Incazelo: H.323 iyinqubo yeprotocol yokuxhumana kwe-multimedia. I-H.323 yenzelwe ukusekela ukudluliswa kwesikhashana sangempela kwedatha yomsindo nevidiyo phezu kwamanethiwekhi wepakethe njenge-IP. Le nqubo ihilela izivumelwano eziningana ezihlukahlukene ezihlanganisa izinto ezithile ze- telephony ye-Inthanethi. I-International Telecommunication Union (ITU-T) igcina iH.323 kanye nalezi zindinganiso ezihlobene.
Izinhlelo eziningi zezwi le-IP (VoIP) zisebenzisa uH.323. I-H.323 isekela ukusethwa kwekholi, i-teardown nokuthumela / ukudlulisa. Izakhi zokwakhiwa kwesistimu esekelwe iH.323 yi-Terminals, Multipoint Control Units (MCUs), Gateways, i-Gatekeeper ozikhethela kanye ne-Border Elements. Imisebenzi ehlukene ye-H.323 isebenza nge- TCP noma i- UDP . Ngokubanzi, i-H.323 ihlangene ne- Session Initialization Protocol (SIP) entsha, enye indinganiso evezwe njalo etholakala kwizinhlelo zeVoIP .
Isici esiyinhloko se-H.323 yi- Quality of Service (QoS) . I-teknologi ye-QoS ivumela ukubeka phambili isikhathi sesikhathi kanye nezinkinga zokulawulwa kwezimoto ukuthi zifakwe kuma-"best-effort" izinhlelo zokulethwa kwamaphakethe njenge-TCP / IP phezu kwe-Ethernet. I-QoS ithuthukisa ikhwalithi yezwi noma ukudla kwamavidiyo.