JP2004023687A - Node apparatus and method for handling board thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a node apparatus whereby the maintenance procedure for a board can be simplified so as to enhance the convenience and prevent errors in maintenance. <P>SOLUTION: The board provided to a node #A to be inserted/withdrawn into/from the node is provided with an ejector 32 activated with the insertion / withdrawal of the board and a switch 33 interlocking with the ejector 32. When the ejector 32 is drawn to remove the board , the switch 33 is turned on to inform a main control section 7 of the node #A about a notice signal including a board ID accordingly. The main control section 7 uses a switching control signal generating section 7a to automatically generate a switching control signal b to direct traffic related to a 0 system board 20 to a 1 system board 21 by bypassing the 0 system board 20 before the 0 system board 20 is removed, which informs of the board ID, and gives the control signal to a high speed interface section, a multiplexer / demultiplexer section in the apparatus, and each of function blocks of a low speed interface section. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention includes a node device used in a digital signal transmission system conforming to a standard such as SDH (Synchronous Digital Hierarchy) / SONET (Synchronous Optical Network), which includes a board that can be inserted and removed, and a node device that is inserted and removed from the node device. The present invention relates to a method for handling a substrate that is provided.
[0002]
[Prior art]
As is well known, this type of node device is configured with a plurality of boards, and each board has a redundant configuration that is distinguished between a 0 system (active system) and a 1 system (standby system). The board is provided so as to be insertable into and removable from the node device main body, and is replaced when a failure occurs. For operation and maintenance, the board can be removed for maintenance work.
[0003]
At the time of substrate maintenance, in order to avoid disconnection of traffic, it is necessary to previously divert traffic flowing on the substrate to be removed to another substrate inside the apparatus. For example, when removing the 0-system high-speed (HS) interface board, it is necessary to take the procedure of removing the 0-system high-speed interface board after diverting the traffic accommodated in this board to the 1-system high-speed interface board. No. That is, during board maintenance, the traffic accommodated in the board is diverted, then the board is removed, a new board is inserted, and after confirming that the board operates normally, the work of returning the diverted traffic is returned. Is required.
[0004]
Conventionally, a work procedure at the time of board maintenance largely depends on an operator's manual operation using a maintenance terminal or the like connected to the node device. The operator performs the above procedure by designating identification (ID) information of a target board, a location of switching control in the device, and inputting a command from the maintenance terminal to the node device. The commands include a switching command for bypassing traffic from the maintenance target board and a switching prohibition command for preventing malfunction of the non-maintenance target board due to insertion and removal of the maintenance target board.
[0005]
By the way, the configuration of the node device in recent years is becoming more and more complicated along with an increase in the transmission capacity to be handled, and the number of substrates has been enormous accordingly. The operator performs the command input operation in accordance with a procedure manual or the like. However, due to an increase in the scale of the apparatus, the load at the time of the operation is large, and the risk of making a mistake is also increasing.
[0006]
When performing board maintenance, the network is often already in operation, and if an operation error occurs, such as entering a command to an erroneous target, the traffic during transmission may be seriously affected. is there. In addition, there is a risk that traffic may be seriously affected even if a board to be maintained is mistaken for another board and another board is accidentally removed, and some solution is desired.
[0007]
[Problems to be solved by the invention]
As described above, in the conventional board maintenance in the node device, a manual procedure is included, and since the operation itself is complicated, the possibility of an operator's operation error cannot be denied, and the traffic may be seriously affected. There is.
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a node device and a substrate handling method capable of simplifying a work procedure in board maintenance, thereby improving convenience and preventing a work error. is there.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is provided in an information transmission system including a transmission line, and in a node device that transmits traffic via the transmission line, is provided so as to be able to be inserted into and removed from the node device main body. A movable position fixing mechanism for attaching / detaching to / from the node device main body, and a switch which takes at least two states in conjunction with two states of a fixed state or a fixed release state taken by the position fixing mechanism, A plurality of boards that are made redundant by including an active system and a standby system that are associated with each other, and a switching unit that switches a route of the traffic flowing through the board to a corresponding system-side board according to a given control command; Switching control signal generation means. Then, the switching control signal generating means recognizes the state of the position fixing mechanism on each substrate from the state of the switch, and generates the control command when the position fixing mechanism is in the fixing release state. Is provided to the switching means, and the route of the traffic flowing through the board is switched to the corresponding board on the system side.
[0009]
With such a configuration, when a certain substrate is removed, for example, a position fixing mechanism such as an ejector is moved, and in response to this, the state of the switch is turned on, for example. Then, using this as a trigger, the switching control signal generating means recognizes the state of the board. That is, when the ejector is moved to the unlocked state to remove the substrate, the switching control signal generation means recognizes that the substrate is to be removed. In response to this, a control command for switching the route of the traffic flowing through the board to the board of the corresponding system is automatically generated by the switching control signal generating means, and this control command is given to the switching means. Thereby, for example, the route of the traffic flowing through the active board is switched to the standby board before the board is removed from the node device main body.
[0010]
That is, according to the present invention, when the switch of the board to be removed is turned on (or off) as a trigger, the control command conventionally given by the operator is automatically generated, and the This command is given before the substrate is removed. Accordingly, the operator does not need to perform an operation such as specifying a target substrate and inputting a command during the substrate maintenance operation, and the operation procedure is greatly simplified. Also, even if the wrong board is removed, the traffic flowing through this board is diverted to the standby system or the working system in advance. Therefore, it is possible to prevent a work error and eliminate the possibility of disconnecting traffic.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a diagram showing a configuration of a digital signal transmission system in which a node device according to the present invention is installed. In the present embodiment, a synchronous transmission system conforming to SDH is assumed.
[0012]
This system includes a plurality of node devices (Node: hereinafter, referred to as nodes) #A to #G, and a service line SL and a protection line PL connecting these nodes in a ring. The protection line PL is a standby system of the service line SL. Each of the nodes #A to #G is connected to a lower device 10 such as an exchange or a terminal device.
[0013]
The low-order group signals exchanged between the lower-level device 10 and each of the nodes #A to #G are, for example, at STM (Synchronous Transport Module) -1, STM-4, STM-16, or STM-64 level in SDH. is there. This low-order group signal is multiplexed in each of the nodes #A to #G and sent to the service line SL and the protection line PL as a high-order group signal such as STM-64. Note that there are two directions in which the high-order group signals are transmitted in each of the nodes #A to #G: a clockwise (Clockwise: CW) direction and a counterclockwise (Counter Clockwise: CCW) direction. Here, for convenience, the CW direction at node #A is referred to as the East side, and the CCW direction is referred to as the West side.
[0014]
The nodes #A to #G are connected to a monitoring control device 200 that performs monitoring processing and control processing of the entire network. Note that the number of monitoring control devices 200 is arbitrary according to the needs of the system design. For example, the entire system may be monitored and controlled by a single monitoring and control device 200. Each of the nodes #A to #G is connected to the lower-level device group 10 via the lower-order group line Z.
[0015]
FIG. 2 is a functional block diagram showing a main part configuration of node #A shown in FIG. The nodes #B to #G have the same configuration. The node #A includes functional blocks of a high-speed (HS) interface unit, a device multiplexing / demultiplexing (MUX / DMUX) unit, and a low-speed (LS: Low Speed) interface unit, each of which is mounted as a board.
[0016]
The HS interface unit includes a 0-system high-speed interface board 50 and a 1-system high-speed interface board 51, and is made redundant. The 0-system high-speed interface board 50 is connected to the service line SL, and the 1-system high-speed interface board 51 is connected to the protection line PL.
[0017]
The intra-apparatus multiplexing / demultiplexing section is provided with a 0-system multiplexing / demultiplexing board 40 and a 1-system multiplexing / demultiplexing board 41, and is made redundant. The LS interface unit includes a plurality of low-speed interface boards, and each of the interface boards is paired with a redundant system 0 low-speed interface board 20, a single system low-speed interface board 21, ..., a 0-system low-speed interface board 2n-1. , 1-system low-speed interface board 2n.
[0018]
The 0-system low-speed interface board 20, the 1-system low-speed interface board 21,..., The 0-system low-speed interface board 2n-1, and the 1-system low-speed interface board 2n are connected to the lower-level devices 11, 12,. 1n. The lower devices 11, 12,..., 1n are devices such as exchanges and terminal devices belonging to the lower device group 10.
[0019]
Inside the apparatus, the 0-system high-speed interface board 50 and the 1-system high-speed interface board 51, and the 0-system low-speed interface board 20, the 1-system low-speed interface board 21, ..., the 0-system low-speed interface board 2n-1, and the 1-system low-speed interface board The 2n, 0-system multiplexing / separating board 40 and the 1-system multiplexing / separating board 41 are all connected via a changeover switch (not shown). The changeover switch performs changeover control between system 0 and system 1 in response to a control command given from the outside.
[0020]
0-system high-speed interface board 50 and 1-system high-speed interface board 51, 0-system low-speed interface board 20, 1-system low-speed interface board 21, ..., 0-system low-speed interface board 2n-1, 1-system low-speed interface board 2n, and 0-system The multiplexing / demultiplexing board 40 and the 1-system multiplexing / demultiplexing board 41 are both connected to the main controller 7 via the control bus CB.
[0021]
In the present embodiment, the data bus for giving a message from the 0-system low-speed interface board 20, the 1-system low-speed interface board 21,... A DB is provided.
[0022]
Incidentally, the main control unit 7 includes a switching control signal generation unit 7a in addition to known control functions such as APS (Automatic Protection Switching) and path setting control. The switching control signal generation unit 7a generates a control command for controlling the changeover switch based on the information notified from each of the boards, and gives the control command to the changeover switch. Then, the path of the traffic flowing through the board to be removed is switched to the corresponding system-side board before the board is removed from node #A.
[0023]
The switching control signal generation unit 7a is a functional object realized by software processing of a CPU (Central Processing Unit) (not shown) provided in the main control unit 7.
[0024]
In the above configuration, in the initial state, the lower-level device 11 and the opposing node are connected to each other via a route that passes through the 0-system high-speed interface board 50, the 0-system multiplexing / demultiplexing board 40, and the 0-system low-speed interface board 20 inside the node #A. It is assumed that traffic is transmitted and received between and.
[0025]
FIG. 3 is a schematic block diagram of a configuration of a board provided in node #A shown in FIG. That is, the 0-system high-speed interface board 50, the 1-system high-speed interface board 51, the 0-system low-speed interface board 20, the 1-system low-speed interface board 21, ..., the 0-system low-speed interface board 2n-1, the 1-system low-speed interface board 2n, and the 0-system The multiplex / separation substrate 40 and the 1-system multiplex / separation substrate 41 each have the configuration shown in FIG. 3 in the present embodiment. FIG. 3 representatively shows a 0-system low-speed interface board 20 (hereinafter abbreviated as board 20).
[0026]
The board 20 is fitted and connected to the shelf or subrack of the node #A via the connector 31. Further, the substrate 20 includes a movable ejector 32. The ejector 32 is moved in the direction of the arrow in the figure by a manual operation of a maintenance operator.
[0027]
As shown by the dotted line, for example, when the ejector 32 is pushed in, a lock mechanism or the like operates to fix the position of the substrate 20 at the node A. Conversely, as shown by the solid line, the lock is released when the ejector 32 is pulled out. When the board 20 is pulled out from this state, the fitting in the connector 31 is released, and the board 20 can be removed from the node A.
[0028]
By the way, the board 20 includes a switch 33 that is linked to the movement of the ejector 32. The switch 33 is realized as a toggle switch or the like, and takes two states, OFF and ON, depending on whether the ejector 32 is pushed or pulled out.
[0029]
The state of the switch 33 is recognized by the control chip 34 via the internal bus 36. When the ejector 32 is pulled out and the switch 33 is turned on, the control chip 34 reads the board ID 35a stored in the memory 35, and sends a notification signal c including the board ID 35a to the main control unit 7 of the node #A. Notice. In response to this, the switching control signal generator 7a generates a switching control signal b for switching traffic flowing through the board 20 to the board 21, and supplies the switching control signal b to the switch via the control bus CB.
[0030]
FIG. 4 is a flowchart showing a processing procedure when inserting and removing the 0-system low-speed interface board 20 from the state shown in FIG. In FIG. 4, when removing the substrate 20 from the node #A, the ejector 32 is pulled out (step S41). Then, the switch 33 is turned on by ejecting the ejector 32. As a result, the switching control signal generation unit 7a is notified of the board ID of the board 20, and a switching command for switching traffic flowing through the board 20 to the board 21 side and an in-device multiplexing / demultiplexing unit (that is, the 0-system multiplexing / separating board 40). And the redundant switching in the 1-system multiplexing / demultiplexing board 41) is prohibited, thereby generating a fixed command for fixing the traffic route. These commands are respectively given to the changeover switches to be controlled. As a result, the traffic flowing through the 0-system low-speed interface board 20 is switched to the 1-system low-speed interface board 21, and the route of this traffic flowing through the 0-system multiplexing / demultiplexing board 40 is fixed to the 0-system multiplexing / separating board 40. (Step S42).
[0031]
The reason why switching in a functional block other than the functional block to which the board involved in traffic path switching belongs is prohibited in order to prevent unnecessary switching control from being performed due to the influence of noise or the like generated when inserting or removing the board. . Here, switching control in functional blocks other than the low-speed interface unit to which the board 20 belongs, that is, the high-speed interface unit and the in-device multiplexing / demultiplexing unit are prohibited.
[0032]
When another or maintained board 20 is inserted into the node #A from this state (step S43), the ejector 32 of the board is pushed into the fixed position. Then, the switch 33 is turned off by pushing the ejector 32. As a result, the switching control signal generation unit 7a outputs a switchback command for switching back the route of the detouring traffic to the board 20 and a command for releasing the prohibition of the switching control in the in-device multiplexing / demultiplexing unit. The command is generated and given to each switch to be controlled.
[0033]
Then, the prohibition of the switching control in the in-device multiplexing / demultiplexing unit is released, and the traffic flowing through the 1-system board 21 is switched back to the 0-system board 20 (step S44). Thus, the maintenance work of the 0-system substrate 20 is completed.
[0034]
FIG. 9 is a flowchart illustrating a processing procedure at the time of substrate maintenance in a conventional node device for comparison. In FIG. 9, the operator switches the traffic flowing through the designated 0-system board to the 1-system board 21 by manually inputting a command using the maintenance terminal (step S11). Next, by manually inputting a command by the operator, the route of the traffic flowing through the 0-system multiplexing / separating board 40 is fixed to the 0-system multiplexing / separating board 40 (step S12).
[0035]
After the 0-system board 20 is removed in this state, a new 0-system board 20 is inserted into the node #A (steps S13 and S14). Then, the operator manually issues a switchback command for switching back the route of the detouring traffic to the board 20 and a command for releasing the prohibition of the switching control in the multiplexing / demultiplexing unit in the apparatus. Then, the prohibition of the switching control in the multiplexing / demultiplexing unit in the apparatus is released, and the traffic flowing through the 1-system board 21 is switched back to the 0-system board 20 (steps S15 and S16).
[0036]
Comparing the procedure in FIG. 4 with the procedure in FIG. 9, all of the procedures (steps S11, S12, S15, S16 in FIG. 9) conventionally performed manually are performed by the switching control signal generation unit 7a in FIG. Automatically implemented. Moreover, the necessary commands are automatically generated, triggered by the removal or insertion of the board itself. Thus, the operator only needs to remove the board from the node, and since the traffic detour processing is performed on the machine side, the operator's labor can be greatly simplified.
[0037]
FIG. 5 is a diagram showing a traffic path when the 0-system multiplexing / demultiplexing board 40 is inserted and removed in the configuration of FIG. The zero-system multiplexing / demultiplexing substrate 40 also includes an ejector 32 and a switch 33, as in the configuration of FIG. Before the 0-system multiplex / separation substrate 40 is removed, the ejector 32 is pulled out, whereby the substrate ID of the 0-system multiplex / separation substrate 40 is notified to the main control unit 7. Then, the traffic flowing through the 0-system multiplexing / separating board 40 is switched to the 1-system multiplexing / separating board 41, and the path is indicated by a thick arrow in FIG.
[0038]
FIG. 6 is a flowchart for realizing the traffic route shown in FIG. In FIG. 6, when the 0-system multiplexing / demultiplexing substrate 40 is removed from the node #A, the ejector 32 is pulled out (step S61), and the switch 33 is turned on. As a result, the switching control signal generator 7a is notified of the notification signal c including the board ID 35a of the 0-system multiplexing / demultiplexing board 40, and switches the traffic flowing through the 0-system multiplexing / separating board 40 to the 1-system multiplexing / separating board 41. Is generated. Further, the redundancy switching in the HS interface unit and the LS interface unit is prohibited, and a fixing command for fixing a traffic route is generated.
[0039]
These commands are given to the internal multiplexing / demultiplexing unit, the HS interface unit, and the LS interface unit, respectively, whereby the traffic flowing through the 0-system multiplexing / demultiplexing board 40 is switched to the 1-system multiplexing / demultiplexing board 41 side. The traffic flowing through each of the HS interface unit and the LS interface unit is fixed (step S62).
[0040]
When the 0-system multiplexing / demultiplexing board 40 is inserted into the node #A from this state (step S63), the ejector 32 of the board is pushed into the fixed position, and the switch 33 is turned off. As a result, the switching control signal generation unit 7a releases the switchback command for switching the route of the detouring traffic back to the 0-system multiplexing / demultiplexing board 40 and the inhibition of the switching control in the HS interface unit and the LS interface unit. And a command to be controlled are given to each control target.
[0041]
Then, the traffic flowing through the 1-system multiplexing / demultiplexing board 41 is switched back to the 0-system multiplexing / demultiplexing board 40, and the prohibition of the switching control in the HS interface section and the LS interface section is released (step S64). Thus, the maintenance work of the 0-system multiplexing / separating substrate 40 is completed.
[0042]
FIG. 7 is a diagram showing a traffic path when the 0-system high-speed interface board 50 is inserted and removed in the configuration of FIG. The 0-system high-speed interface board 50 also includes an ejector 32 and a switch 33, as in the configuration of FIG. Before the 0-system high-speed interface board 50 is removed, the ejector 32 is pulled out, whereby the notification signal c including the board ID 35a of the 0-system high-speed interface board 50 is notified to the main control unit 7. In this way, the traffic flowing through the 0-system high-speed interface board 50 is switched to the 1-system high-speed interface board 51 side, and the route is indicated by the bold arrow in FIG.
[0043]
FIG. 8 is a flowchart for realizing the traffic route shown in FIG. In FIG. 8, when the 0-system high-speed interface board 50 is removed from the node #A, the ejector 32 is pulled out (step S81), and the switch 33 is turned on. As a result, the board ID of the 0-system high-speed interface board 50 is notified to the switching control signal generation unit 7a, and a switching command for switching traffic flowing through the 0-system high-speed interface board 50 to the 1-system high-speed interface board 51 is generated. In addition, a fixed command for prohibiting redundant switching in the multiplexing / demultiplexing unit in the device and fixing a traffic route is generated.
[0044]
These commands are given to the HS interface unit, the in-device multiplexing / demultiplexing unit, and the LS interface unit, respectively, whereby the traffic flowing through the 0-system high-speed interface board 50 is switched to the 1-system high-speed interface board 51 and In the inner multiplexing / demultiplexing unit, the traffic flowing through each is fixed (step S82).
[0045]
When the 0-system high-speed interface board 50 is inserted into the node #A from this state (step S83), the ejector 32 of the board is pushed into the fixed position, and the switch 33 is turned off. Accordingly, the switching control signal generation unit 7a provides a switching command for switching the route of the detouring traffic back to the 0-system high-speed interface board 50, and canceling the prohibition of the switching control in the multiplexing / demultiplexing unit in the device. And a command, and give each command to the control target.
[0046]
Then, the traffic flowing through the 1-system high-speed interface board 51 is switched back to the 0-system high-speed interface board 50, and the prohibition of the switching control in the multiplexing / demultiplexing unit in the device is released (step S84). Thus, the maintenance work of the 0-system high-speed interface board 50 is completed.
[0047]
As described above, in the present embodiment, the ejector 32 that is operated in accordance with the insertion and removal of the board and the switch 33 that operates in conjunction with the ejector 32 are provided on the board that is provided to be inserted into and removed from the node #A. When the ejector 32 is pulled out to remove the board, the switch 33 is turned on, and accordingly, a notification signal including the board ID is notified to the main control unit 7 of the node #A. The main control unit 7 uses the switching control signal generation unit 7a to perform switching control for diverting traffic flowing through the 0-system board 20 to the 1-system board 21 before the 0-system board 20 notified of the board ID is removed. The signal b is automatically generated and supplied to each functional block of the high-speed interface unit, the internal multiplexing / demultiplexing unit, and the low-speed interface unit.
[0048]
In this way, a necessary and appropriate switching sequence procedure is automatically performed in conjunction with the state of the ejector on the substrate. Therefore, when removing the substrate, the procedure conventionally performed manually is automated, and the labor of the operator can be greatly reduced. Also, even if an unintended board is accidentally removed, traffic flowing through this board is already diverted to another board. Therefore, adverse effects on traffic can be minimized.
[0049]
From these facts, it is possible to provide a node device and a substrate handling method capable of simplifying the operation procedure in substrate maintenance, thereby improving convenience and preventing operation errors.
[0050]
Note that the present invention is not limited to the above embodiment. For example, in the present embodiment, at least the board ID is included in the information notified from the board. Instead, the switching information indicating which part of the node device should be switched when the self is removed is stored in the memory 35 in advance, and when the switch 33 is turned on, the switching information is stored together with the board ID together with the node ID. The device may be notified. By doing so, the processing load on the node device can be reduced.
[0051]
In addition, various modifications can be made without departing from the spirit of the present invention, such as the number of states that the switch can take on the substrate and the configuration of the switch itself.
[0052]
【The invention's effect】
As described above in detail, according to the present invention, it is possible to provide a node device and a substrate handling method capable of simplifying a work procedure in substrate maintenance, thereby improving convenience and preventing a work error.
[Brief description of the drawings]
FIG. 1 is a diagram showing a configuration of a digital signal transmission system in which a node device according to the present invention is installed.
FIG. 2 is a functional block diagram showing a main part configuration of a node #A shown in FIG.
FIG. 3 is a block diagram schematically showing a configuration of a board provided to be able to be inserted into and removed from node #A shown in FIG. 2;
FIG. 4 is a flowchart showing a processing procedure when inserting and removing the 0-system low-speed interface board 20 from the state shown in FIG. 2;
FIG. 5 is a diagram showing a traffic path when inserting and removing the 0-system multiplexing / demultiplexing board 40 in the configuration of FIG. 2;
FIG. 6 is a flowchart for realizing the traffic path shown in FIG. 5;
FIG. 7 is a diagram showing a traffic route when the 0-system high-speed interface board 50 is inserted and removed in the configuration of FIG. 2;
FIG. 8 is a flowchart for realizing the traffic route shown in FIG. 7;
FIG. 9 is a flowchart showing a processing procedure at the time of substrate maintenance in a conventional node device for comparison.
[Explanation of symbols]
SL… Service line
PL… Protection line
Z: Low order group line
CB: Control bus
DB: Data bus
#A to #G ... nodes
20, 22, ..., 2n-2, 2n ... 1-system low-speed interface board
21,23 ~, 2n-3,2n-1 ... 0 system low speed interface board
7 ... Main control unit
7a: Switching control signal generator
11-1n ... Lower device
200 ... Monitoring control device
31 ... Connector
32 ... Ejector
33 ... Switch
34 Control chip
35 ... Memory
35a ... board ID
36 ... Internal bus
40 ... 0 system multiplex / separation substrate
41: 1-system multiplex / separation substrate
50 ... 0 system high-speed interface board
51 1-system high-speed interface board

Claims (6)

A node device provided in an information transmission system including a transmission path and transmitting traffic via the transmission path,
A movable position fixing mechanism that is provided so as to be insertable into and removable from the node device main body and is capable of attaching and detaching itself to and from the node device main body, and is interlocked with two states of a fixed state or a fixed release state taken by the position fixing mechanism. And a plurality of boards which are provided with a switch that takes at least two states, and are provided with a working system and a standby system that are associated with each other, and
Switching means for switching the route of the traffic flowing through the board to a corresponding system side board according to a given control command,
Recognizing the state of the position fixing mechanism in each board from the state of the switch, generating the control command when the position fixing mechanism is in the unlocked state, giving the control command to the switching means, A switching control signal generating means for switching a route of the traffic flowing through the switch to a corresponding system-side board. The board includes a notification unit that notifies the switching control signal generation unit of notification information including at least its own identification information according to a change in the state of the switch,
2. The node device according to claim 1, wherein the switching control signal generation unit generates the control command based on notification information notified from the board. When each of the plurality of boards includes a plurality of functional blocks, and the traffic passes through the plurality of functional blocks,
The switching control signal generating means includes:
A switching command for switching the route of the traffic flowing through the board to be removed to a corresponding system side board in a functional block in which the board to be removed is mounted;
The node device according to claim 1, wherein a fixed command for fixing a route of the traffic in a functional block other than the functional block on which the board to be removed is mounted is generated. The switching control signal generating means, when the board is inserted into the own device, generates a switchback command for returning the switched traffic path to the board, and sends the switchback command to the switching means. 2. The node device according to claim 1, wherein the node device gives the traffic route back to the board. A movable position fixing mechanism that is provided in an information transmission system including a transmission path and that is provided so as to be able to be inserted and removed from a node device that transmits traffic through the transmission line, and that is capable of attaching and detaching itself to and from the node device body, A switch that takes at least two states in conjunction with two states of a fixed state or a fixed state released by the position fixing mechanism, and a board that is made redundant by including a working system and a standby system that are associated with each other. A method of handling a substrate of a node device for handling,
A first step of recognizing a state of the position fixing mechanism on each substrate from a state of the switch;
A second step of switching the route of the traffic flowing through the board to a board on the system side corresponding to the board when the position fixing mechanism is in the unlocked state as a result of the recognition in the first step. A substrate handling method for a node device, comprising: The method according to claim 5, further comprising a third step of returning the route of the switched traffic to the board when the board is inserted into the node apparatus.

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