JPH0738662B2 - Data transfer method - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data transfer method, and more particularly to a data transfer method for transferring the same data recorded in a specific magnetic tape device in an exchange to an information collecting station.

(Prior Art) Conventionally, a magnetic tape device is used for recording billing data, traffic data, etc. in an exchange station, and a tape on which necessary data is recorded is transported to an information collecting station which performs each process. However, recently, in order to save labor in these operations, a method of transmitting these data online to the information collection station has been adopted, but in order to prevent data loss due to a failure of the transmission system, etc. Often also perform magnetic tape recording in the exchange. Therefore, in addition to the magnetic tape device, the exchange is provided with a data transmission device in the central processing unit of the exchange to transmit necessary data to the information collecting station.

(Problems to be Solved by the Invention) However, as described above, providing the central processing unit with the data transmission device in addition to the magnetic tape unit means that the central processing unit and the channel device provided for connecting these devices are provided. If the magnetic tape device and the data transmission device are separately controlled, the control becomes complicated and the processing of the central processing unit is increased accordingly, and the exchange processing capacity is lowered. It has a drawback.

The object of the present invention is to eliminate the above-mentioned drawbacks, to receive in parallel signals on a common bus connecting a magnetic tape control device and a plurality of magnetic tape devices, and to extract necessary data from the read contents to thereby obtain data. It is to provide a data transfer method for transferring.

(Means for Solving Problems) The present invention relates to an electronic exchange in which a plurality of magnetic tapes are connected via a common bus to a magnetic tape controller connected to a central processing unit of the electronic exchange. A data transmission control device is connected, and this data transmission control device is a number reading circuit for reading the magnetic tape device number sent from the common bus to the magnetic tape device, and is also sent from the common bus to the magnetic tape device and recorded at the beginning of the magnetic tape. A heading reading circuit for reading the heading data, and a comparison circuit for comparing the heading data read from the heading reading circuit with preset heading data,
A number storage circuit for storing the magnetic tape device number read from the number reading circuit when a coincidence output is obtained from this comparison circuit, and data sent by designating the magnetic tape number stored in this number storage circuit. And a data storage circuit that reads and stores the data from the common bus and a transmission circuit that reads the data reception confirmation signal sent from the magnetic tape device to the common bus and transmits the data stored in the data storage circuit to the information collection station. Is configured.

With the above configuration, in the data transfer control device, the central processing unit first designates the magnetic tape device with a specific number as a record in the exchange to transfer the specific data to the information collecting station, and then the tape is first recorded. If a heading data of a fixed format including the recording type is written at the beginning, the data sent from this heading data to the magnetic tape device of this number is judged as the specific data to be transferred to the information collection station, and thereafter this magnetic data is recorded. When the magnetic tape device sends a data reception confirmation signal by extracting the data sent to the common bus by designating the tape number, this data is transferred to the information collection station. Therefore, the magnetic tape device does not detect the parity error or the like, and the same data is sent again from the central processing unit to the magnetic tape device, and the data is not duplicately transferred to the information collecting station. By the above operation, the central processing unit only records the data to be transmitted to the information collecting station on the specific magnetic tape, and the necessary data is transmitted without being aware of the information transmitting device.

(Example) Hereinafter, the Example of this invention is described in detail with reference to drawings.

The figure is a block diagram of an embodiment of the present invention, in which a data transmission control device (hereinafter DTCE) 1 of the present invention is an electronic exchange (hereinafter EX).
2 shows a case where one magnetic tape controller (hereinafter, MTC) 3 connected to a central processing unit (hereinafter, CPU) 21 and a plurality of magnetic tape devices (hereinafter, MT) 4 are connected to a common bus. ing.

DTCE1 is a number reading circuit (RMTN) 11 that reads the magnetic tape device number connected to the required line of the common bus, respectively,
Heading reading circuit (hereinafter RH
D) 12, a data storage circuit (hereinafter, RDAT) 13 for reading and storing data to be transmitted, and a confirmation signal reading circuit (hereinafter, RCE) 14 for reading a data reception confirmation signal sent from MT4.
Also, a heading data storage circuit (hereinafter referred to as SHD) 15 in which heading data of MT4 for recording data to be transmitted is stored in advance, heading data read by RHD12 and heading data stored in SHD15. The first comparison circuit (hereinafter COMPA) 16 for comparison, the number storage circuit (hereinafter MMTN) 17 that stores the magnetic tape device number read by the RMTN 11 in response to the coincidence output of COMPA 16, and the RMTN 11 after the coincidence output from COMPA 16 Read magnetic tape number and MN
The second comparison circuit (hereinafter COMPB) 18 that compares the magnetic tape number stored in TN17 and sends a storage instruction to RDAT13 when a match is found, and RDAT13 when the RCF14 reads the data reception confirmation signal. A transmission circuit (hereinafter, DTE) 19 that transmits the accumulated data to the information collection station is configured.

Next, the operation will be explained. First, the CPU 21 determines the MT4 for temporarily storing the data to be transmitted to the information collecting station, and the magnetic tape number and the heading data are stored in the MTC3.
RHD12 reads the header and sends it to COMPA16. COMPA16 is SHD15
When it is compared with the heading data stored in advance, the storage instruction is sent to the MMTN 17. Meanwhile RMTN11
Is reading the magnetic tape number, and MMTN17 stores this magnetic tape number. Next, the CPU 21 sends the data to be sent to the information collecting station to the common bus via the MTC3 by designating the above magnetic tape number, and the RMTN11 reads the magnetic tape number read at this time and the magnetic tape stored in the MMTN17. The number is compared via COMPB18, and if they match, a storage instruction is sent to RDAT13. On the other hand, the RDAT 13 stores the data read by this storage instruction. Then specified
When the above data is normally written in MT4, RCF14 reads the data reception confirmation signal sent to MTC3 via the common bus, and causes DTE19 to transmit the data stored in RDAT13 to the information collection station.

In the above operation, the MT4 relating to the data to be transmitted from the CPU 21 to the information collecting station has been described, but regarding the data to be transmitted using another data transmission line, or the data which may be simply recorded in another MT4. , CPU21 has a different magnetic tape number and heading data from the above MTC3.
Sent to the common bus from DTCE1, the above DTCE1 will not accept these data.

In the above embodiment, the MT that temporarily stores the data to be sent to the information collection station on the common bus from one MTC3.
It is assumed that only one unit is designated as 4, but when multiple MT4s are prepared in advance as standby standby, etc., multiple magnetic tape device numbers are stored in MMTN17, and COMPB corresponds to which magnetic tape device number. However, by giving the accumulation instruction to the RDAT 13, the same processing as in the case of one unit is performed.

Furthermore, when MT4s for transmitting data using the same line are connected to a plurality of MTC3s, the DTCE1 of the present invention is connected to the common bus of each MTC3, and the output side of the DTE19 is connected to the RCF14.
It can also be used by switching according to the output of.

(Effects of the Invention) As described in detail above, the present invention enables recording for temporary storage in a magnetic tape device without changing the program conventionally used for recording in a magnetic tape device in an exchange. At the same time, the data can be transmitted to the information collection station.

[Brief description of drawings]

The figure is a block diagram of one embodiment of the present invention. 1 ... Data transmission control device (DTCE), 2 ... Electronic exchange (EX), 3 ... Magnetic tape control device (MTC), 4 ... Magnetic tape device (MT), 11 ... Number reading circuit (RMTN) , 12
...... Heading reading circuit (RHD), 13 …… Data storage circuit (RDAT), 14 …… Confirmation signal reading circuit (RCF), 15 ……
Heading data memory circuit (SHD), 16,18 …… Comparison circuit (COMPA, COMPB), 17 …… Number memory circuit (MMTN), 19…
… Transmission circuit (DTE), 21… Central processing unit (CPU).

Claims (1)

[Claims] 1. An electronic exchange in which a plurality of magnetic tape devices are connected to a magnetic tape controller connected to a central processing unit of the electronic exchange via a common bus, and the magnetic tape is sent from the common bus to the magnetic tape device. A number reading circuit for reading a magnetic tape device number, a heading reading circuit for reading heading data sent to the magnetic tape device from the common bus, and a comparison circuit for comparing heading data read by the heading reading circuit with preset heading data. And a number storage circuit for storing the magnetic tape device number read from the number reading circuit when the comparison circuit obtains a match, and data sent by designating the magnetic tape number stored in the number storage circuit. The data storage circuit that reads from the common bus and stores it, and the data sent from the magnetic tape device to the common bus. Data transfer method characterized by having a transmission circuit for transmitting reads the acknowledgment signal stored in the data storage circuit data on an information collection station.