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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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Analyzing IP Telephony over H.323
Karpíšek, Filip ; Ryšavý, Ondřej (referee) ; Matoušek, Petr (advisor)
This thesis describes protocols from H.323 standard. Tools used for analyzing VoIP calls over H.323 are described. The main object is to describe a design and implementation of a tool for analyzing IP telephony over H.323. The tool seeks and decodes signaling messages. These messages are analyzed for information about call itself (time of beginning and end of a call, call numbers of participants, etc.) and for information necessary for capturing multimedia data. When captured, multimedia data are exported for proper post-processing. Call information are exported as XML structures.
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SIP/H.323 gateway with Asterisk PBX
Smékal, Lukáš ; Herman, Ivo (referee) ; Kovář, Petr (advisor)
This Bachelor’s thesis is engaged in problems of the internet telephony and its usage in today´s world, which offers many techniques how communicate among people. The internet telephony gives telephoning other format and shows new possibilities of IP protocol´s usage. The thesis is focused on the most used protocol corveying functions of VoIP technology, it is the standard H.323 and also the SIP protokol, which even if provides the same functions as H.323 is based on the different principle and because of its easy structure, it prepares good conditions for rise of new applications and services in internet telephony. In this thesis the Open Source private branch exchange Asterisk is also discussed. Asterisk, not only thanks to the usage of Voice over IP provides against the standard analogue private branch exchange many advantages and thanks to its modularity and expansibility also offers much more possibilities of configuration. The Session Initiation Protocol (SIP) is the basic protocol, with which Asterisk works. The standard H.323 is not implemented in the basic installation of Asterisk, therefore it is necessary to do its suitable installation and congiruation, in order to expand exchange´s functions for work with this standard and also to be able to realize translation between the protocol SIP and the standard H.323. The results, which I accomplished, are presented in the chapters „Dosažené výsledky“ and in the conclusion of the bachelor’s thesis.
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Security of real time multimedia data transmission
Otoupalík, Petr ; Koutný, Martin (referee) ; Hošek, Jiří (advisor)
This thesis deals with technology and security of real-time multimedia data transmission. The possibilities of the security of a multimedia data transfer and the mechanisms defined for the security of the signaling protocols SIP and H.323 are described with the view of security. The possible attacks on the real-time transfers are also mentioned. The basic requirements on the safe and reliable data transfer are specified. The main part of this thesis is focused on the security analysis of the data transmission of the selected communication clients, which use different security methods. The last part of the thesis deals with realization of simple attacks on multimedia data transmission and also on the SIP protocol.
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Videoconference potentials in PBX Asterisk
Vlk, Bronislav ; Číka, Petr (referee) ; Krajsa, Ondřej (advisor)
This thesis deals with the possibilities of video conferencing in Asterisk PBX and their use in practice. They also described the contingencies and how its configuration. Particular attention is paid to the protocols SIP, IAX and H.323, which are described in one of the chapters. The thesis was created by the Asterisk PBX, which demonstrates cooperation with videoconferencing clients. The thesis describes the configuration files so that the central set. Conclusion the work assesses the use of codecs for different clients.
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Open source PBX YATE
Kovář, Jan ; Daněček, Vít (referee) ; Šilhavý, Pavel (advisor)
The work discusses about the PBX Yate, describes its configuration from the initial installation, through the basic setup and description of the way through the logs of user registration, the syntax for defining the calling plan, including examples, and additional services, including demonstration of practical verification of the functionality in the computer lab. Are also created two samples job for more familiar with the principles of operation and the Yate PBX settings.
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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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Videoconference at school
Karadžos, Petr ; Lustig, František (advisor) ; Stejskal, Martin (referee)
TITLE: Videoconference at school AUTHOR: Petr Karadžos DEPARTMENT: Department of technical and informatics education SUPERVISOR: doc. RNDr. František Lustig, CSc. ABSTRACT: The theoretical goal is based on overview of videoconferencing solutions regarding to usage in educational process and overview of application videoconferencing solutions. Moreover, theory part is also focused on how videoconferences are working according to technical background. The descriptions of signaling process between two or more ending points and how are multimedia data transmitted during videoconference calls. The topic of practical part is to analyze how videoconferences can be used as technical educational tools in learning environment based on videoconferencing pilot project. KEYWORDS: Videoconferencing, H.323, SIP, webinar, multimedia, ICT, Multicast, Moodle, GoToWebinar
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Analyzing IP Telephony over H.323
Karpíšek, Filip ; Ryšavý, Ondřej (referee) ; Matoušek, Petr (advisor)
This thesis describes protocols from H.323 standard. Tools used for analyzing VoIP calls over H.323 are described. The main object is to describe a design and implementation of a tool for analyzing IP telephony over H.323. The tool seeks and decodes signaling messages. These messages are analyzed for information about call itself (time of beginning and end of a call, call numbers of participants, etc.) and for information necessary for capturing multimedia data. When captured, multimedia data are exported for proper post-processing. Call information are exported as XML structures.
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Videoconference at school
Karadžos, Petr ; Lustig, František (advisor) ; Stejskal, Martin (referee)
TITLE: Videoconference at school AUTHOR: Petr Karadžos DEPARTMENT: Department of technical and informatics education SUPERVISOR: doc. RNDr. František Lustig, CSc. ABSTRACT: The theoretical goal is based on overview of videoconferencing solutions regarding to usage in educational process and overview of application videoconferencing solutions. Moreover, theory part is also focused on how videoconferences are working according to technical background. The descriptions of signaling process between two or more ending points and how are multimedia data transmitted during videoconference calls. The topic of practical part is to analyze how videoconferences can be used as technical educational tools in learning environment based on videoconferencing pilot project. KEYWORDS: Videoconferencing, H.323, SIP, webinar, multimedia, ICT, Multicast, Moodle, GoToWebinar
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