JPH01311659A - Duplex adapter for automatic exchange - Google Patents

Abstract

PURPOSE:To construct the duplex system of an automatic exchange designed for a simplex system by connecting two exchanges, and switching the exchange of an operating system to the one of a spare system when a fault is generated in the former. CONSTITUTION:When the fault is generated in a first automatic exchange and a fault signal is outputted in case of connecting the first communication line 50 of the first automatic exchange to a line 60, a fault signal reception means 20 receives the fault signal, and outputs fault detection information to a system switching control means 22. The system switching control means 22, at the time of receiving the fault detection information showing the fact that the fault is generated in the first automatic exchange, controls a system switching means 24 bases on the fault detection information, and connects a second communication line 52 to the line. In such a way, it is possible to make the improvement of the hardware of the exchange, and the addition and change of software unnecessary, and to construct the duplex system with high reliability as making the best use of existing facilities.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a duplex adapter for an automatic exchange, and particularly to a duplex adapter for an automatic exchange that is advantageously applied to an automatic private branch exchange.

(Prior art) - Generally, electronic automatic private branch exchanges with a redundant configuration have two control system devices that will make the entire system inoperable if a failure occurs.
It has a layered configuration. A duplex switch is equipped with a monitoring device that monitors operating control system devices at regular intervals. When the monitoring device detects a failure in the control system device of the active system, the exchange continues service by switching the system to the standby system and notifying the terminal drive system circuit of the system switch. Also, aren't the control system devices configured in duplicate? In the case of an ``electronic automatic private branch exchange'' with an LI configuration, there is no monitoring device for monitoring the installation of the control system, unlike in a duplex configuration. For this reason, when a control system device suffers a serious failure, an alarm is output to notify, for example, a maintenance person of the failure, but service cannot be continued and the system goes down.

(Problem to be Solved by the Invention) As mentioned above, between an automatic exchange with a two-way configuration and a single-operation exchange with a single configuration, the control program and system configuration of the exchange are important, so it is usually difficult to In addition, for the purpose of versatility, both the two-ton configuration and the single configuration are the same; if the stem can be selected, the redundant part will be removed in the funeral configuration. Therefore, in a system where a single configuration can be mainly selected, unnecessary components will be included because of the duplex configuration that is rarely requested by users.

SUMMARY OF THE INVENTION An object of the present invention is to provide a duplex adapter for an automatic exchange machine that can overcome the drawbacks of the prior art and convert an automatic exchange machine designed with a funeral configuration into a two-jaw system.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a duplex adapter for an automatic switching system that constructs a duplex switching system by combining two single-configuration automatic switching machines. 1 automatic switchboard 1st
and a second signal line of the second automatic exchange to a line including an extension line and a central office line; A receiving means for receiving a failure detection signal; and a system switching control means for inputting failure information of the first automatic exchange and the second automatic exchange from the receiving means and instructing the system switching means to perform switching control according to the failure information. and when the system switching control means receives failure information indicating that the first automatic exchange is in trouble from the receiving means while the first signal line is connected to the line, the system switching control means: The system switching means is instructed to connect the line to the second signal line, and in accordance with the instruction, the thread switching stage f connects the second signal line to the line.

(Function)) F. According to the invention, when the first communication line of the first automatic exchange is connected to the line, the first automatic exchange J! ll
When one aircraft becomes faulty and outputs a fault signal, the fault A and 1 receiver f receive this fault signal and send out fault detection information.
Output to the A change control means. When the system switching control means receives failure detection information indicating that the first automatic exchange is in failure,
Based on this failure detection information, the system 93 switching means is controlled to connect the second communication line to the line.

(Example) Next, an example of a duplex adapter for an automatic switching system according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 shows an example of a system configuration in which an embodiment of the 2'gX adapter for an automatic exchange according to the present invention is applied, and the exchange system is made into a duplex configuration. Exchanges 12 and 1
Reference numeral 4 denotes an electronic automatic private branch exchange, for example, in which the control system is not in a duplex configuration, and has a failure output function to notify of a serious failure that would cause a system failure. In the tree embodiment, the exchange 12 normally operates as the O system (main system), and the exchange 14 operates as the I system (standby system) when the exchange 12 has a serious failure.

A line circuit and a trunk circuit (not shown) of the exchange 12 are connected to the exchange side of the simple duplex adapter 10 via a θ system communication line 50. Further, a fault output terminal (not shown) of the exchange 12 is connected to the exchange side of the adapter 10 via an O-system fault signal line 70. Similarly, the line and trunk circuits (not shown) of switch 14 are
It is connected to the exchange side of the Agebuta 10 via the 1-system call a52, and the fault output terminal (not shown) of the exchange fi14 is connected to the exchange side of the adapter IO via the O-system fault signal line 72. On the line side of the Agebuta 10, an extension line to which a subscriber terminal such as a telephone 80 accommodated in the line circuit of the exchange 12 or 14 is connected, and an exchange a, 12 or 1
A central office line and a private line accommodated in the trunk circuit No. 4 are connected as a line 60.

FIG. 1 shows a block diagram of a duplex adapter 1o according to this embodiment. The fault signal receiving circuit 20 is connected to the O system fault signal line 70 via the O system fault signal receiving terminal 30 and to the 1 system fault signal line 72 via the 1 system fault signal receiving terminal 32. The signal receiving circuit 20 is a circuit that receives fault signals of the exchange from these receiving terminals and notifies the system switching sequence circuit 22 of the fault signals. That is, receiving circuit 2
0 receives a fault signal from the exchange 12 via the O-system fault signal receiving terminal 30, outputs fault detection information 80 to the sequence circuit 22, and also receives a fault signal from the switch 14 via the 1-system fault signal receiving terminal 32. When received, the fault detection information 82 is output to the sequence circuit 22.

The sequence circuit 22 is a control circuit that controls switching between the exchanges 12 and 14. Sequence circuit 2
2 is constituted by a sequence circuit that manages which exchange is to be activated in accordance with fault detection information input from the signal receiving circuit 20. In other words, the sequence circuit 22 outputs a relay OFF signal 84 with the exchange 12 as the operating system when all exchanges are in a normal state.
is output to the no-drive circuit 24, and the switch 12
If a failure occurs while the relay is in the operating system, a relay ON signal is output to the drive circuit 24 via the output 84.

The switching relay drive circuit 24 is a drive circuit that drives a plurality of switching relays 26 corresponding to the number of lines 60. When the drive circuit 24 receives the relay ON signal, it meters the switching relay 2G via the control output 90, and makes the exchange 14 an operating system. Note that the contacts of each switching relay 26 are shown as switching relay contacts 28. Each disconnection+relay contact 28 connects the line 60 to the O-system communication line 50 in the restored state, and connects the four-wire 60 to the 1-system communication line 52 in the operating state.

Next, the operation of this embodiment will be explained using FIGS. 1 and 2. When both exchanges 12 and 14 are in a normal state, sequence circuit 22 outputs a relay OFF signal to relay drive circuit 24. Therefore, the switching relay 26 is brought into a restored state, and the switching relay contact 28 is connected to the O-system communication line 50, so that the exchange 12 becomes the operating system.

If the switchboard 12 becomes seriously damaged, 1. The exchange 12 outputs a severe fault signal. This serious fault signal is transmitted to the 0 system fault signal line 70.
Fault signal receiving circuit 20 of simple duplex adapter IO via
is input. Upon receiving a fault notification of the exchange 12 from the O-system fault signal receiving terminal 30, the receiving circuit 20 outputs fault detection information 80 to the sequence circuit 22. When the sequence circuit 22 receives the detection information 80, it recognizes that the exchange 12 is at fault, and also confirms that the exchange 14 is not at fault.

After this confirmation, the sequence circuit 22 operates the relay drive circuit 24.
Outputs a relay ON signal to the When the drive circuit 24 receives this signal, it operates the switching relay 2B. As a result, the contact 28 of the switching relay 26 is made, and the line 6
0 is connected to the 1-system communication line 52. Note that in this embodiment, even if the exchange 12 becomes normal and the sequence circuit 22 detects this, the switching relay 26 is not activated unless the exchange 14 becomes a failure and the adapter 10 receives the failure output.
will not be restored.

In this way, in this embodiment, a duplex system can be constructed using any type of exchange as long as it is capable of outputting a serious failure signal. Furthermore, when constructing a duplex system, the switch connected to the duplex adapter 10 according to this embodiment does not require any special hardware changes, nor does it require any changes or additions to call processing programs.

Note that even if the exchanges 12 and 14 are of different types, they can be combined if they have the same number system, service system, etc. Furthermore, the embodiments described here are for explaining the present invention, and
The present invention is not necessarily limited to this; in other words, any duplex adapter that connects two exchanges and switches to a standby exchange when the active exchange fails is applicable to the present invention. Included in the range.

(Effects of the Invention) By applying the present invention in this way, a duplex configuration of a switching system can be constructed by combining two switching devices.

In this case, the exchange does not require modification of the hardware or addition/change of software, and different types of exchanges can be combined as long as they have the same number system and service system. Therefore, it is possible to construct a highly reliable redundant system while making use of existing equipment. Furthermore, if a single-configuration switch that can be changed to a duplex configuration is produced, there will be a lot of waste in hardware and software, resulting in a switch with low cost performance, but if the present invention is applied, such problems can be avoided. It will be resolved.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a duplex adapter for an automatic exchange according to the present invention, and FIG. 2 is a system showing an example of the configuration of a duplex switching system to which the duplex adapter of FIG. 1 is applied. FIG. -L + 7, 4 L τ Elo
, , , Simple duplex adapter +2.14 , , Exchange 20° 11. Fault signal receiving circuit 22, system cut sequence circuit 24, switching 1) Ray drive circuit 26, switching relay Patent applicant Oki Electric Industry Co., Ltd. Agent Number Number: Takao Kazan Oki Example of duplex adapter for switching equipment Figure 1 Example of configuration of a duplex exchange system to which this embodiment is applied Figure 2

Claims (1)

[Scope of Claims] A duplex adapter for an automatic exchange that constructs a duplex exchange system by combining two single-configuration automatic exchanges,
The adapter includes system switching means for connecting either the first signal line of the first automatic exchange or the second signal line of the second automatic exchange to a line including an extension line and a central office line; Receiving means for receiving failure detection signals output from the automatic exchange and the second automatic exchange, inputting failure information of the first automatic exchange and the second automatic exchange from the receiving means, and transmitting the system according to the failure information. and system switching control means for instructing the switching means to perform switching control, and when the first signal line is connected to the line, the receiving means indicates that the first automatic exchange is at fault. When the system switching control means receives the fault information, the system switching control means instructs the system switching means to connect the line to the second signal line.
A duplex adapter for an automatic switching system, characterized in that a signal line of the above is connected to the line.