JP2001007942A - Electronic line switching device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure the connection state of a line even in the case of a failure of a power source of an electronic line switching device itself capable of m:n switching. SOLUTION: Bypass routes S201 and S202 are provided which can hold the connection state of a line even if a voltage is not supplied to a logic part because of a failure of the power source of the device. At the beginning, a matrix switch part 201 is so set that a host A may be connected to a modem 1 and a host B may be connected to a modem 2, and relays 207 to 210 are connected to contact A sides. Relays 207 to 210 are non-latch type relays which are opened or closed in accordance with the presence or the absence of currents flowing their coils. When detecting that a voltage is not supplied, a relay control part 211 switches relays 207 to 210 to contact B sides, namely, bypass routes S201 and S202 connection of the line can be secured without voltage supply. Thus, connection of the host A to the modem 1 is secured through the relay 207, the bypass route S207, and the relay 209, and that of the host B to the modem 2 is secured through the relay 208, the bypass route S202, and the relay 210.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic line switching device for switching a line to which an information processing device is connected.
In particular, the present invention relates to an electronic line switching device that guarantees a line connection state even when a power supply fails.

[0002]

2. Description of the Related Art An example of this kind of prior art is disclosed in Japanese Unexamined Patent Publication No. Hei.
No. 128023. FIG. 11 is a block diagram showing the electronic line switching device. Referring to FIG. 11, the present electronic line switching apparatus includes a control unit 1, a relay unit 3, a switch control unit 4, a switch unit 5, a switch switching control unit 8, and a switch switching unit divided for each line block. 9, the operation display unit 2, the spare switch control unit 6 and the spare switch unit 7.

In the electronic circuit switching device thus constructed, the switch control section 4 and the switch section 5 are divided into circuit blocks, and an address is determined in advance for each circuit block. , Etc., can be controlled independently for each line block. Also,
The power is distributed to each switch block, each switch switching unit 9 and the control unit 1.

The control unit 1 controls transmission and reception of data to and from a higher-level device, controls the operation display unit 2, issues a switching instruction to each switch control unit 4, reads out the state of each switch unit 5, and performs a switch switching control unit. 8 is performed. The operation display unit 2 inputs a switching parameter, a switching instruction, and displays an operation state of the apparatus. The relay unit 3 includes a control signal from the control unit 1 and a switch control unit 4 or a switch switching control unit 8.
Relays the status signal. Switch control unit 4
Is composed of control logic, analyzes a switching control signal from the control unit 1, performs switching of the switch unit 5,
The connection state of the switch unit 5, the switching of the switch unit 5,
A notification such as a power supply abnormality is sent to the control unit 1.

The switch unit 5 is composed of various line drivers, receivers, and electronic analog switches, and switches lines. The spare switch control unit 6 is a spare for the switch control unit 4, and the spare switch unit 7 is a spare for the switch unit 5. Switch switching control unit 8
Is composed of control logic in the same manner as the switch control unit 4, switches the switch switching unit 9 in accordance with a switching instruction signal from the control unit 1, and notifies the control unit 1 of the connection state and abnormality of the switch switching unit 9. I do. The switch switching unit 9 is configured by a relay, and switches the switch unit 5 in an abnormal state to the spare switch unit 7 in accordance with an instruction from the switch switching control unit 8 when each switch unit 5 becomes abnormal.

[0006] In the electronic line switching apparatus thus configured, when an abnormality such as a power supply abnormality or switching abnormality of each switch section 5 occurs, the switch control section 4 sends the control section 1 to the control section 1.
The control unit 1 determines whether the failure of the switch unit 5 can be resolved. When it is determined that the failure cannot be resolved, the standby switch unit 7 is switched according to the connection status of the switch unit 5 in the abnormal state managed by the control unit 1 immediately. An instruction to switch the switch unit 5 to the spare switch unit 7 is issued. The switch switching control unit 8 issues an instruction to the switch switching unit 9 in accordance with the instruction from the control unit 1 and switches the switch unit 5 in an abnormal state.
Is switched to the spare switch unit 7. When switching is completed,
In response to the notification from the switch switching control unit 8, the control unit 1 replaces the address of the spare switch unit 7 with the address of the abnormal switch unit 5, and thereafter, until the maintenance staff replaces and repairs the abnormal switch unit 5 with the end. The spare switch unit 7 is used as the active switch unit, and the switch unit 5 in the abnormal state is used as the spare switch unit 7 to continue operation.

[0007]

However, in the above-described prior art, even if the power supply (DC) is separately supplied for each block of the line and the power supply (DC) is independently supplied, the DC is supplied for each block of the line. If the power supply (transformer of the power supply) fails, or if the power supplies of both the active switch unit and the standby switch unit fail, the line connection state cannot be guaranteed. The reason is that the switch unit and the spare switch unit of the electronic line switching device are constituted only by the logic that does not operate unless the power supply fails and the voltage is not supplied.

[0008] It is an object of the present invention to guarantee the connection state and operation state of a line even if a power supply which is a source of an electronic line switching device fails and a voltage is not supplied to a logic unit, thereby ensuring system reliability. An object of the present invention is to provide an electronic line switching device capable of further improving the performance.

[0009]

According to a first aspect of the present invention, there is provided an electronic line switching device for switching a line to which each information processing device of a multiplex online system is connected when an abnormality has occurred. Even if no voltage is supplied to the logic unit due to the occurrence, a bypass route that can maintain the connection state of the line is provided, and in the event of a power failure, the information processing device and the line are automatically connected so that the connection is performed by the bypass route. It is characterized by switching.

According to a second aspect of the present invention, there is provided an electronic line switching device for switching a line to which each information processing device of a multiplex online system is connected when an abnormality occurs, wherein at least one information line is provided for each line block. A matrix switch unit for switching and connecting the processing device to a plurality of lines, and connecting the information processing device to the matrix switch unit when power is supplied, and connecting the information processing device when power is not supplied. The first relay corresponding to the information processing device connected to the detour, the line is connected to the matrix switch unit when power is supplied, and the line is connected to the detour when power is not supplied. A second relay corresponding to the line to be connected;
And a relay control unit for switching between the first relay and the second relay, and a connection point in the matrix switch unit is set to a matrix intersection determined by the first relay and the second relay. .

More specifically, the present invention provides the matrix switch section with the connection point for connecting a substitute spare information processing apparatus to the line when one of the information processing apparatuses fails. A connection point can be connected to the second relay, and the first relay is also provided for the spare information processing device, and when the power is not supplied, the information processing device and the spare information Information for connecting the processing device to the line via the bypass is set in advance, and the first information is set based on the information.
And a composite relay unit for connecting the second relay and the second relay.

According to the present invention, when a line of an information processing device is switched in an electronic line switching device, the line is connected even if power is not supplied, separately from a route for connecting the line by electronic logic in a switch unit. Detour route (relay, wiring of package board, etc.)
It has. The electronic logic automatically switches between a route for connecting the line and a bypass route for connecting the line even when power is not supplied, by detecting whether power is supplied or not.

[0013]

Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram of an electronic circuit switching apparatus according to the present invention. The circuit 101 includes a control unit 101, a relay unit 102, a switch control unit 103 for each circuit block, and a switch unit 1.
04.

The control unit 101 controls transmission and reception of data with the host (switching the line from the host, etc.), controls the operation display unit 105, instructs switching to each switch control unit 103, and reads out the state of each switch control unit. The relay unit 102 is the control unit 1
01 and the status signal from the switch control unit 103 are relayed. The switch control unit 103 is configured by control logic, analyzes a switching signal from the control unit 101, switches the switch unit 104, and sends the connection state of the switch unit 104 to the control unit 101. The switch unit 104 connects the host and the modem according to preset point contact activation information, as described in detail below. The activation information is stored in the host or operation display unit 1.
05 to the control unit 101 and the switch unit 104
Is set to

The hosts connected to all the switch units 104 are the same (A, B, C as shown in FIG. 2), but the modems connected to each of the switch units 104 are different. .

As shown in detail in FIG. 2, the switch unit 104 includes a matrix switch unit 201, three host-side drivers / receivers 202 to 204, two modem-side drivers / receivers 205 and 206, and 4
It is composed of two relay units 207 to 210 and a relay control unit 211.

The matrix switch unit 201 is composed of an electronic analog switch, and in order to connect the three hosts A, B, and C to any one of the two lines, the switch control unit changes the connection of the 3: 2 line. This is performed in response to a switching instruction from 103. That is, the connection state of the line is determined depending on which of the contact points of the six connection points A1, A2, B1, B2, C1 and C2 is valid. It should be noted that which of the contacts at the six connection points is to be enabled is previously instructed to the control unit 101 from the host A, B, C, or the operation display unit 105 in FIG. 1 and is transmitted via the relay unit 102 and the switch control unit 103. Then, the route is set in the switch unit 104, but the route is omitted in FIG.

Five drivers / receivers 202-206
Is the signal level conversion for various lines (line level and TTL
Level). The relay control unit 211 has power supply.
The absence is detected, and the relays 207 to 210 are switched.
The relays 207 to 210 are non-latching relays that fall to the contact A side only while current is flowing through the coil inside the relay.

Next, as shown in FIG. 2, the operation of the present embodiment will be described in the case of 3: 2 line switching, that is, in the case of three hosts (active host 2 and spare host 1) and two lines. .

Normally, when the power of the electronic line switching device is turned on, the relays 207, 208, 209 are turned on.
And the relay 210 falls to the contact A side, that is, the matrix switch unit 201 side, and the connection point A1 and the connection point B2 of the matrix switch unit 201 become effective. As a result, host A is on modem 1 and therefore on line 1 and host B is on modem 2 and therefore on line 2
And become connected respectively. In such a line connection state, the operation of switching the line from the host A connected to the modem 1 to the host C will be described as an example. The operation when the host B is switched to the host C is also the same. is there.

First, a switching instruction for connecting the host C and the modem 1 is issued from the operation display unit 105 or the host C. Then, the control unit 101 receives the switching instruction data and sends the data to the switch control unit 103 through the relay unit 102. The switch control unit 103 analyzes the contents of the data, converts the data into contents that can be received by the matrix switch unit 201 of the switch unit 104, and switches the switch unit 104.
The matrix switch unit 201 includes the switch control unit 10
In order to connect the host C and the modem 1 in accordance with the instruction from 3, the connection point A1 is disconnected and the connection point C1 is made valid. Therefore, the line between the host C and the modem 1 becomes valid.

When a power supply failure occurs in this operation state and no voltage is supplied, the matrix switch unit 201
And the drivers / receivers 202 to 206 become inoperable, but the relay control unit 211 detects that power is no longer supplied and switches the relays 207 to 210 from the contact A side to the contact B side. Are connected from the matrix switch unit 201 to the detour S201 and the detour S202.
Connected to. Further, when the power failure is restored, the relay control unit 211 detects that the power is supplied and switches the relays 207 to 210 from the contact B to the contact A, so that the connection is returned to the original connection state.

Referring to FIG. 3, the relay control unit 21 at this time will be described.
0 and the operation of the relay 207 will be described. Note that the relays 208 to 210 have the same configuration as the relay 207 and operate in the same manner, and a description thereof will be omitted.

The relay 207 is a non-latch type relay that switches to a contact A when a current flows through the internal coil 303. When the power is supplied and the voltage reaches the level at which the device operates, the output of the power supply 305 goes high, and the inverter 3
04 goes low. Therefore, the inverter 30
A potential difference occurs between the 4 and 5V power supplies 306, and the coil 30
3, the relay 207 switches to the contact A side (matrix switch unit 201). When a power failure occurs, the voltage is not supplied, so the 5V power supply 3
06 becomes 0 V, the inverter 304 does not operate, and no current flows through the coil 303. Therefore, the relay 207 is switched to the contact B (the side of the bypass S201 and the bypass S202).

When the power supply is replaced and the power supply abnormality is resolved, a current flows through the coil 302 again, and the relay 207 switches to the contact A side. FIG. 4 shows the timing at which the above-described relay switches and the connection state of the relay.

Next, the following three patterns of line connection routes will be described with reference to FIG. The first pattern is
The setting is such that the host A and the modem 1 are connected to each other, and the host B and the modem 2 are set to be connected to each other, and the power supply of the device is turned on. The third pattern is a case where a power supply abnormality has occurred and the connection has been switched to the bypass S201. The third pattern is a case where a power supply abnormality has occurred and the connection has been switched to the bypass S202 after switching to the connection between the host B and the modem 2. .

First, when the power of the apparatus is turned on, the line of the host A does not operate unless the power is supplied through the relay 207, via the driver / receiver 202, the matrix switch unit 201 and the driver / receiver 205. Connected to modem 1. Further, the line of the host B is connected to the modem 2 via the driver 208, the driver / receiver 203, the matrix switch unit 201, and the driver / receiver 205 which do not operate unless power is supplied through the relay 208. Host C is not connected anywhere.

Next, after switching the host C to the connection to the modem 1 while the host B remains connected to the modem 2, the line of the host A is not connected anywhere. The line of the host B is the same as before switching. The line of the host C is connected to the modem 1 via the driver 204, the driver / receiver 204, the matrix switch unit 201, and the driver / receiver 205 which do not operate unless power is supplied through the relay 204.

Next, when the host A is connected to the modem 1 and the host B is connected to the modem 2, a power failure occurs.
When switching to the detour S201 and the detour S202, the line of the host A passes through the relay 207 and is connected to the modem 1 via the detour S201 and the relay 209 which are not affected by the power supply. The line of the host B passes through the relay 208 and is connected to the modem 2 via the bypass S302 and the relay 210 which are not affected by the power supply.

Next, an embodiment of the present invention will be described. In the above-described embodiment, the line connection state guaranteed when the power supply fails is only the pattern of the host A and the modem 1 and the pattern of the host B and the modem 2. However, as shown in FIG. With the addition, the connection between the other two patterns, that is, the connection between the host A and the modem 1, the connection between the host C and the modem 2, the connection between the host B and the modem 2, and the connection between the host C and the modem 1 can be guaranteed at the time of power failure. This guarantees the line connection at the time of power failure even when the host C is replaced by the host B or the host C is replaced by the host A in FIG. This embodiment will be described with reference to FIGS.

FIG. 6 shows a configuration in which a relay unit 601 and a relay 602 are added to the embodiment shown in FIG. The composite relay unit 601 is composed of a latch type relay, and the hosts A, B, and C when the power supply fails.
And the connection information of the modems 1 and 2 are stored in advance. Like the relays 207 to 210, the relay 602 is a non-latch type relay that falls down to the contact A side (the matrix switch unit 201) only when power is supplied.

FIG. 7 shows the internal configuration of the composite relay unit 601 and the relationship between the host A and the modem 1 when power is not supplied.
This shows the connection state of relay 701, relay 702, relay 703, and relay 704 when the line between host B and modem 2 is connected.

FIG. 8 shows the internal configuration of the composite relay unit 601 and the host C-modem 1 when power is not supplied.
701, relay 702, relay 703, relay 70 when the line between host B and modem 2 is connected
4 shows a state of FIG.

FIG. 9 shows the internal configuration of the composite relay unit 601, the host A and the modem 1 when power is not supplied.
701, relay 702, relay 703, relay 70 when the line between host C and modem 2 is connected
4 shows the connection state.

FIG. 10 shows a relay 701 that guarantees the connection between the host A and the modem 1, the host B and the modem 2, the host C and the modem 1, the host B and the modem 2, the host A and the modem 1, and the connection between the host A and the modem C and the modem 2. , Relay 70
2, the connection states of the relays 703 and 704 are shown in a table.

First, the case where the line between the host A and the modem 1 and the line between the host B and the modem 2 are connected by a detour when the power supply fails will be described.

When the power of the apparatus is turned on, the relays 207, 208 and 602 fall to the contact A side, that is, the matrix switch section 201 side, and the line is switched via the matrix switch section 201, and the connection state is established. Is guaranteed. At this time, the host or the operation display unit 10
Instruct from 5 that the setting of the composite relay unit 601 is a connection between the host A and the modem 1 and between the host B and the modem 2. The connection instruction is received by the control unit 101 and passed to the switch control unit 103. The switch control unit 103 sets the relay 701 of the composite relay 601 to A based on the switching instruction.
Side, the relay 702 is connected to the A side, the relay 703 is connected to the A side, and the relay 704 is connected to the A side.
The relay of the composite relay unit 601 of No. 4 is switched. As a result, as shown in FIG.
01 is A side, relay 702 is A side, relay 703 is A
And the relay 704 is connected to the A side.

If the power supply fails, the relay 20
7, the relay 208, the relay 602, the relay 209, and the relay 210 fall to the contact B side, that is, the detour side. Then, the line of the host A passes through the relay 207, passes from the relay 701 of the combined relay unit 601 to the relay 209 via the detours S701 and S703, and a route to the modem 1 is secured. Further, the line of the host B passes through the relay 208 and passes from the relay 702 to S702 and S70.
4, a route to the modem 2 through the relay 207 is secured. Therefore, even if the power supply fails, the line between the host A and the modem 1 and the line between the host B and the modem 2 are guaranteed.

Next, a case where the lines between the host C and the modem 1 and the lines between the host B and the modem 2 are connected by a detour when the power supply fails will be described. Host or operation display unit 1
From 05, an instruction is given so that the setting of the composite relay unit 601 is a connection between the host C and the modem 1 and between the host B and the modem 2. Then, as shown in FIG. 8, the composite relay 601 is connected to the B side, the relay 702 is connected to the A side, the relay 703 is connected to the A side, and the relay 704 is connected to the B side.

Therefore, the line of the host C is connected to the relay 602
, A route from the relay D704 of the composite relay unit 601 to the modem 1 through the relay 209 via the bypass S703 is secured. Further, the line of the host B passes through the relay 208, passes from the relay 702 through the detours S702 and S704, passes through the relay 210, and passes through the modem 2
Route to is secured.

The same applies to the case where the initial connection is between the host C and the modem 1, the host B and the modem 2, and the case where the initial connection is between the host C and the modem 1 and the host A and the modem 2.
In the latter case, when the power supply fails, the connection between the host A and the modem 2 is disconnected.

Finally, the case where the line between the host A and the modem 1 and the line between the host C and the modem 2 are connected by a detour when the power supply fails will be described. Host or operation display unit 1
From 05, an instruction is given so that the setting of the composite relay unit 601 is a connection between the host A and the modem 1 and between the host C and the modem 2. Then, as shown in FIG. 9, the composite relay 601 is connected to the A side, the relay 702 is connected to the B side, the relay 703 is connected to the B side, and the relay 704 is connected to the A side. Therefore, the line of the host A passes through the relay 207, and passes from the relay 701 of the composite relay unit 601 to the detours S701 and S7.
A route to the modem 1 is secured through the relay 207 via the network 03. The line of the host C is connected to the relay 208
, A route from the relay 703 to the modem 2 via the relay 207 via the bypass S704 is secured.

The same applies to the case where the initial connection is between the host A and the modem 1, the host C and the modem 2, and the case where the initial connection is between the host B and the modem 1 and the host C and the modem 2.
In the latter case, when the power supply fails, the connection between the host B and the modem 1 is cut off.

[0045]

An advantage of the present invention is that the state of the line between the host and the modem can be guaranteed even if the original power supply of the electronic line switching device fails. The reason is that a detour route that operates even when power is not supplied to the device is provided, and when power is not supplied, the line is automatically switched to the detour route.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a detailed block diagram of a switch unit in the embodiment shown in FIG.

FIG. 3 is a circuit diagram showing a detailed example of a relay control unit in the switch unit shown in FIG. 2;

FIG. 4 is a timing chart of the switching operation of the relay in FIG. 3;

FIG. 5 is a conceptual diagram showing an example of a line connection state;

FIG. 6 is a detailed block diagram of a switch unit according to another embodiment of the present invention.

FIG. 7 is a diagram showing details of a composite relay unit shown in FIG. 6 and a first example of a relay connection state;

8 is a diagram showing details of a composite relay unit shown in FIG. 6 and a second example of a relay connection state;

FIG. 9 is a diagram showing details of a composite relay unit shown in FIG. 6 and a third example of a relay connection state;

FIG. 10 is a diagram showing an example of setting values of the complex relays shown in FIGS. 7 to 9 and connection states of lines;

FIG. 11 is a block diagram showing an example of a conventional electronic line switching device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1,101 Control part 2,105 Operation display part, 3,102 Relay part 4,103 Switch control part 5,104 Switch part 6 Reserve switch control part 7 Reserve switch part 8 Switch switching control part 9 Switch switching part 201 Matrix switch part 202-206 Driver / receiver 207-210 Relay 211 Relay control unit 303 Coil 304 Inverter 305 Electricity 601 Composite relay unit 602 Relay 701-704 Relay

Claims (7)

[Claims] 1. An electronic line switching device for switching a line to which each information processing device of a multiplex online system is connected when an abnormality occurs, even if a power failure occurs and a voltage is not supplied to a logic unit, a connection state of the line. An electronic line switching device, wherein a detour route capable of holding the information is provided, and when the power supply is abnormal, the connection between the information processing device and the line is automatically switched so that the connection is established by the detour route. 2. An electronic line switching device for switching a line to which each information processing device of a multiplex online system is connected when an abnormality occurs, at least one information processing device being switched to a plurality of lines for each line block. A matrix switch unit for connecting the information processing device to the matrix switch unit when power is supplied, and connecting the information processing device to the detour when power is not supplied. A first relay for connecting the line to the matrix switch unit when power is supplied, and a second relay corresponding to the line for connecting the line to the detour when power is not supplied. Detecting the presence or absence of power supply and detecting the first relay and the second relay;
And a relay control unit for switching between the relays, and a connection point in the matrix switch unit is connected to the first switch.
An electronic line switching device, wherein the matrix intersection is determined by the relay and the second relay. 3. The matrix switch unit is provided with the connection point for connecting a substitute spare information processing device to the line when one of the information processing devices fails, and 3. The electronic line switching device according to claim 2, wherein the electronic line switching device is connectable to two relays. 4. The first relay is also provided for the spare information processing device, and when the power is not supplied, the first information processing device and the spare information processing device are connected to each other via the bypass. 4. The electronic line according to claim 3, wherein information for connecting to the line is set in advance, and a composite relay unit for connecting the first relay and the second relay is provided based on the information. Switching device. 5. The electronic line switching device according to claim 4, wherein said composite relay is constituted by a latch type relay. 6. The non-latching type relay, wherein the first relay and the second relay are opened and closed depending on the presence or absence of a current flowing through a coil and connected to the matrix switch side or the bypass circuit side. Claim 2
6. The electronic line switching device according to any one of claims 1 to 5. 7. The electronic line switching device according to claim 2, wherein the setting in the matrix switch or the composite relay is performed by the information processing device or the operation unit.