454-0319/01 – VoIP (VoIP)
| Gurantor department | Department of Telecommunications | Credits | 4 |
| Subject guarantor | prof. Ing. Miroslav Vozňák, Ph.D. | Subject version guarantor | prof. Ing. Miroslav Vozňák, Ph.D. |
| Study level | undergraduate or graduate | Requirement | Choice-compulsory |
| Year | 2 | Semester | winter |
| | Study language | Czech |
| Year of introduction | 2003/2004 | Year of cancellation | 2009/2010 |
| Intended for the faculties | FEI | Intended for study types | Follow-up Master |
Subject aims expressed by acquired skills and competences
Understand the technology VoIP.
Learning outcomes are set so that the students are able to identify tasks in the field of VoIP.
Teaching methods
Lectures
Tutorials
Experimental work in labs
Summary
This course is directed towards the students of study program Information and communication technology. The aim is to acquaint students with technologies and standards of voice transmission in IP network with communication protocols H.323, SIP, MGCP and with elements enabling an implementation of voice services in IP network. A significant part is focused on area of Quality of Service. Laboratory works are oriented on protocol analyzing and students can choose semestral project from three themes based on open source VoIP solution as Asterisk, GnuGK or OpenSER. Communication standards are been already formed with pursuit to network design with integrated service which are able to transfer a data, voice or video. The next generation networks are using in considerable amount these techniques which are called as Voice over IP and VoIP is the significant direction in next evolution of communications.
Compulsory literature:
Recommended literature:
Additional study materials
Way of continuous check of knowledge in the course of semester
Conditions for credit:
Student can obtain max. 30 points, during the semester he obtains points for lab works max. 15 p. and for semestral project max 15 p., there is required to get minimally 15 p.
E-learning
Other requirements
Prerequisities
Subject has no prerequisities.
Co-requisities
Subject has no co-requisities.
Subject syllabus:
Lectures:
IP network fundamentals,protocol model TCP/IP, addressing in IP network, Real Time Protocol.
Encoding and decoding in various speech codecs, RTP bandwith calculation.
H.323 standard, protocol model, basic elements - GK, TE, GW, MCU.
H.225.0 RAS, Q.931 and H.245 signalling, type of messages, connection model GRC and DRC.
H.323 versions and their differents, Fast Connect method, H.245 tunelling, T.38 fax protocol.
Gateway for interconnection with PSTN, comparision of interfaces and possibilities FXS, FXO, EM, ISDN PRI and BRI.
Open solution H.323, network design and configuration GnuGK.
SIP/SDP protocol, description of elements - User Agent, Registrar, Redirect and Proxy server.
SIP requests and responses, message description, RFC 3261.
SIP Express Router.
Asterisk, SW PBX, protocol translation IAX2, SIP and H.323.
Quality of IP telephony - MOS, PESQ, E-model and R-factor, packet loss, delay and jitter.
QoS - Intserv, Diffserv, fragmentation, congestion control and queuing.
Communication protocol MGCP and Megaco/H.248.
Exercises:
Orientation in lab.
Configuration of SW and HW IP phones.
Traffic's monitoring in network, packet sniffers.
Laboratories:
Theme no.1., Basic analyzing of H.323 connection.
Theme no.2., H.245 procedures.
Theme no.3, RAS and basic Call Q.931 analyzing
Cisco VoGW, configuration.
Project GnuGK, introduction to configuration.
Project SER, introduction to configuration.
Project Asterisk, introduction to configuration.
Theme no.4, Analyzing SIP methods and responses, call flow.
Theme no.5, Parsing SIP headers.
Theme no.6, Analyzing of voice quality.
Projects:
Semestral project, design of VoIP network with one of the open source solutions as GnuGK or SER or Asterisk.
Conditions for subject completion
Occurrence in study plans
Occurrence in special blocks
Assessment of instruction