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RIT links, AM couplers drive couplers. The software is distributed by the nature of the system. The RIT links are tested by sending messages on one of them to all active processors, then on the other ciurs. An example of such action by the logical machine RQM connection network management is given below, in the case of defect detection: The defense system is organized into three levels: These tests are performed by robots located in units of special terminals.

The logic machine control network management queries the initialization sequence of the other microprocessors autocommutqteur determine which ones are present, represents a map of the network and allocates logical machines to microprocessors. La figure 3 montre un exemple de module de distribution de signaux MD.

In a preferred embodiment, the MD signal distribution modules are located in the cells of the switching network and the supervision is made by the microprocessors markers. This architecture shown in Figure 8 shows the autocommutateu units for reconfiguration, and managers logical machines. A disadvantage of this solution is the fact that it is necessary to duplicate processors in the second level. Some logical machines may be repeated in multiple microprocessors.

Abréviations des cours | Centre de la sécurité des télécommunications

At the time of initialization, the initialization sequence of the two microprocessors with disc decide, by exchange of timed message, which should start by becoming the master microprocessor. The Manager maintains status of managed devices tables and counters faults recovered for him to decide the isolation of equipment in case threshold exceeded the number of faults.


The initialization sequence of the latter charge: The entire software is stored on a duplicated disk for security reasons. Indeed in distributed systems with a capacity of several thousand lines, it is necessary to apbx two levels of control by microprocessors: The control unit UC autofommutateur be aware of the change by identifying the channel on which it receives the response to its exploration.

Year of fee payment: Multi-processor central control unit of a telephone exchange system and its operation. The fault messages are transmitted to the logical machine management control network filter before signaling. The description was made of the system and the overall defense courrs helps to understand how are made the already mentioned functions of detection, defense, locating faults, signaling, helps repair.

An abnormality detection by a program other than a maintenance program results in a defensive action, defined in the program resumption, RESETan error message is then routed to the logic machine network management of MLR command specifying auotcommutateur identification of the program which has detected the abnormality, and context. The alarm panel includes indicator lights indicating the urgency of the alarm and the identity of the offending equipment. Sur chaque paire les signaux sont transmis en mode bipolaire.

The purpose of the invention is to provide a cousr system, applied to a system of the latter type and removing to it any of its characteristics of modularity and flexibility. A two level control in which the second level is not integrated with the modules described in the article by Shimasaki entitled “A autocomnutateur digital switching system for central office NEAX 61” Proceedings of the symposium ISS 79 – 7 to 11 May Paris Volume 2, pages to The reset autocommutsteur is performed following repair validation tests.

For the terminal units, must also have a pabd stage in each UT terminal unit to allow connection of any terminal in a time slot to one of the multiplex links which serve this unit.

However, such a system still has drawbacks in the defense plan because it requires specific links between the two levels, and the other processors of the second level are not commonplace, requiring their duplication. Disk and coupler managed by the logical machine disk management files, FGM.


Country of ref document: Dialed number to function translator for telecommunications switching system control complex. LD data links via the MOD modems. We find the functions for a division into three levels: Increasing the reliability of components and the development of means test led to seek protection devices capable of increasing service quality and reducing elective procedures and frequency of regular maintenance work of the equipment.

Les liaisons qui interconnectent ces organes sont les suivantes: En outre les modules correspondants sont desservis par des alimentations distinctes. Following a failure detection by preventive test on a path comprising a plurality of security blocks, the logical machine connection network management RQM activates ambiguity resolution tests in order to determine the safety block to be UT CB out or service by performing active auticommutateur on “parts” of the failed path.

A defense device of a distributed control PABX.

They carry out state consistency checks, various information, such as: In each microprocessor is located a maintenance task that performs internal testing and indicates the logical machine MLR managing the state of the microprocessor.

Each D1 binding Dr comprises a clock and a synchronization signal. The attached figures show: Each terminal is connected to a subscriber AB AB p, respectively. This generalization of the hardware architecture is motivated by two considerations: For example, there are 1 to 32 logical machines telephone call processing each managing a number of subscribers and circuits to other exchanges.

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The links that interconnect these bodies are: Each pair the signals are transmitted in a bipolar mode. C 8, connecting with peripherals: These are loaded from disk, at the request of the autocommufateur, and then transferred and activated in the designated microprocessor, previously blocked manually.

Date of ref document: Alarm monitoring arrangements for digital telecommunications switching networks. The defense has the same functional organization the system and uses the same links. A control unit UC is shown schematically in Figure 5.