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The primary means for fault detection will be described as pabxx example. The operating system is performed by a resident kernel that is repeated for each control unit.
A difficulty arises when attempting a defense system well suited to a distributed control system without losing any of the advantages of flexibility and modularity of it. Dialed number to function translator for telecommunications switching system control complex.
The software is distributed by the nature of the system.
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An example of unit of subscriber terminals is shown in Figure 2. Test states of a tape drive, provided by the coupler of the unwinder. 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.
These clock circuits and CBT comprise synchronization as shown Figure 4 a base circuit BT internal time, which develops SYT synchronization signals and the clock signals h1 to h4 necessary for terminal units UT, as well as circuits CS1 to CS4 synchronization multiplex links. Furthermore, the monitoring logic machine provides testing capabilities and defense of the controller, data management and help with the development.
Programme amovible de test de localisation. An example of such action by the logical machine RQM connection network management is given below, in the case of defect detection: 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.
Method and system for providing redundancy for signaling link modules in a telecommunication system. 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.
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The reset indicator is performed following repair validation tests. Small modular communications switching system with distributed programmable control. A preferred embodiment of the invention will be described as an example.
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 units in the group concerned, and an output latch B4.
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. 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 defense system is organized into three levels: Methods, systems and computer program products for connecting and monitoring network equipment in a telecommunications system.
We find the functions for a division into three levels: For faults in the security block, the TGA task uses the data provided by the manager. Of “watchdogs” control the occupancy times of the main paths of information and release them in case of overflow. Country of ref document: A control unit UC is shown schematically in Figure 5.
In this way we can not only compare two competing projects, but also track the progress of distributions as they adopt newer versions of software. The links that interconnect these bodies are: Ref legal event code: 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 flexibility.
Special Task alarm management and TGA an alarm panel.
Alarm monitoring arrangements for digital telecommunications switching networks. A two level control in which the second level is not integrated with the modules described in the article by Shimasaki entitled “A versatile digital switching system for central office NEAX 61” Proceedings of the symposium ISS 79 – 7 to 11 May Paris Volume 2, pages to These principles are applied to all types of terminal units: Les liaisons qui interconnectent ces organes sont les suivantes: For this purpose the implantation of logical machines is controlled by a logical machine for managing the control network, MLR, the control system being constituted by the control assembly, the links point to point RIT.
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. This allows a distributed defense associated with centralized maintenance. This architecture shown in Autocimmutateur 8 shows the redundant units for reconfiguration, and managers logical machines. It is particularly applicable in the industries of telecommunications and telematics.
The two disks are managed by separate microprocessors. In each microprocessor is located a maintenance task that performs internal testing ocurs indicates the logical machine MLR managing the state of the microprocessor. An effective defense requires capability for early detection of faults and quick system response, for example by switching on emergency organ, precise location means the offending organ, and means the effective action of the emergency autocommmutateur In the system according to the invention, facilities are divided into two sets: The initialization sequence of the latter charge: