JPH02105644A - Optical switch - Google Patents

Abstract

PURPOSE:To easily construct a system in the case of switching when a fault occurs or in the case of extending a cable by providing an automatic switching function for plural communication circuits of standard specification, and performing the same packaging. CONSTITUTION:When data transfer is performed between a host A system 1 and a terminal 12, the pull-in instruction signal of an optical switch X is sent from the host A system 1 to the optical switch X by a control data line 15. Thereby, an A system group RS232C driver/receiver circuit 3 is connected to an optical transmission circuit 7 and an optical reception circuit 8. Also, when the data transfer is performed between a host B system 2 and the terminal 12, the pull-in instruction signal of the optical switch is sent from the host B system 2 to the optical switch X by a control data line 16. Thereby, the switching control circuit 8 of the optical switch X detects the pull-in instruction signal from the host B system 2, and connects a B system group RS232C driver/ receiver circuit 4 to the optical transmission circuit 7 and the optical reception circuit 8 by a multiplex circuit 5.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an optical switch suitable for use in constructing a multiplexed online system, and in particular to automatic switching of multiple standard communication circuits. It is equipped with multiple functions and can be used as an optical switch in the same package.

[Prior Art] Generally, when constructing a communication system, an automatic communication path switching function and a standard communication circuit such as R5232C are essential.

However, in conventional optical communications, there was no optical switch equipped with such an automatic communication path switching function or a standard communication circuit such as R5232C.

[Problems to be solved] In the conventional optical communication mentioned above, automatic switching function and R3232
Since there were no optical switches equipped with standard communication circuits such as C, it was necessary to perform system switching in the event of a system failure in a multiplexed online system using optical communication, to prevent data errors due to electromagnetic induction noise, and to extend cables. When considering this, there was a problem that the system could not be easily constructed.

The present invention has been made in view of the above problems, and includes an automatic switching function of a plurality of standard communication circuits, and
The purpose is to provide optical switches in the same package.

[Means for Solving the Problems] In order to achieve the above object, an optical switch of the present invention includes an optical connector connected to an external optical fiber, an optical transmitting/receiving circuit connected to the optical connector for transmitting and receiving optical signals, and a plurality of a multiplex circuit that inputs and multiplexes communication signals and connects to the optical transmitter/receiver circuit; a plurality of standard communication circuits that connect the multiplex circuit and an external communication device according to standard communication procedures; The configuration includes a switching control circuit that controls connection switching with a standard communication circuit.

The above components are packaged in the same package.

[Example] Hereinafter, the present invention will be explained in detail based on the drawings.

FIG. 1 is a block diagram of an optical switch X according to an embodiment of the present invention.

In the figure, 1 is a host system, 2 is a host system, 3 is an A system R5232C driver/receiver circuit connected to host system 1, and 4 is a B system R3232C driver connected to host system 2. /receiver circuit, 5 is a multiplex circuit.

Further, 6 is a switching control circuit for switching between the A system system R5232C driver/receiver circuit 3 and the B system system R5232C driver/receiver circuit 4, 7 is an optical transmitting circuit, 8 is an optical receiving circuit, 9 is a transmitting side optical connector, 10 is a receiving side optical connector, 11 is a power supply circuit, and 12 is a terminal.

Here, host system 1 and A system R3232
What is the C driver/receiver circuit 3?The control data line 13
Connected to Hostro System 2 and B System R52
It is connected to the 32C driver/receiver circuit 4 via a control data line 14. Further, the host system 1 and the switching control circuit 6 are connected to each other by a control data line 15, and the host system 2 and the switching control circuit 6 are connected to each other by a control data line 16. Furthermore, A system R52
32C driver/receiver circuit 3 and B system system R52
The 32C driver/receiver circuit 4 and the switching control circuit 6 are
Control data lines 17 . to multiplex circuits 5 respectively.
Connected at 18.19. And the multiplex circuit 5 is
It is connected to the transmission side optical connector 9 via the control data line 20, the optical transmission circuit 7, and the control data line 22, and
It is connected to the receiving side optical connector 10 via the control data line 21, the optical receiving circuit 8, and the control data line 23.

Optical connectors 9, 10 are also connected to terminal 12 via optical fibers 24, 25.

On the other hand, the power supply circuit is connected to the host system 1 and the host system 2 via a DC power line 26.

In the above configuration, first, the DC+
When VO is supplied, the power supply circuit 11 outputs DC+V1. D.C.
+V2. It is converted to DC-V3 and supplied to each circuit in the optical switch X.

Next, when data is transferred between the host system 1 and the terminal 12, the host system 1 sends a pull-in instruction signal to the optical switch X via the control data line 15.

Then, the switching control circuit 6 of the optical switch
The A-system R5232C driver/receiver circuit 3, the optical transmitter circuit 7, and the optical receiver circuit 8 are connected by this.

Here, when the A-system RS232CF driver/receiver circuit 3, the optical transmitter circuit 7, and the optical receiver circuit 8 are connected, data transfer between the host A system l and the terminal 12 is as follows: host A system l←→control data Line l3←→A system system RS232C driver/receiver circuit 3←→Control data line l7←→Multiple circuit 5←→Control data line 20/21←→Optical transmitting circuit 7/Optical receiving circuit 8←→Control data line 22/ 23←→Sending side optical connector 9/Receiving side optical connector lO←→Optical fiber 24/25←→Terminal l
It is done as 2.

When data is transferred between the host B system 2 and the terminal 12, the host B system 2 sends an optical switch pull-in instruction signal to the optical switch X via the control data line 16.

Then, the switching control circuit 6 of the optical switch
The B system RS232C driver/receiver circuit 4, the optical transmitter circuit 7, and the optical receiver circuit 8 are connected by this.

Here, when the B system RS232C driver/receiver circuit 4, the optical transmitter circuit 7, and the optical receiver circuit 8 are connected, data transfer between the host B system 2 and the terminal 12 is as follows: host B system 2←→control data Line l4←→B system system RS232C driver/receiver circuit 4←→Control data line 18←→Multiple circuit 5←→Control data line 20/21←→Optical transmitting circuit 7/Optical receiving circuit 8←→Control data line 22/ 23←→Sending side optical connector 9/Receiving side optical connector lO←→Optical fiber 24/25←→Terminal l
It is done as 2.

It should be noted that the present invention is not limited to the above embodiments, but includes various modifications within the scope of the gist. For example, in the above embodiment, RS232C is used, but other standards may also be used.

[Effects of the Invention] As explained above, the present invention is useful for system switching in the event of a system failure, data error prevention against electromagnetic induction noise, and cable extension in a multiplex online system using optical communication. If you do
This has the effect of providing an optical switch that allows a system to be easily constructed.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an optical switch X according to an embodiment of the present invention. Driver/receiver circuit 42B system system RS232C Driver/receiver circuit 5: Multiplex circuit 6: Switching control circuit 7: Optical transmitting circuit 8: Optical receiving circuit 9: Transmitting side optical connector 1O: Receiving side optical connector 24, 25: Optical fiber

Claims (1)

[Claims] An optical connector connected to an external optical fiber, an optical transmitter/receiver circuit that connects to this optical connector to transmit and receive optical signals, and a multiplex circuit that inputs and multiplexes multiple communication signals and connects to the optical transmitter/receiver circuit. , comprising a plurality of standard communication circuits that connect the multiplex circuit and an external communication device according to a standard communication procedure, and a switching control circuit that controls connection switching between the multiplex circuit and the standard communication circuit. Features an optical switch.