Introduction to Voice over IP


OVERVIEW

Voice over IP (VoIP) has significantly gained momentum on the European telecom market over the last years. While it offers an attractive business opportunity for operators in the move to triple play and subscriber churn reduction, there are a number of decisions to be made as various technologies and architectures exist.
The course gives a high-level overview of packet switched voice technologies. Starting with the principles of the circuit switched PSTN network, the course leads you into the world of packet switched voice services. It covers some available standards and protocols such as H.323, SIP, EuroPacketCable and EuroPacketCable Multimedia and how they interface with different standards and networks. Important requirements such as Quality of Service, with the focus on the access network are discussed. Finally, it touches on some other voice transport mechanisms.

WHAT CAN YOU EXPECT?

  • Understand the principles of circuit switching and packet switching and the interfacing between the two.
  • Understand the necessity and mechanisms of Quality of Service in packet switched networks.
  • Have an overview of the various protocols and standards, their merits and disadvantages.

CONTENT

PART 1: PSTN
General architecture, circuit switching, TDM, SS7/ CSS#7.

PART 2: PACKET SWITCHED NETWORKS
General architecture, packet switching, voice packets and QoS.

PART 3: VOIP STANDARDS
H. 323, SIP, EuroPacketCable.

PART 4: INTERWORKING
SIP and SS7, EuroPacketCable and SS7, SIGTRAN, session border controllers.

PART 5: CODECS
Overview and comparison of various codecs.

PART 6: MEDIA STREAMS
PSTN versus IP, RTP and RTCP, calculation of transmission rates.

PART 7: QUALITY OF SERVICE
QoS in the access network, SIP, EuroPacketCable, EuroPacketCable Multimedia; QoS in the backbone; MOS, PSQM, PESQ.

PART 8: VOIP ISSUES
Silence suppression, ISDN support, assessing impact of voice on data networks, billing.

PART 9: OTHER VOICE TRANSPORTS
VoDSL: CVoDSL, VoATM over DSL; VoIP over DSL, VoWLAN; standards situation.

PREREQUISITES

Basic understanding of (inter)networking. Basic knowledge of access technologies.

 

contact person

An Janssens
training@excentis.com

fee

1 and 2 : 1000 €
3 to 6 : 900 €
7 to 15 : 800 €

duration

2 days

register now

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