (52 in FIG. 3) in the data format shown in FIG.
2 channel (53 in Figure 3), D channel (54 in Figure 3), etc., and is multiplexed with the transmission transformer 16c.
and is sent to the telephone main body 1 via a transmission line 17.

The telephone body 1 receives this via a transmission transformer 16a. The signal received by the telephone main body 1 is again decomposed into a voice signal and a data signal by the transmission control unit 2a, the voice signal is D/A converted by the codec 4a, and adjusted to a predetermined voice level by the call control unit 5, and then sent to the handset. 8 reaches the receiver.

In addition, the call voice from the telephone body 1 is adjusted to a predetermined level by the call control unit 5, A/D converted by the codec 4a, and transmitted to the transmission control unit 26 for B2 channel (data signal), D channel (control signal), etc. The signals are multiplexed together and sent to the exchange 19 via the transmission line 17 via the transmission transformer 18a. The audio received by the exchange 19 is again decomposed into the old channel, 82 channel and D channel by the transmission control unit 2C, and the 131st channel and 92nd channel are placed in a predetermined time slot, and the time switch 21
The exchange operation is carried out under the control of the control unit 22 at B1.
The channel is P on the digital telephone interface side.
CM/\Iway 20a is placed in a predetermined time slot.

The voice signal taken out from a predetermined time slot under the control of the control unit 22 is D/A converted by the codec of the analog telephone interface 23c, adjusted to a predetermined level, and then sent to the extension telephone 2 via an analog transmission line.
[Sent to fc. Then, it is output as voice by the receiver of the handset.

On the other hand, data communication between the data terminal 15a connected to the telephone body 1 and any data terminal 15b connected to an extension is, for example, when data is transmitted from the data terminal 15a to the data terminal 15b, first the data terminal 15a The data is speed-converted by the transmission/reception processing unit], 3a, and multiplexed with the B1 channel, D channel, etc. by the transmission control unit 2a. Then, the exchanger 1 via the transmission transformer 16a
Sent to 9th. In the exchange 19, the transmission control section 2c decomposes the received data into the B1 channel, B2 channel, and D channel again, and the B1 channel and 82 channel are transmitted to the PCM on the digital telephone interface side.
The vehicle is placed on the highway 20a at a predetermined time slot. Then, the time switch 21 exchanges the channel 82, and the 82 channel is connected again to the PC on the digital telephone interface side.
The transmission control unit 2 rides on a predetermined time slot of the M highway 20a and is connected to the data interface device 25.
e under the control of the control section 22. Here, it is multiplexed with the B1 channel, D channel, etc., and sent to the data interface device 25 via the transmission transformer IGe. In the data interface device 25, the received data is sent to the transmission control unit 2f again via the Bl channel, B2.
The B2 channel is subjected to speed conversion and electrical level conversion in the data signal transmission/reception processing section 13b, and then sent to the data terminal 15b via the connector 14b of the data interface device 25. The terminal 15b displays characters and figures on its own CRT display and performs data communication.

Similarly, data from the data terminal 15b is sent to the connector 14b.
is sent to the data interface device 25 via the data signal transmission/reception processing section 13b, where it is electrically level converted, multiplexed at the transmission control section 2f, and transmitted to the transmission transformer 1lli.
It is sent to the transmission control section 2e of the exchange 19 via f'.

Then, the transmission control unit 2e selects the B1 channel again, 82
Decomposed into channel and D channel, transmission control unit 2
b is placed in a predetermined time slot on the PCM highway 20a on the digital telephone side to which it has been assigned under the control of the control section 22, and when the time switch 21 is replaced under the control of the control section 22, the transmission control section of the telephone main body 1 is placed again. 2b. The transmission control section 2b multiplexes the signal with the B1 channel, D channel, etc., and sends it to the transmission control section 2a of the telephone body 1 via the transmission transformer 16c11[ia. In the telephone body 1, the received multiplexed signal is decomposed by the transmission control section 2a under the control of the control section 27, and the B2 channel is guided to the data signal processing section 13a, where it is subjected to speed conversion and electrical level conversion. The data is then sent to the data terminal 15a via the connector 14a.

The received data is then displayed in characters, graphics, etc. on the CRT display of the data terminal 15a.

Assume that while the above-mentioned simultaneous voice and data communication is being performed, a call is made to the telephone main body 1 from an arbitrary extension telephone, for example, the extension telephone 28d. Naturally, in this case, since the telephone is busy, a busy tone is transmitted from the exchange 19 to the extension telephone 26d.

However, since interrupt calls are possible, the extension telephone 26
Suppose that an interrupt call is made using the special number dial or function key from d. By dialing a special number or operating a function key from the extension telephone 2Bd, the exchange 19 learns of the interrupt call request from the extension telephone 26d, and operates to allow the interrupt call system of the telephone body 1 to receive the transmitted voice from the extension telephone 28d. do.

In this case, the transmitted voice from the extension telephone 26d is A/D converted by the analog telephone interface 23c, and the control unit 22 controls the voice in a predetermined time slot on the PCM highway 2Ob of the analog telephone to which the analog telephone interface 23c is assigned. (Accordingly, the telephone is loaded, exchanged by the time switch 21, placed in a predetermined time slot on the highway assigned for the interrupt voice, and transmitted by the control section 22, which is assigned for the interrupt voice of the telephone main body 1. The transmission controller 2d multiplexes the channels together with 82 channels, the D channel, etc., and sends the transmission transformer 1.[id
, 18b to the interrupt voice transmission control section 2b of the telephone main body 1, where the Bl channel, 82
channel and D channel. And the old channel is D/A with codec 4b of the interrupt audio system.
The signal is converted, passed through the switching unit 6, and amplified to a predetermined level by the amplifier 7, and the speaker 12 issues an interrupt notification and transmits a call.

Here, the switching unit 6 switches between the exchanges 19-15 based on information given from the special number and function keys from any telephone 20d.
Switching is performed by the control section 3 of the telephone main body 1 giving a switching control command in response to a control signal sent from = via the D channel of the telephone 1.

(Problem to be solved by the invention) In this way, in the voice/data integrated communication system,
A data terminal can be connected to a digital telephone, and normal voice and data can be communicated using the normal voice and data communication system.In addition, a system for interrupting calls is provided, and special numbers and function keys can be used to communicate during a call or data. This system allows an interrupt call from a third party to be made during communication. However, since digital telephones have a system for interrupt calls that is separate from the system for normal voice and data communication, the telephone body 1 has two transmission control units 2 and 2.
a, 2b, and a separate codec etc. As a result, the telephone body 1 becomes larger and the price increases, and furthermore, in order to connect such a telephone to the exchange 19 side, the transmission control section for connecting to the terminal must be used for two lines. First, compared to the case where terminals such as ordinary telephones and data terminals are connected, the transmission control unit is occupied more than the other terminals, resulting in problems such as a decrease in system efficiency.

Therefore, in order to solve this problem, a digital telephone system with the configuration shown in Figure 4 was proposed that enables interrupt calls without providing a system for interrupt calls separate from the normal voice/data communication system. .

This prior art will be explained below with reference to FIG. FIG. 4 is a block diagram showing the configuration of this device, which is basically the same as the conventional example explained in FIG. Here, in contrast to the configuration of the conventional example explained in FIG.
On the side, when an interrupt special number is dialed or a function key is operated, an interrupt request processing command is issued to temporarily stop data transmission between the telephone main unit 1 which is the called party and the telephone or data terminal which is the communication partner. channel, and the voice data from the interrupt requesting telephone that dialed a special number or operated a function key for the interruption is transmitted to the telephone main body 1, which is the called party, on the data signal channel, that is, the B2 channel. The control unit 22 has a function of controlling the transmission control unit 2c connected to the telephone body 1, and the telephone body 1 does not have the conventional transmission control unit 2a.
, 2b, the transmission control section 2b is abolished, and instead, when the transmission control section 2a receives an interrupt request processing command from the D channel, when the audio signal data is interrupted, the data output from the transmission control section 2a is The data extracted from the signal channel is given to the codec 4b, and normally the transmission control unit 2a
The difference is that a B22 channel switch 29 is provided for switching the data extracted from the data signal channel outputted by the B22 channel to the data signal transmission/reception processing section 13.

Incidentally, when the interrupt requesting telephone goes off-hook, there is no interrupt request processing command on the D channel, so that the telephone main body 1 returns to the original talking state.

In such a configuration, under normal conditions, the phone body 1
The 82 channel switching section 29 switches the data extracted from the data signal channel output from the transmission control section 2a to the data signal transmission/reception processing section 13, so that when making a call between the telephone main body 1 and, for example, an extension telephone 26c, it is possible to make a call between the telephone main body 1 and, for example, an extension telephone 26c. The operation is exactly the same. Further, data communication between the data terminal 15a connected to the telephone main body 1 and the data terminal 15b, for example, connected to an extension, is also the same as before. In addition, when making an interrupt call using a special number dial or function key (a key assigned the same function as the special number dial) from an arbitrary extension telephone 26d, for example, the special number dial or function key information from the arbitrary extension telephone 26d can be used to call the exchange 19. The control unit 22 recognizes this as an interrupt request to the telephone, and controls the transmission control unit 2a to send an interrupt request processing command to the D channel, and to transmit the audio signal of the interrupt requesting telephone to the B2 channel. Control. Therefore, the B2 channel switching section 29 on the telephone main body 1 side sends the B2 channel output output from the transmission control section 2a to the codec 4b on the speaker 12 side, and the control section 3 on the telephone main body 1 side transmits the B2 channel output output from the transmission control section 2a. It has a function of controlling the switching unit 6 to select either the output from the call control unit 5 or the output from the codec 4b based on the output of the D channel.

An exchange 19 performs data communication between data terminals 15a and 15b.
The data terminal uses the D channel from Data communication between the data terminal 15a and the data terminal 15b connected to the data interface device 25 is interrupted.

Here, the "communication mode" is a mode in which a data signal channel is used between the data terminal 15a connected to the telephone main body 1 and the data terminal 15b connected to the data interface device 25 connected to an arbitrary extension. In addition, "command mode" is a state in which data transmission and reception on the data signal channel between the data terminals 15a and 15b is interrupted, and each data terminal can be treated as an independent terminal device. state the condition.

When an interrupt request is received in this way, in the exchange 19, the voice from the arbitrary extension telephone 26d is A/D converted by the telephone interface 23c for analog telephones, and the analog telephone to which the extension telephone 26d, which is an analog telephone, is assigned. It is placed in the time slot of the side PCM/% Iway 20b under the control of the control unit 22, and is replaced by the time switch 21 to the position where data communication was being performed. Then, it is placed on the time slot of the PCM highway 20a on the predetermined digital telephone side to which the telephone body 1 is assigned, and is taken out to the transmission control section 2C under the control of the control section 22, and is multiplexed as the B2 channel with the B1 channel, D channel, etc. , transmission transformer 16C2le
a to the transmission control section 2a of the telephone main body 1.

And here, Bl channel, B2 channel, D
broken down into channels.

In the telephone body 1, the B2 channel switching section 29 and the speaker switching section 6 are switched in advance to the codec 4b side for interrupt communication based on the received interrupt request information on the D channel, and the audio on the B2 channel is switched to the D/D channel by the codec 4b. A
After being converted, it is amplified by the amplifier 7 via the speaker switching unit 6, and is applied to the speaker 12. As a result, the speaker 12 outputs the audio from the extension telephone 2Bd that has issued the interrupt.

The same applies even when the telephone main body 1 is not performing data communication, and when processing an interrupt request, the voice from any extension telephone 26d is transmitted to the analog telephone interface 2.
PCM highway 2 on the analog telephone side to which extension telephone 2 [1td is assigned]
PCM highway 2Oa on the digital telephone side to which the time slot on 0b is boarded under the control of the control unit 22, exchanged by the time switch 21, and the telephone body 1 is assigned.
It is taken out to the transmission control section 2b under the control of the control section 22 executing interrupt request processing, multiplexed with 81 channels, D channels, etc., and transmitted from the transmission transformer 16c to the transmission path 17. ．． The signal is sent to the transmission control section 2a of the telephone main body 1 via the transmission transformer 18a, where it is decomposed into the Bl channel, B2 channel, and D channel. The B2 channel switching unit 29 has been switched to the codec 4b side for interrupt calls in advance due to the previous interrupt request, so the audio on the B2 channel is D/A converted by the codec 4b and then sent to the speaker switching unit 6.
The signal is amplified by the amplifier 7 and sent to the speaker 12, so that the speaker 12 outputs the voice from the extension telephone 2[id that caused the interruption.

In the configuration shown in Fig. 4, when an interrupt request is made during a call, the exchange temporarily suspends data between the call terminals, puts the voice from the telephone terminal that made the interrupt request on the data channel, and outputs the interrupt light. When an interrupt request is received on the optical telephone terminal, the data channel is used and the voice is transmitted from the speaker, so there is no need to set up a special line for interrupt calls as in the past. Therefore, since the exchange can connect as many terminals as the number of lines it accommodates, it is possible to improve the efficiency of the system and reduce the cost of the system.

However, on the telephone terminal that accepts the interruption, a voice is suddenly interrupted from the speaker during a call, and messages from the other party are broadcast one-sidedly, making it impossible for you to communicate with the other party. As a result, messages are often overlooked. Also, when the data terminal 15a is connected and communicating, suddenly,
There is a problem where communication is cut off.

Therefore, an object of the present invention is to display this interruption on the telephone terminal when a voice message is interrupted from the speaker, so that the user on the called side can know in advance that the interruption will occur. ,by this,
To provide a digital telephone system which prevents a voice message from a called party from being missed due to a sudden interruption.

(Means for Solving the Problems) In order to achieve the above object, the present invention is configured as follows. That is, the terminals are exchanged and connected according to the dial information, voice signals are assigned to the voice signal channel, and data are assigned to the data signal channel for data transmission, and special operations preset by the calling side telephone terminal are performed. an exchange having an interrupt call service function that executes an interrupt call to the called party's telephone during a call when a call is made;
It has a digital telephone terminal that is connected to this exchange and has an interrupt call function that performs a preset special operation from another telephone terminal during a call to interrupt the telephone that is currently on a call, and transmits voice and data. In a digital telephone system that is capable of making and receiving calls, and is also capable of implementing an interrupt call service from another telephone when the telephone is busy, the switching equipment receives a call from the called party during a call when a special operation for interrupting the call is performed from the telephone terminal of the calling party. a control means for issuing an interrupt request command to the telephone set to temporarily stop data exchange with the other party's telephone; and upon receiving the interrupt request command, transmitting voice data from the calling telephone terminal that performed the interrupt call operation using the data signal channel; and a means for transmitting the data to the called telephone during a call, and the digital telephone terminal includes a switching means for switching an output route of the data of the data signal channel in the received data, and a display means for indicating the occurrence of an interrupt. and control means for controlling the switching means so that the output thereof is sent to the voice communication system when an interrupt request command is given, and controlling the display means for displaying the display means.

(Function) In such a configuration, when the calling telephone terminal performs a special interrupt call operation on the digital telephone terminal during a telephone call, the control means of the switching equipment interrupts the telephone terminal on the called telephone terminal during a telephone call. A request command is given to temporarily stop data exchange with the other party's telephone. Further, upon receiving an interrupt request command, the transmission means of the exchange transmits voice data from the calling telephone terminal that performed the interrupt call operation to the called telephone terminal that is in the middle of a call using the data signal channel. This - time stop command causes the digital telephone terminal to stop communicating with the other party's telephone, and also controls the switching of the output path of the data of the data signal channel in the received data to be sent to the voice communication system. At the same time, display control of the display means is performed. The display by this display means allows the user on the called side to know in advance that an interrupting voice message will be received, and to prepare for the call. When the exchange receives an interrupt request, it obtains a voice signal from the telephone terminal that issued the interrupt request, and transmits this to the called telephone through a data signal channel, so that the called telephone receives the interrupt request command. As a result, the control means switches the output of the switching means to be sent to the voice communication system, and as a result, the voice message from the telephone terminal that has issued the interrupt request will flow from the voice communication system.

In this way, the telephone terminal is provided with a switching means for switching and outputting the data signal channel data to the voice communication line in response to an interrupt request, and a display means for providing an interrupt display in response to an interrupt request. Communication between telephone terminals during a call is stopped in response to an interrupt request, and a voice signal from the telephone terminal requesting the interrupt is transmitted to the called telephone terminal of the destination of the interrupt request through a data signal channel, so that the interrupt is displayed by the display means. This system allows the voice from the interrupt request telephone terminal to be sent to the called telephone terminal after notifying the called party, eliminating the need for a line for interrupting calls and allowing the switchboard to accommodate the calls. In a telephone system that can connect as many terminals as possible to the number of lines possible and improves system efficiency, it will no longer be possible to miss voice messages due to sudden interruptions, dramatically improving usability. become.

(Example) An example of the present invention will be described below with reference to FIG. FIG. 1 is a block diagram showing the configuration of this device, which is basically the same as the prior art described in FIG. 4.

In the prior art, in contrast to the configuration of the conventional example explained in FIG.
On the exchange 19 side, when there is an interrupt special number dial or function key operation, an interrupt request processing command is issued to temporarily stop data transmission between the telephone main body 1, which is the called party, and the telephone or data terminal which is the communication partner. is sent to the D channel, and the voice data from the interrupt requesting telephone that dialed the interrupt special number or operated the function key is sent to the telephone main unit 1, which is the called party, on the data signal channel, that is, the B2 channel. The control unit 2 has a function of controlling the transmission control unit 2c connected to the telephone body 1 so that
2, the telephone main body 1 includes a conventional transmission control section 2a,
2b, when the transmission control section 2b is abolished and the transmission control section 2a receives an interrupt request processing command from the D channel, the data signal output by the transmission control section 2a when the audio signal data is interrupted. Although the B2 channel switching unit 29 is configured to provide data extracted from the channel to the codec 4b and switch to provide the data extracted from the data signal channel normally output by the transmission control unit 2a to the data signal transmission/reception processing unit 13. The present invention is further provided with a function of controlling lighting or blinking of the LED lamp 10 for indicating the occurrence of an interrupt when an interrupt request command is given to the control section 3a of the main body IA of the telephone. In addition, the control unit 3a receives the output from the call control unit 5 and the codec 4b using the D channel output output from the transmission control unit 2a.
When the switching unit 6 is controlled to select one of the outputs, there is no interrupt request processing command on the D channel, so the telephone main body IA returns to the original talking state.

In such a configuration, under normal conditions, the phone main body I
The B2 channel switching section 29 in A is the transmission control section 2a.
Since the data extracted from the data signal channel output by the telephone is switched to be supplied to the data signal transmission/reception processing section 13, the operation is exactly the same as in the conventional case when a telephone call is made between the telephone main body IA and, for example, the extension telephone 213c. Furthermore, data communication between the data terminal 15a connected to the telephone main body IA and the data terminal 15b, for example, connected to the extension line, remains the same as before.

For example, when making an interrupt call using a special number dial or function key (key assigned the same function as the special number dial) from any extension telephone 28d, any extension telephone 26
Switchboard ■9 using the special number dial or function key information from d.
The control unit 22 recognizes this as an interrupt request to the telephone, and controls the transmission control unit 2a to send an interrupt request processing command to the D channel, and to transmit the audio signal of the interrupt requesting telephone to the B2 channel. to control. Therefore, the B2 channel switching unit 29 on the phone main body IA side sends the B2 channel output output from the transmission control unit 2a to the codec 4b on the speaker 12 side, and also sends the B2 channel output output from the transmission control unit 2a to the codec 4b on the speaker 12 side.
The A-side control unit 3a controls the switching unit 6 to select the output of the codec 4b instead of the output from the call control unit 5 using the D channel output output from the transmission control unit 2a.

An exchange 19 performs data communication between data terminals 15a and 15b.
Using the D channel, the data terminal gives interrupt request information to the control section 3a or control section 27 of the telephone main body IA or the data interface device 25, as if the data terminal had performed an operation to switch from communication mode to command mode,
- the data terminal 15a of the telephone body IA or the data terminal 15b connected to the data interface device 25;
interrupt data communication. At this point, if the data terminal during communication suddenly stops, there is a problem in terms of man/machine, so please use the application software of the data terminal to
The display will show [This will be interrupted for a while due to an interruption.]
It is conceivable to display guidance such as this to measure the improvement of man-machine skills. Furthermore, in response to the interrupt request command, the control section 3A of the telephone main body IA controls the LED lamp 10 to turn on or blink, thereby giving advance notice that a voice message will be received using the side stick.

Further, this may be displayed on the LCD display 11, and a combination thereof may also be considered.

Here, "communication mode" is a mode in which a data signal channel is used between the data terminal 15a connected to the telephone body IA and the data terminal 15b connected to the data interface device 25 connected to an arbitrary extension, and data Also, "command mode" refers to a state in which data transmission and reception on the data signal channel between the data terminals 15a and 15b is interrupted so that each data terminal can be treated independently or as a terminal device. Refers to the state.

When an interrupt request is received in this way, the exchange 19 notifies the user of the called telephone terminal of the interruption in advance, and then transmits the voice from the arbitrary extension telephone 26d to the analog telephone telephone interface 23c. It is A/D converted, placed on the time slot of the PCM highway 20b on the analog telephone side to which the extension telephone 28d, which is an analog telephone, is assigned under the control of the control unit 22, and placed in the position where data communication was being performed using the time switch 21. and get on the time slot of the PCM highway 20a on the side of the predetermined digital telephone to which the telephone main body IA is assigned.
B is taken out to the transmission control unit 2c under the control of the control unit 22, and
It is multiplexed with the B1 channel, D channel, etc. as two channels, and sent to the transmission control section 2a of the telephone main body IA through the transmission transformers 16c and lea. Then, it is decomposed into a Bl channel, a B2 channel, and a D channel.

In the telephone main body IA, the B2 channel switching unit 29 and speaker switching unit 6 are switched in advance to the codec 4b side for interrupt communication based on the received interrupt request information on the D channel, and the audio on the B2 channel is switched to the D/D channel by the codec 4b.
After being A-converted, it is amplified by the amplifier 7 via the speaker switching section 6, and is sent to the speaker 12. As a result, the speaker 12 sends an interrupt notification with the voice from the extension telephone 2 [id] that issued the interrupt. Become.

The same is true even when the telephone main unit IA is not performing data communication, and when processing an interrupt request, the voice from any extension telephone 26d is A/D converted by the analog telephone interface 23d, and the extension telephone 26d is assigned. PCM Highway 2O on the analog phone side
The controller 22 enters the time slot on the PCM highway 2Oa on the digital telephone side, which is exchanged by the time switch 21 and is assigned to the telephone body 1, and executes the interrupt request process. It is taken out to the transmission control section 2b under the control of the control section 22, multiplexed with the B1 channel, D channel, etc., and sent from the transmission transformer 1[ic to the transmission path 17. It is sent to the transmission control section 2a of the telephone main body 1 via the transmission transformer 16a, where it is transmitted to the 131 channel, B2 channel, D
broken down into channels. The B2 channel switching unit 29 has been switched to the codec 4b for interrupt calls in advance due to the previous interrupt request, so the audio on the B2 channel is D/A converted by the codec 4b and then passed through the speaker switching unit 6. Since the signal is amplified by the amplifier 7 and sent to the speaker 12, the speaker 12 issues an interruption notification using the voice from the extension telephone 26d that issued the interruption.

By the way, if a microphone is provided in the main body IA of the telephone, it becomes possible to talk to the other party who interrupts the call at the time of interrupt.

When an interrupt request is made during a call in this way, the exchange temporarily stops communication between the terminals currently communicating, transmits the audio from the telephone terminal that made the interrupt request to the data channel to the telephone terminal to which the interruption is to be made, and then interrupts the call. When there is an interrupt request at the destination telephone terminal, 1. ED lamp lO or LCD display 11
After notifying the user by displaying an interrupt message, the data channel is used to play the voice, so the user on the receiving side can know in advance that there is an incoming message due to an interruption, and the user can receive the message. Since the system is ready to listen to messages, it is possible to prevent the user from missing an incoming message due to sudden interruption. Also, audio/
Even if data communication is in progress, data communication can be evacuated in advance.

It should be noted that the present invention is not limited to the embodiments described above and shown in the drawings, but can be implemented with appropriate modifications within the scope of the gist thereof.

〔Effect of the invention〕

As described in detail above, according to the present invention, even if there is a voice message due to a sudden interrupt call, it will not be missed, and therefore, the user-friendly digital telephone can make more effective use of the interrupt call function. system can be provided.

[Brief explanation of the drawing]

Figure 1 is a block diagram showing an embodiment of the present invention, Figure 2 is a book diagram showing the configuration of a conventional device, Figure 3 is a diagram showing the frame structure of data to be transmitted, and Figure 4 explains the prior art. FIG. 1, IA...Telephone body, 2a, 2b, 2c...
-Transmission control unit, 3. 3a, 22--control unit, 4
a, 4b-coop tsuku, 6... speaker switching section,
12...Speaker, 13...Data transmission/reception processing unit, 1
5a, 15b...De-1 terminal, 19...Switching machine,
28...Analog telephone interface, 25...
Data interface location, 2Bc, 2Bd, 2[
ie...Extension telephone, 29...B2 channel switching unit. Applicant's agent Patent attorney Takehiko Suzue 15b 1 statue

Claims (1)

[Claims] The terminals are exchanged and connected according to dial information, and the voice signal is assigned to the voice signal channel and the data is assigned to the data signal channel for data transmission. An exchange has an interrupt call service function that performs an interrupt call on the called party's telephone during a call when a special operation is performed, and the exchange is connected to this exchange and executes a special operation set in advance from another telephone terminal during a call. This is a digital telephone terminal that has a digital telephone terminal with an interrupt call function that allows an interrupt call to be made to the telephone during a call, and is capable of transmitting and receiving voice and data, as well as being able to implement an interrupt call service from another telephone when the telephone is busy. In the telephone system, the switching equipment includes a control means for issuing an interrupt request command to a called telephone during a call to temporarily stop data exchange with the called telephone when a special operation for an interrupt call is performed from a calling telephone terminal. , means for transmitting voice data from the calling telephone terminal that performed the interrupt call operation to the called telephone terminal during the call using the data signal channel upon receiving an interrupt request command; The terminal includes a switching means for switching the output route of the data of the data signal channel in the received data, a display means for indicating the occurrence of an interrupt, and when the interrupt request command is given, the output of the switching means is sent to the voice communication system. 1. A digital telephone system comprising: control means for controlling switching so that the information is displayed on the display means;