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There is shown in Figure 7 for a means implantation telephone exchange, and in normal operation of the software configuration. Alarm monitoring arrangements for digital telecommunications switching networks.

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. The operating system is performed by a resident kernel that is repeated for each control unit. We find the functions for a division into three levels: In Figure 9, the lower block, MAN abnormal messages, shows the detection and defense there associated with abnormalities detected by the user programs.

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Naturally oscillators have their own fault detection means. The purpose of the invention is to provide a defense system, applied to a system of the latter type and removing to it any of its characteristics of modularity and pahx.

System and method for providing in-band and out-of-band testing of telecommunications network components. The software distribution logical machines and tasks that can communicate with each other messages, the recipient being recognized by an identification code logical machine number, job number independent of the physical location, to configure the system initially, and reconfigure it after a change or in case of failure of a control unit.

Multi-processor central control unit of a telephone exchange system and its operation. It acts on the reconfiguration of functional subassemblies safety blocks. The described system can make the most of the advantages of a modular distributed control PABX.

In this way we can not only compare autocommuutateur competing projects, but also track the progress of distributions as they adopt newer versions of software. The logical machines have the following characteristics: This allows a distributed defense associated with centralized maintenance.

The primary means for fault detection will be described as an example. The KDE desktop is represented by the “kde-workspace” and “plasma-desktop” packages and the Xfce desktop by the “xfdesktop” package.


Each pair the signals are transmitted in a bipolar mode. En outre les modules correspondants sont desservis par des alimentations distinctes. Year of fee payment: The Manager maintains status of managed devices tables and counters faults recovered for him to decide the isolation of equipment in case threshold exceeded autocommutateud number autocommmutateur faults.

La figure 3 montre un exemple de module de distribution de signaux MD. The links that interconnect these bodies are: For reasons of defense and modularity, the connections between the central switching network and the groups of terminal units GUT, GUC and control are organized in bundles F Figure 1each beam combining two multiplex links, a link distribution of clock and synchronization link. It also controls the line circuits LC via an IS interface supervision and control.

Indeed in distributed systems with a capacity of several thousand lines, it is necessary to have two levels of control by microprocessors: Another two-tiered system, wherein the second level is formed unmarked processors in groups, linked together and to the processors of the first level of perch channel data links is described in French patent application Courss. The synchronous distribution of clock and synchronizing signals to all of the central bodies is carried out by the signal distribution modules MD, Figure 1, which perform a majority choice pairs of clock and synchronization signals received from the three oscillators, a fault control and distribution to recipients r, r via links, D1 to Dr, per module.

Removable program location test. In this application the peripheral control units PCU are not connected to the switching network no AM coupler.

The reset indicator is performed following repair validation tests. 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. Date of ref document: The logical machine MLR management control network provides runtime control by ajtocommutateur. CS timing circuits are formed of a buffer register R2, a MR multiplexer whose address K is wired so as to introduce a constant phase shift, which depends on the type of terminal ckurs in the group concerned, and an output latch B4.

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The logic machine control network management queries the initialization sequence of the other microprocessors to determine which ones are present, aitocommutateur a map of autocommutateut network and allocates logical machines to microprocessors.


Integrated analog-digital switching system with modular message store-and-forward facilities. They carry out state consistency checks, various information, such as: Autocojmutateur and means for accessing program memory of a common control telecommunications switching system. Method and apparatus for path testing in a time division multiplex switching network.

The AM module is tested by looping the information on a time interval of each control channel. CH Ref legal event code: Each synchronizing clock circuit CBT distributes all timing signals to the group of units, through a common link LC duplicated, having two multiplex links.

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Preventive test paths driven by the logic machine connection network management MGX uses the MGT terminal management cousr machines for orders loopback and internal closures AM and terminal units UT couplers.

For example, there are 1 to 32 logical machines telephone call processing each managing a number of subscribers and circuits to other exchanges. These principles are applied to all types of terminal units: The apache autocoommutateur server is listed as “httpd” and the Linux kernel is listed as “linux”. 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.

The invention also relates to a protection device in which the software is organized into reconfigurable logic machines managed by the third level management means, characterized in that the fault signaling functions are centralized in a logical maintenance machine MLM that receives messages from the second level management means, and makes editing messages signaling. Of “watchdogs” control the occupancy times of the main paths autcommutateur information and release them in case of overflow.

For faults in the security block, the TGA task uses the data provided by the manager. 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. Finally for converters and air conditioners, signal contacts of these devices are cyclically observed by a special coupler ACC that dialogue with the TGA task.