What is VoIP

What is VoIP, brief review of IP, brief review of telephones and voice.

VoIP Issues and Architectures

Bandwidth, Delay, Jitter, signalling. PCM, ADPCM, Waveform and voice coding, Packetising voice, comparison of techniques, MOS. Desktop, backbone, gateway, integrating phones and PCs, carriers, Softswitches.

IP Performance and QoS

MPLS, layer 2 and 3 switching. IP TOS field, queuing strategies; FIFO, WFQ, custom, priority, RED. Differentiated services, diffserv.

VoIP Protocol Stack

RTP, RTCP, mixers and translators, RSVP. IPv6.

ITU Recommendation H.232

Architecture, Call setup, Gatekeepers, gateway discovery, H.323 registration with a gatekeeper.

IETF – Session Initiation Protocol

Comparison with H.323, SIP proxy, proxy server, redirect server.

MGCP and MegaCo

Carrier networks, PSTN breakout, SS7, SS7 gateways, MGCP, Megaco

Multimedia Over IP

Video over IP, Multicasting.

Integrating Voice and Data Without IP

Data over voice, ISDN, voice over Frame Relay, voice over ATM