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LESpy - PCM Link Analyzer
KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT. (CCSlab)
2002 (English)Independent thesis Advanced level (degree of Master (Two Years)), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

This report will discuss the design of a test tool, a PCM link analyzer, LESpy. The development of LESpy is based upon reuse of C++ source code from previous test equipment from INEO, LESim. The purpose of LESpy is a tool for analyzing two telephony interfaces in Ericsson’s ”Radio in the Local Loop” system RAS 1000. Monitoring the Channel Associated Signaling (CAS) interface was the primary goal. As second goal was to find a solution to analyze the ISDN interface.

The report presents some background information about telephony, computer telephony, the RAS 1000 system, and the development and target environment (IBM’s operating system OS/2). It also describes building blocks and functionality, i.e. the nodes, components, classes, and use cases of LESpy through UML diagrams.

The result of the project is a test tool where most of the requirements were fulfilled through inheritance of new classes and new functionality by polymorphism. As required supervision and address signaling could be monitored and saved to a file.

Abstract [sv]

Denna rapport tar upp designen av ett test instrument, en PCM länks analysator LESpy. Utvecklingen av LESPy baseras på återanvändning av objektorienterad källkod i C++ från en tidigare testutrustning från INEO, LESim. Syftet med LESpy var att analysera två telefonigränssnitt hos Ericsons ”Radio in the Local Loop” (RLL) system RAS 1000. Viktigast var att få fram en lösning för att monitorera gränssnittet med kanal associerad signalering (CAS), ISDN var av sekundär betydelse.

Rapporten tillhandahåller en viss bakgrunds information rörande telefoni, datorstödd telefoni, RAS 1000 systemet samt utvecklings och målmiljön för LESpy (IBMs operativsystem OS/2). Den tar upp byggblocken och funktionaliteten d v s noderna, komponenterna, klasserna samt användningsfallen hos LESpy via UML diagram.

Resultatet av projektet är ett testverktyg där de flesta kraven blev uppfyllda genom att ärva nya klasser och erbjuda ny funktionalitet genom polymorfism. Krav som övervakning och addressignalering kunde bli monitorerad och sparad till fil.

Place, publisher, year, edition, pages
2002. , 77 p.
National Category
Communication Systems
URN: urn:nbn:se:kth:diva-93203OAI: diva2:515374
Educational program
Bachelor of Science in Engineering
2002-10-18, Seminar room "Castor", Forum, Isafjordsgatan 39, Kista, 11:00 (Swedish)
Available from: 2012-04-18 Created: 2012-04-12 Last updated: 2013-09-09Bibliographically approved

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