JPS6322678B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a data transfer method for economical data transfer at high speed by a signal distribution device for controlling relays used in communication line equipment in an electronic exchange.

When a new telephone service is provided in an electronic exchange, special equipment necessary for the service, such as a voice response device, is installed in a trunk of a telephone line or the like. In addition, if the voice response device used exclusively for the new service has multiple functions such as an editing function in addition to the function of outputting a fixed voice message when activated, such as an announcement machine, the central processing system to the voice response device,
Data necessary for various types of editing is transferred.

Figure 1 shows the conventional interface of signal distribution equipment, in which one side of the relay with a wire-wound resistance of approximately 300Ω is connected to the +24V power supply, and the other is connected to the cable. It is connected via the collector of the transistor Q, which is the output of the signal distribution device SD. Transistor Q is determined from 16-bit pattern information for signal distribution device SD, row designation, and timing circuit.
Turns ON or OFF depending on the state of FF.

The fastest operation cycle of relay R is dial pulse transmission, but the cycle time is more than 10 ms, which is an incomparably slow cycle from the perspective of the central processing system.

This is natural since the communication line system only performs relay-based control. In this way, it is a device that has a line interface similar to a trunk, etc., and that belongs to the communication system as a function, and that receives various information from the central processing system and performs control.Data transfer from the central processing system. is performed using conventional technology: (1) interface to the bus of the central processing unit; and (2) interface from the central processing unit to the data channel.
IOC interface (3) Modem interface from the central processing unit via the data channel Data transfer is performed using the interfaces (1) to (3) above, but the amount of hardware in the interface section is relatively large and new There is a drawback that the ratio of the amount of hardware in the interface section to the amount of hardware such as a service-dedicated device is large.

The object of the present invention is to use an SD interface as a data transfer interface from a central processing system,
The purpose of the present invention is to provide a new data transfer method that requires less hardware in an interface part and ensures a high data transfer speed.

According to the present invention, the above object is to divide a plurality of current holding type elements of a communication path system device of an electronic exchange into N groups, and to control each current holding type element belonging to a group specified by designation information of each group. In a signal distribution device that controls the operation, holding, and recovery of current holding type elements for each group at once by sending information to a communication path system device, the control information is sent to the communication path system device. The signal distribution device is provided with means for transmitting a synchronization signal indicating timing together with the control information, and the channel device includes a reception means for receiving each of the control information, and a reception means for receiving each of the control information and receiving the synchronization signal. This is achieved by providing the means with a timing signal generating section that outputs a timing signal that controls the output timing of the control information.

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 2 is an explanatory diagram of an embodiment of the data transfer method according to the present invention.

A cable receiver REC consisting of a resistor, capacitor, and comparator is connected to the output of the signal distribution device SD via an interframe cable.

REC uses a filter formed by a resistor and a capacitor to prevent transient noise when the SD output changes and the effects of induced noise from overhead cables from being directly input to the comparator, and to stabilize the operation, the reference voltage is Set and use as the other input of the comparator. Furthermore, it is also effective to use a hysteresis type comparator or the like to make it more resistant to noise malfunctions. In this way, with a small amount of hardware, it is possible to construct an interface that is relatively strong against interframe cable noise.

When reading the output data of the SD using communication path equipment, a synchronization signal for reading is required. That is, information that new data has been set in the FF of the SD is obtained, and the communication path device reads the transfer data. In FIG. 2, bits 0 to 14 are allocated to transfer data, and the 15th bit is allocated to a synchronization signal.

The 15th bit synchronization signal is input to the SYG synchronization signal generator via the REC signal receiver, and a read control signal is generated.

FIG. 3 shows the time relationship between transfer data and synchronization signals. The synchronization signal is sent every time data is transferred from the SD.
It is set to change from ON to OFF or from OFF to ON.

When the waveform of the synchronization signal line (REC output) in Figure 3 is applied to the synchronization signal generator in Figure 2, the DET level detector detects whether the synchronization signal changes from ON to OFF.
For example, the intermediate level of the falling or rising edge that changes from OFF to ON is detected, the next T _IM timing circuit counts _TO time from the start of the signal, and after the _TO time, the PG pulse generator generates a synchronizing signal. (time width of T ₁ ), give a synchronous timing signal to the REG register, and extract the transfer data.

Here, T _O is the guard time determined by guaranteeing variations in the REC resistance and capacitor, as well as the attenuation time of noise generated in the overhead cable, and T1 is the guard time required for reading the transferred data by the communication line equipment. The time is set by the synchronization signal generator.
The transfer speed is determined by T _p and T ₁ , but SD
Depending on the conditions such as the cable length between the central processing system and the SD card, if the cable length is short,
Transfer is possible with a cycle time of 5.4 μs, resulting in a transfer of 370 Kbytes/Sec. Even if the span cable length is long (80 m), the required cycle time (taking into account T _p and T ₁ ) is approximately 10 μs, which is 200 K
The transfer speed is in bytes/Sec.

As explained above, a high-speed data transfer system can be realized by connecting the SD, which has hitherto driven and controlled the current-holding type relays of communication line equipment, to a device having an interface section using the data transfer method of the present invention. It becomes possible to use it as

Electronic exchanges have the advantage of being able to connect IO devices for new services relatively easily without changing the configuration of the electronic exchange, allowing data transfer from the central processing system to various new devices. This can be done easily and economically.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of conventional use of a signal distribution device, FIG. 2 is a block diagram of an embodiment of a data transfer system according to the present invention, and FIG. 3 is a block diagram showing an embodiment of a data transfer system according to the present invention. A certain time chart diagram of FIG. 2 is shown. 1 is a timing circuit, 2 and 3 are flip-flops, 4 is a relay, SD is a signal distribution device, SPS is a communication path device, REC is a signal receiver, SYG is a synchronization signal generator, DET is a level detector, and TIM is a timing circuit, PG is a pulse generator.

Claims (1)

[Scope of Claims] 1. A plurality of current holding type elements of a communication line system device of an electronic exchange are divided into N groups, and control information of each current holding type element belonging to the group specified by the specified information of each group is communicated. In a signal distribution device that controls the operation, holding, and restoration of current holding type elements for each group at once by sending it to a communication path device, the signal distribution device indicates the control information sending timing to the communication path device. Means for transmitting a synchronization signal together with the control information is provided in the signal distribution device, and the communication path device includes a receiving device that receives each of the control information, and a device that receives the synchronization signal and sends it to each receiving device. 1. A data transfer method, comprising: a timing signal generating section that outputs a timing signal for controlling output timing of control information.