| H.323 training
course contents VoIP review
Brief review of VoIP, IP, telephones and voice. RTP, RTCP,
mixers and translators.
What is H.323?
The framework, Why H.323, history, H.323 standards and the
ITU, H.323 versions 1,2,3,4, and 5, Annexes and Appendices,
capabilities, services, How H.323 works, a basic call.
H.323 protocol stack
The overall framework, Audio codecs (H.7xx), Video codecs
(H.26x), T.120 data conferencing.
H.323 Architecture
Endpoints: Terminals, MCUs, gateways. Gatekeepers, border
and peer elements, design issues, signalling with and without
gatekeepers.
H.225
Packet format, ASN.1, Information elements, Call setup, Call
control.
Gatekeepers
Gatekeeper features, admissions, address translation, bandwidth
management, call routing, zones, administrative domains,
gatekeeper discovery, call establishment, fast connect.
RAS packet formats, RAS signalling. Alternate gatekeepers.
H.245
Purpose, call control channel, relationship with H.225, message
format, tunnelling.
H.323 Supplementary services
Conferencing: point to point, multipoint, hybrid, broadcast,
H.332. H.450.x. Call transfer, diversion, hold and waiting.
Remote device control (H.282, H.283). Capability exchange,
Video.
Security
H.235. Authentication, privacy, transport layer level security.
Interoperability
Gateways, Inter working with PSTN, SIP and H323. H.246.
Annexes and Appendices
An overview
| 
