JPS60178749A - Circuit switching system - Google Patents

Abstract

PURPOSE:To facilitate an easy switching operation and to reduce the cost for a communication controller containing a control processor, by providing a means which resets a package corresponding to a circuit and also cuts the connection between a communication circuit and said package when a power supply is applied to the package separately from a unit. CONSTITUTION:A power supply cable 105 is connected to a power supply connector 24 in order to separate a faulty using circuit corresponding package unit 2-i from a unit. Thus a potential is applied to a signal line 10 to supply an information to a processor 5 with an interruption, etc. At the same time, a relay Re 1 is actuated by the package 2-i to cut off the power supply of its own in a relay circuit 45-i. Thus communication circuits 100-1-1...100-1-j are connected to spare circuit corresponding circuits 40-1...40-j respectively. At the same time, a using circuit corresponding circuit 20-j is cut from circuits 100-1-1...100-1-j by a relay circuit 25-i. Hereafter the processor 5 performs communication by means of a spare circuit corresponding package 4-i.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention provides a line side switching system, more specifically, a communication control device that does not cause any disturbance to the system node.
In addition, the present invention relates to a method for quickly switching over a communication module installed in a network (which has caused a problem) to a backup network.

Conventional technology and problems Conventionally, in packet switching systems using communication control equipment, when multiple line compatible circuits are accommodated in one package,
If a specific line support circuit becomes faulty, the package containing the faulty line support circuit also accommodates other active lines, so subscribers of these active lines will be notified. It was necessary to replace the package. Therefore, replacing the line compatible package has become very time consuming and complicated. In order to eliminate this effect, if one package is used for one line, a package, a connector, etc. are required for each line, which has the drawback of increasing the mounting cost. Another method is to insert a line-compatible package into the system, reset it from the program, and then connect the line-compatible circuit and the communication control device body using a connection package, etc. However, since the operation is complicated and a connection package is required, the cost is high.

Purpose of the Invention The present invention provides a method for replacing a line-compatible package that accommodates a plurality of lines in one package without causing any disturbance to the system bus, and in which the communication line installed in the faulty package can be replaced. To provide a line switching method for quickly switching a communication line to a backup line compatible package, and quickly switching back a currently communicating line housed in the backup line compatible package to the current line compatible package. purpose.

Examples of the invention Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing the configuration of an embodiment of the present invention.
is the system bus of the communication control unit, 2-1 (L=4.2
．． ......) is the number corresponding to the first working line (1"'
1 + 2 +...) is a spare recall compatible package, 5 is a processor that executes the program of the communication control device and controls each package, etc., 6 is a memory that stores programs and data, 2O-j (j=L2,...
...) is the j-th line compatible circuit pin 2 in the package
22 is a transmission control procedure circuit, such as CCITT Recommendation i-'J
(1""1+2+... j = 1, 2
,...) is the j-th communication line of the first line compatible package, 101 and 102 are the common buses for reception and transmission connected to the system bus, respectively, 04 is the power line, and 105 is the line compatible package. a power cable for supplying power to the package and spare line-enabled package;
24゜24' is the power connector, 25 1' (1-1+
2 +...) is a means for cutting off the connection between the communication line and the line correspondence circuit provided between the communication zoo-t-J and the transmission interface circuit 23, and this embodiment It consists of a relay circuit.

Line compatible package 2-1 (2-1, 2-2...
etc.) all have the same configuration, and in each line compatible package, the line compatible circuits 2O-j (20-
1, 20-2, etc.) also have the same configuration.

The spare line support package 4-L has the same configuration as the working line support package 2-i, and is the same as the active line support package 2-i of the unit (package shelf).
is mounted at a predetermined position corresponding to the mounting position of, for example, an adjacent position.

In this way, when a pair of active and spare line compatible packages 2-1 and 4-t are mounted in adjacent positions within the unit, terminal A is connected to the signal line 107 according to the connection configuration on the back of the unit. , B are connected to the terminal A of the standby line cage 4-i via the control signal line 106, as will be described later.

The communication lines 100-i-j are connected to communication terminals or other communication control devices, and data received from the communication lines is transmitted to, for example, a transmission interface circuit 23, a transmission control procedure circuit 22, a bus 102, The data is temporarily stored in the memory 6 via the system bus 1t, and the data in the memory 6 is read out, reaches the transmission control procedure circuit 2z via the system bus 101, and is further transferred to the transmission interface circuit 23 and the system. It is transmitted to other communication terminals etc. via the communication line 100-i-jt-.

Each package is connected to the unit by a rear (R side) connector.

Similarly, when the power supply package 3 is mounted in a unit, it can receive power from the connector on the rear surface (R side) and output it to the connector 24- on the front surface (F side). Connect the power cable 105 to connectors U and 24 on the front of the package (F side) only when replacing the cage.
’.

This includes power supply package 3 and power cable 105.
The unit is configured with a separate means for supplying power.

Line compatible package 2-l (i=1.2...
Rel in ...) is a relay, which is included in the relay circuit 25-1 constituting the connection breaking means, and is only activated when power is supplied by the power cable.
-1 contact opens to cut off the connection between the communication line 1oo -t -j and the transmission interface circuit 23, and if the power cable 105 is not connected and there is no current, then it is restored. and the above contacts are closed,
Connections with communication lines 100-i-j are configured.

Here, the power cable 105 is inserted into the front of the package only when replacing the package.

FIG. 2 is a diagram showing the connection relationship between the current line-compatible package and the standby line-compatible package when they are mounted on the @ contact position of the package rack.

In the figure, 2-1 is the current line compatible package, 4-
1 is a backup line compatible package.

Figure 1 also shows the internal configuration of the spare line support package.

Current line compatible package 2-1゜2-1 shown in Figure 2
The configuration is the same as that of . In addition, in the spare line support package 4-i in FIG. 2, 40a (j = 1, 2
, ...) is the j-th line compatible circuit in the package, 41 is a power-on reset circuit, 42 is a transmission control procedure circuit, for example, CCITT recommendation X, 25 level 2 processing circuit, 43 is a transmission ink face circuit, 45-i (t==112+...) is the communication line 100-i-j (i=1+2+...)
j = 1, 2, ...) and the transmission interface circuit 43; 106 is a control signal line of the relay circuit from the current line compatible package to the spare line compatible package; This is a signal line for notifying all processors 5 that the power cable is connected to the current line compatible package. As in FIG. 1, the power cable 105 is inserted into the front of the package only when replacing the package.

The power supply related terminal A of the current line compatible package 2-i is connected to the signal line 107, and the terminal B is also connected to the spare line compatible package 4 mounted at a predetermined position (adjacent position) via the control signal line 106. -1 terminal A. At this time, the terminal B of the spare line compatible package 4-i is left unconnected (not connected to anything).

Next, this operation will be explained. If a specific recollection support circuit of a recollection support package that accommodates multiple lines becomes faulty, the system prevents disturbances to the communication control equipment due to power fluctuations before inserting the spare line support package into all units. In order to do this, all power is supplied from the power supply package 3 to the stain source cable 105 to the spare line compatible package 4-1 via the power connector 44 provided on the front of the package. When power is supplied to the spare line compatible package 4-i, the power supply voltage becomes stable several hundred milliseconds later, and a reset signal is sent from the power-on reset circuit 41 to the reset line RES, and the line compatible circuit 4
0-1...40-j are reset, and the signal output terminals sent from the line corresponding package to the system bus enter a high impedance state. Thereafter, the spare line support package 4-i is inserted into a position adjacent to the currently used line support package 2-i that has caused the failure. In addition, by connecting the power cable 105, the υ relay Rel operates, and the transmission line 100-1 is connected to the relay circuit 45-1.
Since i-j and the spare line corresponding circuit 40-j are disconnected, the spare line corresponding circuit 40-1...40
-j output is the current line compatible circuit 20-1...
It is never connected to the output of 20-j. After inserting the spare line compatible package 4-1 into the predetermined position of the unit, when the power cable 105 on the front of the package is disconnected, the operating power supply of the relay circuit 45-j of the spare line compatible package is switched to the adjacent current one. Control signal line 1 from package
Since it is supplied by 06, the communication line 100-i-
j and the spare line corresponding circuit 40-j remain disconnected.

In this state, the program performs various initial settings for the backup line support package 4-1.

Next, when the power cable 105\i- is connected to its power connector 24 in order to disconnect it from the faulty current line compatible package 2-tl unit, a potential is applied to the signal line 107, which causes the processor 5 to Notifications will be made via interrupts, etc. At the same time, the current line compatible package 2
-i operates relay Rel, which is supplied from the package 2-i via the control signal 1i06, and the relay Rel in the 7'C+J relay path 45-1 is powered off, so the communication port i 100-1-1・・・・・・ioo −i −
j and spare recollection corresponding circuit 40-1...40-j
is connected to. At the same time, the current line compatible circuit 20-j and the communication line 100-1-1...too -t -
j is disconnected by the relay circuit 25-i. Thereafter, the processor 5 uses the above-mentioned spare line support package 4-11 to perform communication. In this state, the failed recollection support package 2-1 is removed from the unit. When switching packages, there is a momentary interruption in the communication line and communication data is lost, but this is detected by the transmission control procedure, such as CCITT Recommendation X, 25 Level 2, in the same way as a momentary interruption in the transmission path is automatically recovered by the retransmission means so that the subscriber's data is not lost.

Next, a procedure for switching back from the backup line-compatible package to the current line-compatible package will be explained. First, in the same manner as in the procedure for replacing the backup line-compatible package described above, before inserting the repaired current line-compatible package into the unit, power is supplied to the package through the power cable 105.

For the current line-compatible package, for example 2-i, which is not inserted into the unit, when power is supplied, the power supply voltage stabilizes several hundred milliseconds later, and a reset signal is sent from the power-on reset circuit 21 to the reset line RES, and the line is connected. The corresponding circuits 20-1...20-j are reset, and the system bus l from the line corresponding package 2-i is reset.
The signal output terminal for sending out signals is not in a high impedance state, so that there is no adverse effect when the recirculation compatible package is connected to the system bus. When this current line compatible package 2-1 is inserted into the unit, the power cable 10
5 is connected, power is supplied to the relay circuit 25-1 (relay Red) of the line compatible package 2-i, and the output of the current line compatible package 2-i is connected to the communication line zoo - It is not output at t-1. In addition, the power supply voltage of the relay circuit for the spare line compatible package 4-t is set to
Relay 1el operates at i, and relay circuit 2
5-1, the stain source is not sent to the control signal line 106 and the relay R of the spare line compatible package 4-i
Since el does not operate, the contacts of the relay are closed and shut down.
In this state, communications can continue using the backup line support package. In this state, the program performs various initial settings for the current line compatible package. Next, when the power cable 105 is unplugged from the connector 24 of the current line-compatible package 2-i, the processor 5 is notified by an interrupt or the like on the line 107. at the same time,
Since the power to the relay circuit of the current line-compatible package is cut off, the communication line 100-i-j and line-compatible circuit 2-j are connected, and the control signal line is connected to the relay circuit of the backup recall-compatible package. Since power is supplied through 106, the transmission line 100-1-j and the spare line corresponding circuit 40-j are disconnected. Thereafter, the processor 5 performs communication using the line compatible package.

Next, when the spare line compatible package is removed, the power cable 105 is connected to the spare line compatible package to prevent an adverse effect on the system when the package is removed. At the time of pan-cage switching, there is a momentary interruption in the communication line and the communication data is lost, but this can be detected by transmission procedure control such as CCITT Recommendation automatically recovered by the retransmission procedure.

As described in detail, according to the present invention, when replacing a line compatible package that accommodates a plurality of lines in one package in a communication control device with a spare line compatible package, the system bus of the communication control device This has the effect of allowing the communication line installed in the package that caused the failure to be quickly transferred to a backup line compatible package without causing any disturbance.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the configuration of one embodiment of the present invention, and a diagram showing the connection relationship between the two. 1... System bus of communication control device, 2-i (1=
1.2.・・・・・・)...1st line compatible' package, 3...Power supply package for supplying power to the line compatible package when replacing the package, 4-1(
1=1.2. ...)...Spare line compatible package, 5... Processor that executes the program of the communication control device, 6... Memory that stores the program and data, 20-j, 40-j ( j = 1.2.
・・・・J-th line compatible circuit in the package, 21.41 ・Power-on reset circuit, 2
2.42...Transmission control procedure circuit, 23.43...Transmission ink face circuit, 24.24', 44...Power connector, 25 i r45-1...Between communication line and transmission interface circuit Relay circuit provided in 10
0-1-j...J-th communication line of the first line compatible package, 101 and 102...Power cable for supplying power to the subpackage connected to the system bus, 106...Relay circuit control signal line, 1o7...
・Signal line for notifying the processor. Patent applicant Nippon Telegraph and Telephone Corporation

Claims (1)

[Claims] In a communication control device that accommodates a plurality of line compatible packages that accommodate a plurality of communication lines in one package, and includes a processor that controls the plurality of line compatible packages,
The above-mentioned line compatible package has a means for supplying power separately from the unit, a means that operates when the means is supplied with a stain source, and resets the corresponding line compatible package, and a stain source is also supplied from the power supply means. and a means that operates to cut off the connection between the communication line and the package, and when the line compatible package encounters a failure, after supplying a stain source to the spare line compatible package in advance by the power supply means, A line side characterized in that the line side is mounted at a predetermined position corresponding to the mounting position of the faulty line support package, and then the faulty line support package is pulled out, thereby restoring the connection disconnection means of the protection line support package. Replacement method.