JPS621342A - Exchange system for selective connection with terminal equipment - Google Patents

Abstract

PURPOSE:To facilitate special communication such as multiple address by providing a demultiplexer selector distinguishly as a selector selecting a terminal corresponding to plural terminal equipments. CONSTITUTION:In applying individual communication from the own station to each terminal device, a signal is given selectively to a prescribed selection circuit 16 to select registers 14, 15 for the selection of the same terminal device and only the terminal corresponding to the circuit can make communication. Then in applying multiple address communication from the own station to all terminal equipments 31, 32-3n, since the communication is transmission only, a flag is set to registers 14 at the same time. Since all the selection circuits 16 are conductive, the data from the own station are sent to all the terminal equipment 31, 32...3n. A reception register 15 is not set in this case.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention mainly relates to a switching system that enables effective communication by additionally using a selector in an exchange that selects a plurality of terminals.

[Prior Art] An example of an l-to-n exchange that selectively connects to a plurality of terminals is shown in FIG. 2. In FIG. 2, 1 is the exchange, 2 is the own station or own terminal, 31.32--3n is n terminals, 11 is a demultiplexer, 12 is a multiplexer, and 13 is one register as a selector. is connected to. register 1
3 to demultiplexer 11.3. By applying the signal to the select terminal of the multiplexer 12, the local station 2 is connected to any one of the predetermined terminals 31, 32, . . . .

At this time, only one set of terminals is communicating at a time, and when communicating with another terminal, a selection signal for selecting another terminal is given from the register 13 after the communication of that terminal is completed.

[Problem to be solved by the invention] In FIG. 2, the 1:1 i! There is no problem with regular communication, but n
The disadvantage is that it takes an extremely long time to transmit the same information to all terminals at the same time.

SUMMARY OF THE INVENTION An object of the present invention is to provide a switching system for selectively connecting terminals that can simultaneously transmit the same information to a large number of terminals, in order to improve the above-mentioned drawbacks.

[Means for Solving the Problems] The means adopted by the present invention to achieve the above-mentioned object is a selection method in which a signal for selecting a predetermined terminal is applied to a demultiplexer/multiplexer having terminals corresponding to a plurality of terminals. In a switching system for selectively connecting terminals by an exchange equipped with a switch, the selector is divided into a demultiplexer selector and a multiplexer selector, and the demultiplexer selector simultaneously selects a plurality of terminals. It is possible to generate a signal.

[Operation] The demultiplexer selector sends a selection signal to a terminal to be selectively connected, and then transmits data to the terminal. If the demultiplexer selector applies a signal that selects all terminals, it is possible to transmit to all terminals at the same time.

[Example] FIG. 1 is a diagram showing the configuration of an embodiment of the present invention.

In Figure 1, °1 is intersecting 11! ! 2 is the own station or terminal, 31, 32...3n are n terminals, 11 is a demultiplexer, 12 is a multiplexer, 14 is a demultiplexer selector, e.g., a register, and 15 is a multiplexer selector, e.g., a register. , 16 indicates a selection circuit, for example, an AND circuit.

In the operation shown in FIG. 1, when individual communication is performed from the own station to each terminal, a signal is selectively given to a predetermined selection circuit 16 for selecting the same terminal from the registers 14 and 15. Only terminals compatible with the circuit can communicate.

Next, when performing simultaneous broadcast communication from the own station to all terminals, flags are set in the register 14 all at once since it is only a transmission. Therefore, all selection circuits 16 become conductive, and data from the local station is transmitted to all terminals. In this case, the receiving register 15 does not contain any cents, IJ? .

Another example of operation is when requesting response data for communication with a terminal that is located far away among a large number of terminals, and blank time may occur, during which time communication can be performed with other terminals. . Therefore, register 14 and register 15 are both set to select terminal 31 in order to communicate with terminal 31. When the response from the terminal 31 is slow, or when data to be sent to the terminal 32 suddenly occurs, the register 150 cents remains as is, and the register 14 is set to select the terminal 32 when the transmission to the terminal 31 is completed. Switch. The data is sent to the terminal 32, and when it is finished, the register 14 is returned to the terminal 31 and the data is sent to the terminal 31.
communication can be resumed.

The above explanation was based on a 1-to-n switch, but since these 1-to-n switches can be combined to form an n-to-n switch, the scope of use can be expanded when using that switch. be able to.

[Effects of the Invention] Thus, according to the present invention, special communications such as simultaneous broadcasting can be easily performed with an extremely simple configuration.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of an embodiment of the present invention, and FIG. 2 is a diagram showing an example of a conventional exchange. 1-...Exchange 2--Local station 31, 32--3 n.One terminal 11...Demultiplexer 12...Multiplexer 13...Register

Claims (1)

[Claims] A selector that applies a signal for selecting a predetermined terminal to a demultiplexer (11)/multiplexer (12) having terminals corresponding to a plurality of terminals (31), (32), . . . (3n). (13), in which the selector (13) is connected to a demultiplexer selector (14).
) and a multiplexer selector (15), and the demultiplexer selector (15) is capable of generating signals for selecting a plurality of terminals at the same time.