Struktur Rekomendasi H.323 dari ITU-T untuk video conference pada basis LAN

Video 
Equipment

Video codecs
H.261,H.263

Audio codecs
G.722,G.723,G.728

Audio
Equipment

Receive Path Delay

User data applications
T.120,etc

Layer H.225.0

NIC
(LAN Interface)

System Controll User Interface

Systemcontroll

H.245 controll

Rass controll
H.225.0

Call controll H.225.0