JP2002125043A - Exchange - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently realize a synchronous confounding function by avoiding the increases of the numbers of cables used for interconnecting operation and standby systems, fault detecting points, and fault information methods, etc., even when the number of functional blocks constituting an exchange increases and synchronizing the transmission of data between systems. SOLUTION: The synchronous confounding function is only given to a fixedly mounted functional block, and synchronous confounding signals which are transmitted from and received by the fixedly mounted functional block are distributed to additionally provided functional blocks through a bus connecting constitutions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exchange for switching connection of telephone and other communication signals. The present invention is used for a duplex switch having an active system and a standby system so that connection exchange is not interrupted even if a failure occurs in one system. In particular, the present invention relates to a transmission signal synchronous confounding technique between a functional block of an active system and a functional block of a standby system.

[0002]

2. Description of the Related Art In many cases when an exchange system is constructed, there are two systems, an operation system and a standby system, and a redundant configuration is adopted. Designed to have no effect. The same applies to the tone and PB signal required for a call transmitted from the signal processing device, which is one of the functional blocks of the exchange, and the operation must be normally switched to the other standby system when the operation system is stopped. The tone and PB must not be interrupted. For that purpose, the active and standby tones, P
A signal for synchronizing the state of the B signal is a confounding signal, and among them, a signal for synchronizing data to be transmitted is a transmission synchronizing confounding signal.

FIG. 3 shows a functional block A constituting an exchange.
This is a configuration for realizing the conventional synchronous confounding function in the case where B and B exist. Conventionally, they are connected as shown in FIG. The function block B has a function of transmitting a signal,
The function block A controls the function block B.

[0004] In order to synchronize the signals transmitted from the functional block B of the active system and the standby system, it is necessary to mutually connect the active system and the standby system to transmit and receive a signal for synchronization.
In the conventional configuration, as the number of function blocks B controlled by the function block A increases, the number of cables required between the operation system and the standby system increases. FIG. 4 is a diagram showing a configuration of a transmission signal synchronous confounding function when there are a plurality of functional blocks B. A prior application in which the present inventor is the inventor has already been disclosed as a technique for realizing a confounding function of an exchange (see Japanese Patent Application Laid-Open No. 2000-32574).

[0005]

According to FIG. 3, when transmitting a signal from the functional block B, in order to synchronize the data transmitted from each of the operation and standby systems with each other, the operation of the functional block B and the standby system are performed. Each must be connected and provide a confounding signal.

In this connection configuration, as shown in FIG. 4, if several or more types of functional blocks B are connected to each other, a synchronous confounding signal is generated by the number of functional blocks B in order to synchronize. Required.

[0007] In such a format, the number of synchronous confounding signals is required for the number of mounted components, and the number of cables accommodated must be increased. In addition, the number of points for monitoring the normality of the synchronous confounding signal and the number of notification methods at the time of failure increase, which makes the system extremely uneconomical and does not allow the design to be slim.

The present invention has been made in view of such a background, and even when the number of functional blocks constituting an exchange is increased, the number of cables for interconnecting the working system and the spare system is increased, and a fault detection point is provided. It is an object of the present invention to provide an exchange which can avoid an increase in the number of failure notification methods and an increase in the number of failure notification methods and can synchronize transmission of data between systems. SUMMARY OF THE INVENTION It is an object of the present invention to provide an exchange that can efficiently realize a synchronous confounding function.

[0009]

According to the present invention, only a fixedly mounted function block has a synchronous confounding function, and for an additional function block, a synchronously confounding signal transmitted and received by the fixedly mounted function block is transmitted. Are distributed by the bus connection configuration, thereby forming the minimum necessary connection configuration and efficiently realizing the synchronous confounding function.

That is, according to the present invention, a plurality of functional blocks provided in an active exchange, a plurality of functional blocks provided in a standby exchange, and means for synchronizing a transmission signal between these functional blocks. And an exchange comprising:

Here, the feature of the present invention is that any one of the functional blocks provided in each of the operation system and the standby system is defined as a fixed block, and the other is defined as an extension block. The means for performing the transmission signal synchronous confounding includes a means for performing the transmission signal synchronous confounding between the working system and the standby system between the fixed blocks, and one fixed block and a plurality of additional blocks in the working system and the standby system. Bus connection means for interconnecting each other in the system. It is desirable to use the least common cycle of the period of the synchronous confounding signal required for each additional block with respect to the period of the synchronous confounding signal of the fixed block.

Thus, even when the number of functional blocks constituting the exchange increases, it is possible to avoid an increase in the number of cables for interconnecting the working system and the standby system, an increase in failure detection points, an increase in failure notification methods, and the like. Data transmission can be synchronized. Therefore, the synchronous confounding function can be efficiently realized.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An exchange according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a block diagram of the exchange according to the embodiment of the present invention. FIG. 2 is a diagram showing a confounding signal cycle of each functional block B in the exchange according to the embodiment of the present invention.

According to the present invention, as shown in FIG. 1, a plurality of functional blocks A, B,.
A plurality of functional blocks A and B provided in a standby exchange
And means for performing synchronous confounding of transmission signals between these functional blocks B to.

Here, the feature of the present invention is that the functional blocks B provided in the operating system and the standby system, respectively, are provided.
The function block B is defined as a fixed block, the other function block B is defined as an extension block, and the means for performing the transmission signal synchronous confounding is a function block between the fixed block function block B and the operating system. A signal line 1 as means for performing synchronous confounding of a transmission signal with the standby system, a function block B which is one fixed block in the active system and the standby system, and a function block B ~ which is another additional block are provided in each system. And a bus 2 as a bus connecting means for interconnecting the two.

FIG. 2A shows the period of the confounding signal required in the function block B, FIG. 2B shows the period of the confounding signal required in the function block B, and FIG. 2 shows the period of the necessary confounding signal, and FIG. 2D shows the period of the necessary confounding signal in the function block B. The period of the synchronous confounding signal required in each of the additional blocks, ie, the function blocks B to, uses the least common multiple of the period of the synchronous confounding signal of the functional block B which is a fixed block.

More specifically, as shown in FIG. 1, a signal line 1 as a means for synchronizing transmission signals between the active system and the standby system between functional blocks B as fixed blocks,
A bus 2 is provided as a bus connection means for interconnecting the functional block B as one fixed block and the functional blocks B to B as additional blocks in the active system and the standby system.

Hereinafter, embodiments of the present invention will be described in more detail.

The function block B is a function block controlled by the function block A and provided with a function of transmitting tones and PB data, and is a part that needs to synchronize transmission.
A fixed block that is always mounted among a plurality of function blocks B controlled by the function block A is set as the function block B. Rather than having a confounding function between each of the plurality of functional blocks B to, use this fixedly mounted function block B and provide only the fixedly mounted function block B with a confounding function, and use the confounding signal used here. A bus is also connected between the other functional blocks B to and used for multi. Synchronization of tones and PB data transmitted from each of the functional blocks B to when a plurality of such functional blocks are mounted is collectively performed, and the functional blocks B to
A synchronous confounding function is realized.

As described above, the transmission signal synchronization between a plurality of connected functional blocks B is performed by giving the confounding function only to the portion between the fixedly mounted functional blocks B, thereby realizing a lean configuration and improving efficiency. The system can be operated well.

FIGS. 2A to 2D show functional blocks B
機能 Function block B〜 indicates the period of the synchronous confounding signal. Since the synchronous confounding signal is used to synchronize the tone and the PB signal, if the period of the tone or the PB signal to be transmitted differs, the required period of the synchronous confounding signal also changes.

As shown in FIG.
, The period of the signal necessary for synchronous confounding differs for each functional block B. Therefore, as shown in FIGS. 2A to 2D, the cycle of signals transmitted and received in the fixedly mounted function block B is determined by using the least common multiple period of the signal required in each of the function blocks B to. I do.

By using the signal of the least common cycle as described above, the function blocks B to
If the signal is multiplied using a counter or the like at the time of reception, a signal having a necessary period can be easily generated.

[0024]

As described above, according to the present invention,
Even when the number of functional blocks that make up the exchange increases, it is possible to avoid the increase in the number of cables for interconnecting the working system and the standby system, increase the number of fault detection points, increase the number of fault notification methods, etc., and synchronize the transmission of data between systems. Can be taken. Therefore,
The synchronous confounding function can be realized efficiently.

[Brief description of the drawings]

FIG. 1 is a block diagram of an exchange according to an embodiment of the present invention.

FIG. 2 is a diagram showing a confounding signal cycle of each functional block B in the exchange according to the embodiment of the present invention.

FIG. 3 is a diagram showing a configuration for realizing a conventional synchronous confounding function in a case where functional blocks A and B constituting an exchange are present.

FIG. 4 is a diagram showing a configuration of a transmission signal synchronous confounding function when there are a plurality of conventional function blocks B;

[Explanation of symbols]

 1 signal line 2 bus A, B-functional block

Claims (2)

[Claims] 1. A system comprising: a plurality of functional blocks provided in an active exchange; a plurality of functional blocks provided in a standby exchange; and means for synchronizing transmission signal synchronization between these functional blocks. In the exchange, one of the functional blocks provided in each of the working system and the standby system is defined as a fixed block, and the other is defined as an extension block. Means for performing synchronous confounding of transmission signals between the active system and the standby system between blocks, and bus connecting means for interconnecting one fixed block and other extension blocks in the active system and the standby system in each system. An exchange characterized by comprising: 2. The exchange according to claim 1, wherein the period of the synchronous confounding signal required for each additional block uses a least common multiple period with respect to the period of the synchronous confounding signal of the fixed block.