One of the most parts of VOIP management is fault management and, in having a good fault management, finding good mechanisms to detect faults in the network have to be considered. The main focus of this project is to implement different types of fast fault recovery protocols in networks, especially networks that carry IP telephony. Having a complete understanding of some common link failure detection and fault recovery protocols, such as spanning tree protocol (STP), rapid spanning tree protocol (RSTP) and per-VLAN spanning tree protocol (PVSTP), and also having a complete understanding of three other common techniques for fault detection and fault recovery, such as hot standby routing protocol (HSRP), virtual router redundancy protocol (VRRP) and gateway load balancing protocol (GLBP) will be regarded in the project. We are going to test some fault recovery protocols which can be used in IP telephony networks and choose the best. We intend to focus on this issue in LAN environment in theoretical descriptions and practical implementations. The final outcome of the thesis is implementation in the Halmstad University’s lab environment to obtain the final result. For doing our thesis, we are going to use some technical tools as hardware tools (Cisco L3 and L2 switches, Routers, IP Phones) and tools which are used for network performance monitoring, like as CommVeiw.

Informationen des Universitätsrechenzentrums: - Die Projekte Campusnetz II und IP-Telefonie (VoIP) - PROWeb - Ein neuer Dienst für Projekt-WWW-Server - Unterstützte Linux-Distributionen - WUSCH - Windows-Update-Service an der TU Chemnitz - Informationen des URZ zur "Rahmenvereinbarung zum Einkauf von Standard-PC-Technik" -Umstellung des Lokalsystems der UB auf LIBERO 5 - Elektronisches Publizieren an der TU Chemnitz - 10 Jahre MONARCH - Kurzinformationen - Software-News

Informationen des Universitätsrechenzentrums mit Jahresrückblick 2007 zu den aktuellen Projekten und Diensten des URZ

Informationen des Universitätsrechenzentrums mit Jahresrückblick 2009 zu den aktuellen Projekten und Diensten des URZ

The master’s thesis focuses on the virtual local computer network for laboratory usage. It aims to propose and realize proper network connection in order to monitor expected data flow. Thanks to the network analysers (software ClearSight and hardware NetTool Series II) it plans to pursue in detail the used transmission protocols of TCP/IP layers. The most decisive feature happens to be the right choice of appropriate network components and their precise configuration. Consequently, the thesis formulates a proposal of a laboratory task for the needs of students, which is also closely related to the actual problems. The assignment of the task will serve the teachers as a test pattern for measurement. The results elaborated in the form of the model protocol should enable later comparison of the recorded data. Another part of the diploma thesis is the working-out of well arranged manuals for the network analysers involved.

Informationen des Universitätsrechenzentrums:CABS - Chemnitzer AFS Backup Suite Ankündigung: Administrationsdienst WindowsXP Reorganisation der URZ-Web-Seiten Web Accessibility LIBERO-Einführung in der UB Einsatz von Openoffice im URZ Pro/ENGINEER Wildfire unter Linux Voice over IP - Testszenarien Kurzinformationen

Informationen des Universitätsrechenzentrums mit Jahresrückblick 2007 zu den aktuellen Projekten und Diensten des URZ:Jahresrückblick 2007 Eine Groupwarelösung für die TU Umstellung der zentralen WWW-Server Softwareausstattung der Ausbildungspools Software-News Kurzinformationen

Informationen des Universitätsrechenzentrums mit Jahresrückblick 2009 zu den aktuellen Projekten und Diensten des URZ:Jahresrückblick 2009 Neue Technologie im Campus-Backbone - Virtual Switching System (VSS) Softwareausstattung der Ausbildungspools Kurzinformationen Software-News

This mini-dissertation reviews present literature to define ICT and SMEs and determine the current situation in South Africa with regard to the use of ICT by SMEs, including possible benefits to SMEs as well as stumbling blocks to adopting ICT. The research consists of collecting data from ten SMEs in Gauteng in South Africa using questionnaires and interviews, to determine how SMEs can use ICT to become more competitive. The mini-dissertation will have a number of chapters: the first chapter will give an overview of the subject. The second chapter will explain the research motivation and methodology while the third chapter will be the literature review, which will explore the topic of ICT and SMEs in depth, with a focus on South Africa. Chapter four will deal with data collection and analysis; the main source of data will be interviews based on structured questions. The fifth chapter will be the discussion and recommendations based on the results of the analysis and the literature review. Chapter Six will be the conclusion. / Dissertation (MIT)--University of Pretoria, 2008. / Informatics / unrestricted

This thesis aims to improve a satellite communication network which carries both data streams and Voice over IP (VoIP) communication sessions with resource reservation. The resource reservations are made using the standard protocols for Traffic Engineering: MPLS-TE and RSVP-TE. The goal of this thesis project is to optimize the number of concurrent VoIP calls that can be made, in order to use the available bandwidth while maintaining a guaranteed Quality of Service (QoS) level, which is not possible in the existing system. This thesis proposes and evaluates a solution to this optimization problem in the specific context of a satellite modem system that was developed by Thales Communications. This optimization improves the system's ability to carry VoIP communications through better use of the available transmission resources. A solution to this problem would also increase the  exibility in bandwidth allocation within the modem system, and could provide a framework for future development. The proposed solution allows all of the reservable bandwidth to be used.  The amount of reservable bandwidth must be at least a little lower than the channel's available bandwidth in order to avoid congestion. Some areas of future work are proposed. / Detta projekt har försökt förbättra ett datornätverk bestående av satelliter som används till både data och Voice over IP (VoIP) kommunikation. VoIP använder sig av resursreservation som bestäms av standardprotokollen för Traffic Engineering, MPLS-TE och RSVP-TE.  Målet är att optimera antalet samtidiga VoIP samtal så att det mesta av den befintliga bandbredden kan utnyttjas samtidigt som Quality of Service (QoS) kan garanteras. Detta är omöjligt i det befintliga systemet. Projektet föreslår en lösning för problemet med modemet som utvecklas av Thales Communications och utvärderar därefter lösningen. Dessa optimeringar förbättrar systemets förmåga att driva VoIP kommunikationer genom att bättre använda de befintliga resurserna. En lösning för det här problemet skulle höja systemets flexibilitet och kunna användas som underlag för kommande utvecklingar. Tack vare lösningen kan hela utsedda bandbredden reserveras. Antalet bandbredd som kan reserveras måsta vara minst lite lågre än total befintling bandbredd för att undvika överbelastning. även några möjliga ideer för vidare undersökning föreslås. / Ce projet a pour but d'améliorer un réseau de communication par satellite utilisé pour transporter des flux de données ainsi que des sessions de communication Voix sur IP (VoIP) avec réservation de ressources. Les réservations sont prises en charge par les protocoles standard de Traffic Engineering que sont MPLS-TE et RSVP-TE. L'objectif de ce projet est d'optimiser le nombre d'appels VoIP pouvant être passés en parallèle afin d'utiliser autant de bande passante que possible tout en offrant un niveau de Qualité de Service (QoS) garanti, chose impossible dans le système actuel. Ce rapport propose et évalue une solution à ce problème d'optimisation dans le contexte spécifique du modem satellite développé par Thales Communications. Ces optimisations amélioreraient la capacité du système à transporter des communications VoIP grâce à une meilleure utilisation des ressources disponibles pour la transmission. Une solution à ce problème rendrait aussi l'allocation de ressources plus flexible au sein du système, et pourrait fournir une base à de futurs développements. La solution proposée permet l'utilisation de toute la bande passante réservable. La quantité réservable doit être un peu inférieure à la bande passante totale disponible afin d'éviter la congestion. Les résultats de ces évaluations sont exposés. Enfin, ce rapport propose de futurs développements possibles.