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Analyse einer Voice Over IP-Lösung und Entwurf von Testszenarien

Analyse einer Voice Over IP-Lösung und Entwurf von Testszenarien

          
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About the Book

Inhaltsangabe: Einleitung: Voice over IP (VoIP) ermöglicht eine dem klassischen Telefonanruf vergleichbare Verbindung über eine paketorientierte Infrastruktur, über die Sprach- aber auch Multimediadaten in Echtzeit zwischen zwei oder mehr Computern bzw. Endpunkten im ISDN- oder klassischen Telefonnetz versandt werden. Ein Gateway für IP Telefonie stellt als Schnittstelle zwischen IP-Netz und Telefonnetz die Interoperabilität zwischen den verschiedenen Netzen zur Verfügung, konvertiert also Signalisierungs- und Kontrollinformationen und schließlich die Datenströme selbst. Das Gateway besteht aus einer die Sprachübertragung unterstützenden ISDN-Karte und der Gatewaysoftware. Typische Anwendungen und Szenarien bauen derzeit auf verschiedenen Protokollfamilen auf. Die zwei hauptsächlichen Ansätze sind das ältere, verbreitetere H.323-Protokoll der ITU-T und das Session Initiation Protocol (SIP). Die Problemstellung für Voice over IP umfasst damit Anwendungen, die sowohl Audio- und Videodatenströme als auch die Übertragung von Text oder Signalisierungs- und Kontrollinformationen beinhalten. Komplexe Protokolle, dynamisches Protokollverhalten, hohe Datenraten oder Beschränkungen hinsichtlich der Dienstgüte (Quality of Service) und die Verbindung verschiedenartiger Netztypen gehören zum Aufgabenfeld des Gateways und beinhalten damit auch viele Fehlerquellen. Diese Arbeit beschreibt als Schwerpunkt die Entwicklung und Anwendung von Testszenarien für ein solches Gateway der Firma Eicon Networks, ist aber nicht produktspezifisch. Ausführlich vorangestellt werden Grundlagen und Probleme der Technik von Voice over IP basierend auf dem Standard H.323 der ITU-T. Grundlegende Funktionstests und eigene Testfälle werden vorgestellt, aus den gewonnenen Erfahrungen heraus wird letztlich eine Ergänzung für bereits bei Eicon Networks bestehende VoIP-Testtools entworfen und implementiert. Inhaltsverzeichnis: Inhaltsverzeichnis: 1.Einleitung1 2.Voice over IP mit dem Standard H.3232


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Product Details
  • ISBN-13: 9783838647425
  • Publisher: Diplom.de
  • Binding: Paperback
  • Language: German
  • Returnable: N
  • Spine Width: 5 mm
  • Width: 148 mm
  • ISBN-10: 3838647424
  • Publisher Date: 22 Nov 2001
  • Height: 210 mm
  • No of Pages: 88
  • Series Title: German
  • Weight: 127 gr


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Analyse einer Voice Over IP-Lösung und Entwurf von Testszenarien
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