VoIP and IP Telephony training
course contents
Introduction
What is VoIP, brief review of IP, brief review of telephones, voice and signalling.
VoIP issues
Bandwidth, Delay, Jitter. Voice coding and compression, packetising voice, comparison of
techniques, MOS.IP performance and QoS. The need for QoS, prioritising voice.
Architectures
Hard phones, soft phones, video phones, desktop, backbone, gateway, integrating analog
phones and PCs, carriers, Softswitches.
VoIP protocol stack
RTP, RTCP. H.323 vs SIP, other signalling protocols.
H.323
Architecture, Call setup, Gatekeepers.
SIP
Comparison with H.323, SIP proxy, proxy servers, redirect servers, location servers.
MGCP and MegaCo
Carrier networks, PSTN breakout, SS7 gateways, MGCP, Megaco.
IP PBXs
Integrating IP into "normal" PBXs, IP PBXs, Asterisk. UM, other telephony applications.
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