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Proprietary VoIP protocols of PBX manufacturers
Bělík, David ; Daněček, Vít (referee) ; Šilhavý, Pavel (advisor)
This thesis focuses on the analysis of proprietary Voice over IP protocols. The first part describes the principles and VoIP technology types. The next section describes proprietary protocols Panasonic IP-PT from Panasonic Corporation and Siemens CorNet-IP from Siemens Corporation. Protocols which are being used in these systems are listed here. Further there is being described the process of registration of terminals to central province. Subsequently calling process and particular terminal functions including packet analysis are being decoded in detail. In conclusion H.323 and MGCP protocols are being compared.
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Possibilities of connecting the Asterisk softswitch to the 4th generation PBX
Halamík, Zdeněk ; Krajsa, Ondřej (referee) ; Šilhavý, Pavel (advisor)
This master’s thesis dissertate the possibilities of the linkage between Asterisk softswitch and the 4th generation private branch exchange. This should create a new generation’s network, so-called NGN, by the convergence of existing telecommunication networks with an IP computer network. This master’s thesis is divided into several chapters. In introduction is described the evolution of the private branch exchanges as well as the principles of the voice digitizing, codecs and signaling commonly used in both TDM and VoIP networks. The main aim of this project is the configuration of Asterisk software exchange for connection with PBX Alcatel 4400 as well as public phone network PSTN. Another goal of this master’s thesis was the configuration of Alcatel PBX and diagnostics of CCS and CAS signaling on E1 interface. In conclusion there are summarized advantages of NGN networks and their utilization in the future.
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Multimedial transmisions in Ethernet
KALINA, Stanislav
The aim of this BC thesis is a comprehensive view of the problem of multimedia data transmission in ethernet. The thesis deals mostly with the description of the transport and signal protocols, explains their usage, describes their main functions and presents examples. Further substantial part of the thesis has been devoted to multicasting and service regulations in network by means of QoS.
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Proprietary VoIP protocols of PBX manufacturers
Bělík, David ; Daněček, Vít (referee) ; Šilhavý, Pavel (advisor)
This thesis focuses on the analysis of proprietary Voice over IP protocols. The first part describes the principles and VoIP technology types. The next section describes proprietary protocols Panasonic IP-PT from Panasonic Corporation and Siemens CorNet-IP from Siemens Corporation. Protocols which are being used in these systems are listed here. Further there is being described the process of registration of terminals to central province. Subsequently calling process and particular terminal functions including packet analysis are being decoded in detail. In conclusion H.323 and MGCP protocols are being compared.
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Possibilities of connecting the Asterisk softswitch to the 4th generation PBX
Halamík, Zdeněk ; Krajsa, Ondřej (referee) ; Šilhavý, Pavel (advisor)
This master’s thesis dissertate the possibilities of the linkage between Asterisk softswitch and the 4th generation private branch exchange. This should create a new generation’s network, so-called NGN, by the convergence of existing telecommunication networks with an IP computer network. This master’s thesis is divided into several chapters. In introduction is described the evolution of the private branch exchanges as well as the principles of the voice digitizing, codecs and signaling commonly used in both TDM and VoIP networks. The main aim of this project is the configuration of Asterisk software exchange for connection with PBX Alcatel 4400 as well as public phone network PSTN. Another goal of this master’s thesis was the configuration of Alcatel PBX and diagnostics of CCS and CAS signaling on E1 interface. In conclusion there are summarized advantages of NGN networks and their utilization in the future.
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Security of Enterprise VoIP Telephony Networks
Šolc, Jiří ; Pavlíček, Luboš (advisor)
This thesis focuses on enterprise VoIP telephony network security. Introduces brief comparison of old analog and digital voice networks and IP telephone networks with special focus on VoIP system security. The goal of the thesis is to identify the risks of implementation and operation of VoIP technologies in enterprise environment and so thesis brings some conclusion how to minimalize or avoid these risks. First two chapters briefly introduce the development of telephony technologies with differentiation of enterprise telephone network from public telephone networks. Further it describes individual technologies, digitalization of voice, processing the signal and VoIP protocols and components. Third chapter focuses on infrastructure of telephony networks with special interest for architecture of IP telephony and ways of establishing call processing. It describes data flows for further security risk analysis, which this technology came with. Fifth chapter is about enterprise security standards in common and is trying to describe information security management system (ISMS) adopting VoIP technology. Individual security threats and risks are described in sixth chapter, along with known methods how to avoid them. Final parts of thesis concludes of two real situation studies of threats and risks of VoIP technologies implemented in environment of small commercial enterprise and medium size enterprise, in this example represented by University of economics. These chapters conclude theoretical problems shown on practical examples.
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