JPS62277896A - Input/output terminal equipment accommodation system to time division electronic exchange - Google Patents

Abstract

PURPOSE:To enable the extension of an input/output terminal equipment easily by applying the time division multiplex to the data transmitting and receiving between the respective input/output terminal equipments and input/output controllers with the aid of utilizing the vacant time slot of a PCM highway. CONSTITUTION:When a data transfer starting instruction is issued to an input/ output controller 1 from a control processing unit 8, the input/output controller 1 reads an output data from a memory device 9 and puts it on the time slot on the indicated PCM highway 2a after multiplexing. An input/output terminal interface device 4 receives the output data from the time slot of the designated PCM highway 2b and converts it to the signal for the corresponding input/output terminal equipment 6 so as to transmit it to the input/output terminal equipment 6. Thus the input/output controller is sufficient to be at least one unit, so the constitution of a central processing equipment part becomes simple and moreover the input/output terminal equipment can be extended easily.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a method for accommodating input/output terminal devices in a time-sharing electronic exchange, and particularly relates to a method for accommodating input/output terminal devices in a time-sharing electronic exchange. The present invention relates to a suitable input/output terminal device accommodation system.

[Conventional technology]

The central processing unit of an automatic electronic switching system includes an input/output terminal device that performs maintenance and operation management of the switching equipment, an input/output terminal device that exchanges information with a processor that performs ancillary services of the switching equipment, and service functions performed by the switching equipment itself. A large number of input/output terminal devices may be connected, such as input/output terminal devices for When connecting a large number of input/output terminal devices, a corresponding number of input/output control devices are required.

Typically, channel devices or I1
0 processors are used. For example, JP-A-60-917
No. 96 describes a conventional technique using an I10 processor.

[Problem that the invention seeks to solve]

In the above conventional technology, a corresponding input/output control device is provided in the central processing unit for each input/output terminal V2ffl. Due to electrical constraints or physical/implementation constraints,
The number of input/output control devices that can be provided is determined by the maximum capacity of the central processing unit. Therefore, in the above-mentioned conventional technology, the central processing unit of the automatic exchange, which has the possibility of connecting a large number of terminals, becomes large-scale even if it is not actually connected, and furthermore, the equipment must be expanded to add input/output terminals. There is also the problem that it is not easy to do so.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for accommodating input/output terminal devices in a time-sharing electronic exchange, which allows easy addition of input/output terminal devices without increasing the scale of the central processing unit of the automatic exchange.

[Means for solving problems]

The above purpose is to provide an input/output terminal interface device that corresponds to the input/output terminal device accommodated in the one-time division electronic exchange.
Connecting to an input/output control device using a PCM highway via a time division exchange switch, and transmitting and receiving data between each input/output terminal device and the input/output control device using empty time slots of the PCM highway. This is achieved by time division multiplexing.

[Effect]

Since input/output data to a large number of input/output terminal devices is time-division multiplexed and distributed to each input/output terminal device using a time-division exchange switch, at least one input/output control device is required. The number of input/output terminal devices that can be accommodated can be increased without being limited by the number of devices.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

1 is a block diagram of a time-sharing automatic switching system to which an embodiment of the present invention is applied. In FIG. 1, the central control system includes an input/output control device 1, a terminal interface control device 5, a control processing device 8, and a memory device 9 storing programs, data, etc. for the control processing device 8. Prepare,
These are mutually connected by a common bus 7. The common bus 7 is used during normal program execution. A time division exchange switch 3 is also connected to this common bus 7.

It is connected to the input/output control device 1 by a PCM highway 2a. The time division switching switch 3 is also connected to a number of various input/output terminal interface devices 4 (only one shown) by a PCM highway 2b. Each input/output terminal interface device 4 is connected to a terminal interface control device 5 of a central control system, and is also connected to a corresponding input/output terminal device 6 (only one is shown). In this exchange system, by executing the exchange program, appropriate control commands are sent to the terminal interface control device 5,
5 or 1 to each input/output terminal interface device 4
It is issued directly to the time division exchange switch 3, and exchange operation is performed.

When transmitting and receiving data between the input/output control device 1 and each input/output terminal device 6, the control processing device 8 writes the data to be output into the memory device [9 and transfers the data to the input/output terminal interface device to be used. 4 and the input/output control device 1 is sent to the time division exchange switch 3, and the preparation is completed.

Next, a data transfer start command is issued to the input/output control device 1 from the control processing device 8. The input/output control device 1 reads output data from the memory device 9 and outputs it to a designated PC.
It is multiplexed and placed in a time slot on M Highway 2a. The input/output terminal interface device 4
It receives and receives output data from a time slot on the CM highway 2b, converts it into a signal for the corresponding input/output terminal device 6, and sends it to the corresponding input/output terminal device 6.

Data input from the input/output terminal device 6 is first detected by the input/output terminal interface device 4 to which the input request corresponds. When the control processing device 8 detects this, it sends a command to connect the input/output terminal interface device 4 and the input/output control device 1 to the time division exchange switch 3.

When the connection of the time division exchange switch 3 and the specification of the PCM highway 2b and time slot to be used are completed, transmission permission is granted to the input/output terminal device 6.

Data entry begins. The input data from the input/output data@6 is transferred to the PCM highway 2b and time slot designated by the input/output terminal interface device 4, and is sent to the input/output control device 1 via the time division exchange switch 3 and the PCM highway 2a. reach. The input/output control device 1 sequentially writes the received data to a bath area in the memory device 9 that has been reserved in advance.The end of the series of data is determined by a predetermined specific character. When the output control device 1 receives the corresponding character, it issues an interrupt to the control processing device 8 to notify it of completion of reception of input data.

Next, details of data transmission and reception between the above-mentioned time division exchange switch 3 and input/output control device 1 will be explained with reference to FIG.

FIG. 2 is a detailed configuration diagram of the input/output control device 1. As shown in FIG. The input/output control device 1 is connected to a common bus 7 of the central control system.
PUII, buffer memory 12, time slot memory 10.43, receive buffer 14, and transmit buffer 1
5 and 5 It consists of a local memory 16, a local bus 17 that interconnects these, and a reception gate 18 and a transmission gate 19 connected to the PCM highway 2a.

After the control processing unit 8 designates the input/output control unit 1 and writes the time slot numbers to be used for transmission and reception into the buffer memo 1/2 via the common bus 7.

CPtJll, which interrupts C, PUll, reads the contents of the buffer memory 12 and stores it in a predetermined time slot memory 1.
Write to 0 and 13. Receiving gate 18. Transmission gate 19
is the time slot memory 10゜13 connected to each
At the time of time slot 1- shown in the contents of
Receive buffer 1 by taking data on highway 2a
4, or send the contents of the transmission buffer 15 to the PCM
Send it out onto Highway 2a. When the receive buffer 14 is filled with data for the time slot, the CPU II reads it and determines whether there is a terminating character. If it is not the terminal character, the predetermined memory device 9 (
The data of the time slot is written to the address shown in FIG. 1 using the direct memory access function of the common bus 7. The address is incremented by +1 each time. If the content of the receive buffer 14 is a terminal character, the CPU II interrupts the control processing unit 8 and informs it that reception has been completed and the number of characters received. The control processing device 8 receives and receives input data stored from a predetermined address in the memory device 9.
Next, specify another address.

On the other hand, when transmitting, the control processing device 8 writes and arranges the transmission data in order on the memory device 9, interrupts the CPU II, and outputs the number of words of the transfer data and the starting address where the data is stored to the buffer memory 12. tell. CPU1
1 each time data is output from the transmission buffer 15 to the PCM highway 2a.

The transmission data is read word by word from the memory device 9 by direct memory access, and then written into the transmission buffer 15 as data to be output to the PCM highway 28.

As described above, using the input/output control device 1 shown in this embodiment, the control processing device 8 inputs and outputs data to any time slot of the PCM highway 2a.

Next, details of data transmission and reception between the one-time division exchange switch 3 and the input/output terminal interface device 4 will be explained with reference to FIG. FIG. 3 is a detailed configuration diagram of the input/output terminal interface device 4. As shown in FIG. The input/output terminal interface device 4 is a C
PU 20 , local memory 23 , buffer memory 21 connected to terminal interface control device 5 , asynchronous terminal interface 22 connected to corresponding input/output terminal device 6 , time slot memory 24 , 25 , and reception buffer 26 and a transmission buffer 27, a local bus 28 that interconnects these, a reception gate 29 and a transmission gate 30 connected to the PCM highway 2b.

The split switching switch 3 can switch between any time slots on any highway.

The data is placed in any empty time slot of the PCM highway 2b that accommodates the input/output terminal interface device 4 to which the input/output terminal device 6 to which the data you want to input/output is connected.

The control processing device 8 sends control commands to the time division exchange switch 3 via the common bus 7. Furthermore, a control processing device 8
to the input/output terminal interface device 4 via the terminal interface control device 5.

Tell the time slot number in which the data was loaded. 1゜The time slot number is written to the buffer memory 21,
It is read by the CPU 20 and further stored in the time slot memory 24.
．． 25. The reception gate 29 takes in data carried on the PCM highway 2b into the reception buffer 26 at each time of the corresponding time slot specified in the time slot memory 24. When the receive buffer 2G is full of data, the CPU 20 reads it and sends it to the input/output terminal device 6 through the asynchronous terminal interface 22.

Input data from the input/output terminal device 6 is written to a buffer (not shown) in the asynchronous terminal interface 22, read by the CPU 20, and written to the transmission buffer 27. The transmission gate 30 has a time slot memory 25
At the time of the time slot specified by
Load the contents of 7 onto PCM Highway 2b.

In this way, the input data is transferred to the PCM highway 2b, transmitted to the input/output control device 1 via the time division exchange switch 3, and used by the control processing device 8, as described above. Since the time division exchange switch 3 can arbitrarily select the input/output terminal interface device 4, it is easy to change the input/output terminal device.

〔Effect of the invention〕

According to the present invention, since at least one input/output control device is required, the configuration of the central processing unit is simplified, and additional input/output control devices are not required when adding input/output terminal devices to be connected. For some reason.

It has the effect of making it easier to add input/output terminal devices, achieving standardization and economy6.

[Brief explanation of drawings]

Fig. 1 is a block diagram of a time division switching system to which an embodiment of the present invention is applied, Fig. 2 is a detailed block diagram of the input/output control device shown in Fig. 1, and Fig. 3 is a block diagram of the input/output control device shown in Fig. 1. FIG. 2 is a detailed configuration diagram of a terminal interface device. 1... Input/output control device, 2a, 2b... PGM
Highway, 3... Time division exchange switch, 4... Input/output terminal interface device, 6... Input/output terminal device, 8... Control processing device.

Claims (1)

[Claims] 1. An input/output terminal interface device provided corresponding to the input/output terminal device accommodated in the time-sharing electronic exchange is connected to the input/output control device using the PCM highway via the time-sharing exchange switch, and each of the input/output terminal devices A system for accommodating an input/output terminal device in a time-division electronic exchange, characterized in that data transmitted and received between the input/output control device and the input/output control device is time-division multiplexed using empty time slots of the PCM highway.