Abstract: The modern telecommunication network at present days converge old plain technologies with new technologies. The FlexBRI hybrid voice card technology converge analog and ISDN technology. This article deals with PBX Asterisk with the FlexBRI hybrid voice card technology. It also includes a description of the experimental workspace. The experimental results are presented at the end of this article.
Abstract: The article deals with the Fault-tolerant control system which is based on majority voting with the Kalman filter. The reader is made familiar with the Fault tolerant systems and requirements on them at the beginning. The voters, the majority voting principle and the Kalman filter equations are subsequently described. The reader is made familiar with the Fault-tolerant control system which is based on majority voting with the Kalman filter after then. That Fault-tolerant control system is described in detail, including the experimental simulation results. The conclusion of the article contains a detailed description of the Fault-tolerant control system which is based on majority voting with the Kalman filter and it assess experimental results.
Abstract: The article deals the work on the software private branch exchanges Asterisk with the B700 FlexBRI hybrid voice card. It also includes possibilities of private branch exchanges and it presents latest software private branch exchanges which are implemented on the most modern hardware units. It also includes a description of the experimental laboratory workspace which is equipmented with software private branch exchanges.
Abstract: The article deals with fault tolerant connection between PBXs. At the beginning, the reader is made familiar with the problems of most common PBX and with SIP communication. Subsequently the majority voting concept is described. Then the reader is made with familiar with the enhancing of the majority voting concept with work priorities. This type of concept is described in detail, including examples. The conclusion of the article contains a detailed description of the new fault-tolerant concept and its possible subsequent implementation on PBXs.
Abstract: The article deals with comparison of using the most suitable transmission media for VoIP (Voice over Internet Protocol) service in package Triple-Play at a distance of 200 m. It describes the service and its requirements on an access network.If necessary to connect two points at these distances, comparison of using FSO (Free-Space-Optics) data link and possibility to use optic fiber with length 300 m are given. Group of parameters defined in RFC 2544, which will lead to comparison of the suitability of using transmission media, is measured for both types of connection with AXS-200/850. Influence of increasing atmospheric attenuation on BER (Bit-Error-Rate) and throughput is described as well. Based on long-term measurement, values of BER and availability of the data link are derived.
Abstract: The article deals with a comprehensive proposal for fault-tolerant systems safe. The first introduces readers to the concepts of safety and fault-tolerant system. Subsequently, it analyzes the current and earlier standards dealing with safety issues. Then the reader is familiar with the model and the concept of layers of safe protection layer. Individual safe protection layers are explained in detail. It also states in the context of fault-safe systems relevant to the concept of the safety integrity level and probability of failure.
Abstract: This article deals with innovation teaching PBX, including the latest software PBX. Contains a methodological proposal for learning including the possibility of feedback from the students themselves. It includes a description of the laboratory work for teaching not only the software PBX. Additionally, this text acquaints readers with the detailed work on the Asterisk PBX software.
Abstract: This article deals with buck-boost DC-DC voltage converter realized by integrated circuit MC33063A. Theory and application of the switching regulator control circuits MC33063A as voltage invertor is presented. Mentioned buck-boost DC-DC voltage con-verter circuit is discussed. Simulations in PSpice results are presented.
Abstract: This article describes a simple two-part power management of smart LI-ION battery pack.The first part of the introduced system includes dual bidirectional uses voltagelevel translator, which is used for communication with smart LI-ION battery pack integrated circuits. The second part of the system deals with the measurement of Battery pack safety signal named as Tusing analog-digital converter and I2C interface, where all data from battery pack integrated circuit and actual signal T voltage value are delivered to external master control unit by I2C bus. Finally, an application of the introduced simple power management bus is presented.
Abstract: A uninterruptible power supply with management sytem utilizing I2C bus for general purpose. The Managment support information about: Line adapter/ battery pack switch, battery-pack charging condition and actuall temperature battery-pack. Output voltages are 5V/ 2 A , 12V/ 0.5 A and -12V/ 0.1 A.
Project: 1ET110540521 - Research into a new generation of infusion pumps with central management system (2005-2008, AV0/1E)
Abstract: The object of my master’s thesis is the design a Medical device uninterruptible power supply with managment system utilizing I2C bus.
Norm EN 61000-3-2 define electric parameters for medical device power supply. In case of power supply for medial equipment is expressive accent on increased electric strength. This power supply have usually primary and secondary power circuit. Primary power circuit form line accumulator, which supplies needed output to the load and recharge reserve battery. Secondary is formed battery-pack, which serve as back-up power supply at drop-out prime circle. They have a minimum weight, small proportions, large overall effectivity also charging battery-pack and monitoring battery-pack charging condition.
Result whole those master’s thesis is design Medical device uninterruptible power supply with managment system utilizing I2C bus and realization board layout. Resulting characteristics designed supply unit are: Output voltages are 5V/ 3 A , 12V/ 1,5 A and -12V/ 0,1 A. Managment support information about: Line adapter/ battery pack switch, battery-pack charging condition and actuall tempera-ture battery-pack.
