JPS61212942A - Data exchange system - Google Patents

Abstract

PURPOSE:To simplify the system constitution by sending a tone signal and communication data from a data exchange, and a terminal connector to discriminate whether the sent signal is the tone signal or the communication data to apply output control. CONSTITUTION:The data exchange 3 sends a tone signal representing the exchange operating state to a terminal connector 2 during the data communication between a data terminal device 1 and the data exchange 3. Simultaneously, the control signal representing that the transmission data is the tone signal is sent. A line interface 2b of the terminal connection device 1 receives the data, the tone signal is shared to the a voice circuit 2c by a selector 2d and the communication data is shared to the terminal interface 2a under the control of the control section 2e through the control signal. Since the tone data is managed by the data exchange, the control burden of the terminal connector is decreased. Further, the tone signal communication channel is omitted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a data exchange system in which the switching operation status of a data exchange can be easily detected on the data terminal side.

[Technical background of the invention and its problems]

When constructing office systems, data exchange systems are being adopted for the purpose of improving the productivity of office operations and reducing system costs.

This data exchange system connects a plurality of data terminals to a data exchange through respective terminal connection devices, performs data communication with the data exchange, and exchanges and controls the communication data with the data exchange. It is.

Conventionally, however, on the data terminal side, exchange operations during data exchange processing such as outgoing calls, incoming calls, and other party's calls, as well as confirmation of the status thereof, have been performed exclusively on the display set on the data terminal under the control of the terminal connection device. This is done using a device. For this reason, the data terminal operator cannot leave the data terminal or the terminal connection device and engage in other work, which is also a factor in reducing the efficiency of office work. In addition, since the terminal connection device performs the control, this leads to a decrease in the connection processing efficiency of the communication line between the data terminal and the data exchange, and as the various service functions of the exchange increase, the display control of the status itself There was a risk that this would become quite complicated.

Therefore, each terminal connection device is provided with a tone data communication function and an audible sound transmission function according to the tone data, and the above-mentioned various exchange operation statuses are displayed audibly to improve the work efficiency of terminal operators. is considered. However, in order to do this, the configuration of each terminal connection device becomes complicated and its cost increases, and the tone data must be reset for each terminal connection device each time a service function is added or changed. A problem has arisen, such as the need to do so.

In addition, in order to send tones from the data exchange to the terminal connection equipment at any time, it is necessary to provide a signal channel separate from the data transmission channel with a data transmission rate sufficient to communicate in the telephone voice band of 300 to 3400 fiz. This led to the complexity of the data exchange system configuration.

[Purpose of the invention]

The present invention has been made in consideration of these circumstances, and its purpose is to provide a data exchange system that can audibly display the switching operation status, etc., without complicating the system configuration. It is about providing.

[Summary of the invention]

The present invention connects a plurality of data terminals to a data exchange via terminal connection devices, and transmits communication data digitally transmitted between the data exchange and each data terminal via the terminal connection devices. In a data exchange system in which exchange is controlled by an exchange, a tone signal indicating the status of data exchange control is sent to the data exchange,
Means for transmitting digital data in place of the communication data by utilizing vacant communication data transmitted between the data exchanger and the data terminal, and for sending out information indicating the type of the transmission data as a digital transmission control signal. On the other hand, the terminal connection device determines whether the transmission data transmitted from the data exchange is communication data or a tone signal according to the received digital transmission control signal, and determines whether the transmission data transmitted from the data exchange is communication data or a tone signal according to the result of this determination. When the transmission data is communication data, the transmission data is output to the data terminal, and when the transmission data is a tone signal,
The present invention is characterized in that a tone generating circuit comprising a D/A converter or the like is provided with means for outputting the transmission data.

〔Effect of the invention〕

Thus, according to the present invention, a communication channel for performing data communication between a terminal connection device connected to a data terminal and a data exchanger is used, and the exchange operation is performed from the data exchanger using an empty communication channel. A tone signal indicating the status, etc. is transmitted, and the terminal connection device side determines whether the received data is communication data or a tone signal from the received digital transmission control signal and controls its output. Display control of audible sounds indicating operating status etc. can be easily and effectively performed on the data exchange side.

Moreover, since various tone data are managed on the exchange side, there is no control burden on the terminal connection device, and tone data can be easily added or changed when adding service functions. In addition, there is no need to add a new communication channel between the data exchange and the terminal connection device, and it is possible to improve communication control efficiency by simplifying the configuration of the terminal connection device itself, which simplifies the system configuration. and equipment cost 1
This has great practical effects, such as making it possible to reduce the amount of water used.

[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic configuration diagram of a data exchange system according to an embodiment. This data exchange system connects a plurality of data terminals 1 (la, ~in) to each terminal connection device 2.
(2a, to 2n) connected to the line circuit 4 of the data exchange II3. This data exchanger 3 includes the above-mentioned line circuit 4, a 1-to-crank path 5 to which office lines and the like are connected, a tone circuit 6 for generating various 1-to-tone signals (tone data) indicating switching operation status, etc., and a plurality of tone circuits. A time switch circuit 8 connects conference circuits 7 and the like that control conference calls between telephone terminals to each other via a PCM highway, a control section 9 that controls the exchange operation thereof, and an operation timing of the data exchange 3. The device is equipped with a clock generator 10 and the like that generates a specified clock signal. The time switch circuit 8 exchanges and controls data communicated with the plurality of data terminals 1. The exchange control unit 9 is connected to the data bus in the exchange 3 via l109a, and transmits and receives data to and from the line circuit 4 etc. according to the exchange program stored in the ROM 9b, thereby controlling the time switch circuit 8. , a CPC 19c that controls the exchange operation, a RAM 9d that appropriately stores data transmitted and received with the line circuit 4, etc., and an l10 to which a terminal for maintaining and managing the exchange 3 is connected.
9e etc. And these CPU9c
, ROM 9b, etc. are interconnected via an internal bus, and mutually transmit and receive necessary data.

Further, the terminal connection device 2 is schematically connected to the data terminal 1 as shown in FIG.
A terminal interface 2a that transmits and receives data between the data exchanger 3 and a line interface 2b that is connected to the line circuit 4 of the data exchanger 3 via a communication line and performs data communication with the data exchanger 3. The terminal interface 2a and the line interface 2b are connected to relay data communication between the data exchange 3 and the data terminal 1, and also when the data communication [1-- signal is sent from t3, It is comprised of a selector 2d that selects and outputs the information to the audio circuit 2c, and a control section 2e that controls the operation of this terminal connection device M2.

In the data exchange system configured as described above, the present invention transmits a tone signal indicating the switching operation status etc. to the exchange 1 side by utilizing the data communication gap between the data terminal 1 and the data exchanger 1@device 3. and transmits it to the terminal connection device 2 side, and also transmits as a control signal that the transmission data is a tone signal, and the terminal connection device 2 determines that the transmission data is a 1-tone signal according to the control signal, and determines this. It is designed to be output to the audio channel 1B2c. Thus, unlike the conventional system, the terminal connection device 2 does not need to perform control processing according to the exchange operation state, and without creating a new communication channel for transmitting tone signals, the exchange operation state can be changed. It becomes possible to display the corresponding 1-tone signal as an audible sound.・The details will be explained below with reference to FIGS. 3 to 11.

FIG. 3 is a block diagram of the terminal connection device 2 in the embodiment system, M4 is a block diagram of the m acid amount of the line circuit 4, and FIG. 5 is a block diagram of the time switch circuit 8.

As shown in FIG. 3, the terminal connection device 2 includes a dial pad 11 for inputting dial information, etc., and function keys 12 for selecting and specifying various service functions. Further, 2e is a control unit for the terminal connection device 2, which is composed of a microprocessor or the like. The dial pad 11 and the function keys 12 are connected to the internal bus 13 connected to the control device 2e via l1014.15, respectively, and peripherals that control the data terminal 1 connected to the terminal connection device 2 are connected to the internal bus 13. A still signal transmitting buffer 17 and a control signal receiving buffer 18 are connected to control the various transmission/reception control data transmitted and received between the control unit 15 and the data exchanger 3. The control device 2e sends and receives various control signals to and from each of these circuits via the internal bus 13 to control their operations. Further, as described above, the terminal interface 2a to which the data terminal 1 is connected is controlled by the control device 2e via the internal bus 13, and performs data communication with the data terminal 1.

On the other hand, the transmission system interface in this terminal connection device 2 is configured as follows. The transmission frame register 21 receives the data inputted from the data terminal 1 via the interface 2a and stored in the data transmission buffer 22, and the control signal stored in the control signal transmission buffer 17, as shown in FIG. 7, for example. like 11
Transmission data is created in a predetermined frame formant format that constitutes one frame. In Fig. 7, F is a 1-bit frame synchronization signal, D is 8-bit communication data, C is 1-bit control data, and P is 1 bit.
This is bit parity. The control data C is one data represented by several bits that is sequentially cut out from the control signal transmission buffer 17 one bit at a time and inserted into each frame. For example, as shown in FIG. One piece of control information is formed by the control data Co, CI, to C11. The transmission gate circuit 23 transmits the transmission data multiplexed in this manner to the data exchange 1 under the control of the transmission clock circuit 24 and the gate control circuit 25.

Data communication between the terminal connection device 2 and the data exchanger 3 is performed by converting data consisting of, for example, an NRZ signal sequence into a diphasic signal, and transmitting the data between the data exchanger 3 and the terminal via a hybrid circuit as illustrated in FIG. The data is connected to the connecting device 2, and data is sent and received alternately at a cycle of 125 μsec, as shown in FIG. 9, for example, so-called ping-pong transmission (two-wire bidirectional burst transmission). In addition, Fig. 11 shows N
It is a figure showing the relationship between an RZ signal (a) and a diphase signal (b).

The gate control circuit 25 performs such ping-pong transmission (
This function prevents collisions between transmit frames and receive frames in two-wire bidirectional burst transmission.
The transmission timing of the transmission frame and the reception timing of the reception frame are controlled in synchronization with a clock signal from 6 and under the control of a reception timing circuit 21 described below.

The data (reception frame) transmitted from the data exchange IAta3 is taken in via the reception gate circuit 28 and set in the reception frame register 29. At the same time, the received frame signal is sent to the clock synchronization detection circuit 30.
is input. This synchronization detection circuit 30 detects the frame synchronization signal F in the received frame, and detects the synchronization timing of the transmission system from the synchronization detection period and the like. The synchronous reception clock circuit 31 generates a reproduction clock for the reception frame signal by the reception gate circuit 28 in accordance with this detected synchronization timing.

The control signal C among the received frame signals stored in the received frame buffer 29 is transmitted to the control signal receiving buffer 7.
18 and one control signal is formed as shown in the above-mentioned figure M8, and then given to the control device 2e,
It is used for controlling its operation.

Further, the communication data D stored in the reception frame buffer 29 is transferred to the data reception buffer 32, and then inputted to the reception data sorting circuit (selector 2d) 33, under the control of the peripheral control section 16. It is selectively output to the terminal interface 2a and sent to the data terminal 1 via the terminal interface 2a, or it is selectively output to the codec/buffer 7 amplifier 34 (audio circuit 2c), and from the buffer amplifier 34 to the speaker. An audible sound is output via 35. That is, as will be described later, when the data D communicated from the data exchanger 3 is communication data to the data terminal 1, the data is output to the data terminal 1 via the terminal interface 2a, and the data When the data D communicated from the exchange 3 is a tone signal indicating the exchange operation status, etc., the tone is outputted as an audible sound from the buffer amplifier 34 via the speaker 35.

The terminal connection device N2 configured as described above relays and controls data communication between the data exchanger 3 and the data terminal 1, and also controls the data exchange between the terminal connection device 2 and the data exchange I! 11, necessary data such as control data and various tone signals are transmitted and received.

On the other hand, the line circuit 4 of the data exchange 3 which transmits and receives data to and from the terminal connection device 2 having such a configuration is configured as shown in FIG. The reception gate circuit 41 receives the data frame transmitted from the terminal connection device 2 under the control of the synchronous reception clock circuit 42, and the reception frame data is stored in the reception frame register 43. It is now possible to do so. Further, the clock synchronization detection circuit 44 detects the synchronization timing from the synchronization signal F of the received frame, and the synchronous reception clock circuit 32 reproduces the reception clock according to this detected synchronization timing. The communication data D stored in the reception frame register 43 is transferred to the data reception buffer 45, and the control signal C is transferred to the control signal buffer 4G so that the control signals are assembled.

Furthermore, the data to be transmitted to the navigation terminal connection device 2 is stored in the transmission frame register 49 from the data transmission buffer 47 and the control signal transmission buffer 48, and is assembled into the above-mentioned frame format. It is transmitted to the terminal connection device 2 via. The transmission clock circuit 51 provides a control clock for the transmission frame, and the gate control circuit 52 similarly to the gate control circuit 25 in the terminal connection device 2 described above.
This controls to prevent collision between the transmitted frame and the received frame.

The communication data stored in the data reception buffer 45 is then sent to the PCM highway of the time switch circuit 3 shown in FIG. Subject to control. The communication data exchanged and controlled with other line circuits 11 is
The data is input from the CM highway via the PCM receiving circuit 54, stored in the data transmission buffer 47, and transmitted to the terminal connection Qf12.

Note that the transmission and reception timing (time slot) of communication data to the PCM highway is based on the count value of a time slot counter 56 that counts an internal clock generated by a clock circuit 55 that controls the operation of the line circuit 4;
This is done by detecting the time slot 1- assigned to itself (the line circuit 4) by the comparator 70 which compares the unique address 57 assigned to itself.

Further, the control signal from the terminal connection device 2 stored in the control signal reception buffer 46 is taken in by the control I device 60 of the line circuit 4, and is given to the control section 9 of the exchange 3 via l1061. Further, the control signal to be transmitted from the exchange 3 side to the terminal connection device 2 side is transmitted to the control unit 9 of the exchange 3.
The control signal is given to the control device 60 via l1061, and transferred from the control device 60 to the control signal transmission buffer 48 and transmitted.

Thus, when the control device 60 receives a tone signal indicating an exchange operation state from the line circuit 4 or the tone circuit 6, the control device 60 controls the data transmission buffer 4 of this tone data.
9, and also controls storage in the data transmission buffer 4.
7 and transmitted to the terminal connection device 2 is not communication data to the data terminal 1, but tone data to the terminal connection device 2 to which the data terminal 1 is connected. signal transmission buffer 48
-I am doing it. With such a data set, tone data is transmitted to the terminal connection device 2 instead of the communication data D for the data terminal 1, and control information indicating that the data of the transmission frame is tone data.

Upon receiving such control information, the terminal connection device 2 described above determines whether the received data is communication data to the data terminal 1 or tone data, and the received data classification circuit 33 outputs the received data. Selection will be controlled.

Further, the time switch circuit 8 is constructed as shown in FIG. This time switch circuit 8 is connected to the P
Communication data inputted from the CM highway via the input selector 65 or tone data inputted from the tone circuit 6 via the selector 65 are selectively written into the buffer memories 68 and 69 via the decoder 61. The communication data or data 1 to 1 written in the Balanoa memory 68 and 69 are selectively read out under the control of the time slot control circuit 70, the time slots are replaced, and the data is sent via the output selector 71. It is sent to the PCM High 1 Quay. The time slot control circuit 70 performs switching control of the time slots 1 to 1 under the control of the control unit 9 of the AJA machine 3.

The two buffer memories 68 and 69 are used to read data from the other in a designated time slot while writing data in one corresponding to a predetermined time slot, and the writing and reading are performed alternately. is repeated.

Exchange control by exchanging time slots by writing and reading data into and from the buffer memories 68 and 69 is performed by decoders 72 and 73 operating under the control of the time slot control circuit 70.
．． This is done by controlling each of the 69 access addresses. still,
In the figure, 14 is a counter circuit that counts internal clocks and regulates the operation timing of each part, and this counter circuit 7
4, the timing control circuit 75 controls the buffer memories 68 and 69 and the selector 71.
etc. is controlled.

Further, under the control of the control section 9 of the exchange 3, the tone control circuit 77 stores addresses 1 to -- in the tone control memory corresponding to each time slot, as shown in FIG. Information specifying the transmission of tone data is written therein, and in accordance with this information, tone data from the tone circuit is controlled to be input into a predetermined time slot via the input selector 65. The tone control memory shown in FIG. 6 is connected to the line circuit 4 to which time slot (10) is allocated among the line circuits 4 to which time slots (1) to (n) are allocated, respectively. This shows a state in which a busy tone is output to the terminal connection device 2 (data terminal 1). This tone control circuit 7
7, tone data indicating various switching operation states etc. is inserted from the tone circuit 6 into a predetermined time slot instead of the communication data. This tone data is then input to the line circuit 4 described above, and is sent to the terminal connection device 2 in place of the communication data to the data terminal 1.

According to the exchange system configured in this way, the data exchange 3 sends the 1 to 1 data corresponding to the exchange operation state to the terminal connection device 2 by using, for example, free communication data, and the terminal connection device In step 2, it is determined from the control signal from the data exchanger 3 whether the received data is communication data to the data terminal 1 or tone data indicating the exchange operation status and its output is controlled.
It becomes possible to output various audible tones such as a dial tone without managing the switching operation status in the terminal connection device N2 and without providing a dedicated control channel for 1-1 data communication. .

Therefore, since it is only necessary to manage various tone data on the data exchange I3 side, it is easy to change the tone signals when adding or changing service functions, and each terminal connection device 2 can control various tone signals. Since there is no need to do so, the configuration does not become complicated. Furthermore, since the tone data is communicated by using the communication channel of the call data communicated between the data terminal 1 and the data exchanger 3 and by using the free communication data (communication channel), the system configuration is It is simple and does not interfere with data communication, so it has various great effects such as high communication efficiency.

Note that the present invention is not limited to the embodiments described above. Although the data communication between the terminal connection device 2 and the data exchanger 3 is carried out here by ping-pong transmission, it is of course possible to employ other transmission forms. Regarding predetermined tones, a tone signal memory is provided in the terminal connection device 2, and the selection control signal is transmitted from the exchange 3 side, and the tone signals other than the predetermined tone signals are The signal may be given to the terminal connection device 2 from the exchange J*lJ3 in the same manner as above. Furthermore, the audible sound output of the [-- tone signal may be performed using a telephone terminal set. In addition, the present invention can be implemented with various modifications without departing from the gist thereof. .

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of a data exchange system constructed by applying an embodiment of the present invention, FIG. 2 is a diagram showing a schematic configuration of a terminal connection device according to the embodiment, and FIGS. 11
The figures are diagrams for explaining the embodiments of the present invention in detail; FIG. 3 is a block diagram showing the configuration of the terminal connection device, FIG. 4 is a block diagram showing the configuration of the line circuit of the data exchanger, and FIG. 6 is a block diagram showing the configuration of the time switch circuit of the data exchanger, FIG. 6 is a schematic configuration diagram of the 1-in control memory, FIG. 7 is a diagram showing the frame format of data transmitted ping-pong, and FIG. Diagram showing the format of the control signal, No. 9
The figure shows a data communication format between a telephone terminal and an electronic exchange, Figure 10 shows an example of the configuration of a transmitting/receiving circuit for ping-pong transmission, and Figure 11 shows 'N RZ signal and diphase signal. FIG. 1...Data terminal, 2...Terminal connection device, 2a...
・Terminal interface, 2b...Line interface, 2C...Audio circuit, 2d...Selector, 2e
...Control unit, 3...Data exchanger, 4...Line circuit, 6...Tone circuit, 16...Peripheral control unit, 3
3... Received data classification circuit, 34... Codec.
Buffer amplifier, 35...Speaker, 65...Selector, 77...Tone control circuit.

Claims (3)

[Claims] (1) A plurality of data terminals are each connected to a data exchange via a terminal connection device, and communication data transmitted digitally between the data exchange and each data terminal via the terminal connection device is transferred to the data exchange. In the data exchange system, the data exchange includes means for transmitting a tone signal indicating the state of data exchange control in place of the communication data, and information indicating the type of the transmitted data as a digital transmission control signal. and means for determining whether the received transmission data is communication data or a tone signal according to the received digital transmission control signal; means for outputting the transmission data to the data terminal when the transmission data is data, and outputting the transmission data to a tone generation circuit provided in the terminal connection device when the transmission data is a tone signal. A data exchange system characterized by: (2) The data exchange system according to claim 1, wherein the tone generation circuit is comprised of a D/A converter that converts a digitally transmitted tone signal into an analog one. (3) The means for transmitting a tone signal indicating the status of data exchange control of the data exchanger in place of communication data is carried out by utilizing vacant communication data that is digitally transmitted between the data exchanger and the data terminal. A data exchange system according to claim 1, which is a data exchange system.