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: Put the fun back into computing. Use Linux, BSD.

This page enables us to quickly perform a side-by-side comparison of the packages available in two different distributions, or in two different versions of the same distribution. An example of such action by the logical machine RQM connection network management is given below, in the case of defect detection: Technological developments in the telecommunications industry, linked to the integrated and that of the electronic computer, resulted in a very rapid development of user services and resources available to the operating personnel exchanges.

The two clock and synchronization circuits CBT of a group are connected to different planes of the switching network and distribution modules independent MD signals.


Each RIT RIT bond and 2 comprises five son pairs to each station connected, providing the calling features, access authorization, clock, transmission and reception. For the terminal units, must also have a switching 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.


Programme amovible de test de localisation. The control autocmmutateur is thus replaced – the user’s point of view – a logical network of machines. Furthermore, the monitoring logic machine provides testing capabilities and defense of the controller, data management and help with the development.

The MTA call processing logic machine control in applicant stall phase, active control of the conversation path including the network.

The two autocommutateuf are managed by separate microprocessors. The fault messages are transmitted to the logical machine management control network filter before signaling. Malfunction monitor control circuitry for central data processor of digital communication system.

Figure 3 shows an example of MD signal distribution module. La figure 3 montre un exemple de module de distribution de signaux MD.

Abréviations des cours | Centre de la sécurité des télécommunications

The links that interconnect these bodies are: The logic machine control network management queries the initialization sequence of autocommutatehr other microprocessors to determine which ones are present, represents a map of the network and allocates logical machines to microprocessors. The defense has the same functional organization the system and uses the same links.

Of “watchdogs” control the occupancy times of the main paths of information and release them in case of overflow.

In addition the corresponding modules are served by separate power supplies. A defense of a distributed control PABX in a microprocessor control unit and in microprocessor terminal units connected to a time switching network. The architecture described relates autocommutateir an auto switch for telematics applications, but some details of the example specifically concern a telephone exchange. A French system of this type is described for example in the patent application No.


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The defense autoocmmutateur locally and call made to the next level when there is an external impact to pabs body. AR and AM couplers allow access by semaphore mode and are for example of the type described in the French patent application already cited by the applicant.

In this way, reconfigurations are transparent to most programs. Breakdowns and defects are detected as close as possible to their origin.

It also controls the line circuits LC via an IS interface supervision and control. The addressing of logical machines is done by name rather than by physical address.

For this, the MLM maintenance logical machine uses a topological description table of all equipment. A control unit UC is shown schematically in Figure 5. The IF training sequence of each microprocessor contains a simplified control of the whole CPU card microprocessor, memory, coupler AR looped organized test for the location of the faulty card.

Integrated in the logical machines Management MGT terminals. A preferred embodiment of the invention will be described as an example. 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.

Each pair the signals are transmitted in a bipolar mode.