Ukuze kuphunyezwe izicelo zemultimedia kuthungelwano olukhoyo lonxibelelwano, i-International Telecommunication Union (ITU-T) iphuhlise i-H.32x multimedia yonxibelelwano lweprotocol series. Oku kulandelayo yinkcazo emfutshane yemigangatho ephambili
I-H.320, umgangatho wonxibelelwano lwe-multimedia kwi-narrowband yevidiyo inkqubo yefowuni kunye ne-terminal (N-ISDN);
H.321, umgangatho wonxibelelwano lwemultimedia kwi-B-ISDN;
H.322, umgangatho wonxibelelwano lwe-multimedia kwi-LAN eqinisekisiwe yiQoS;
I-H.323, umgangatho wonxibelelwano lwe-multimedia kwi-packet-switched network ngaphandle kwesiqinisekiso se-QoS;
I-H.324, umgangatho wonxibelelwano lwe-multimedia kwii-terminals zonxibelelwano lwe-bit ephantsi (PSTN kunye nenethiwekhi engenazintambo).
Phakathi kwale migangatho ingasentla, i-H.323 Standard ichaza uthungelwano lolona lusetyenziswa kakhulu, njenge-Ethernet, uphawu, i-FDDI, njl.njl.ngenxa yosetyenziso lwe-H. 323 umgangatho ngokwendalo ube yindawo eshushu kwimarike, ngoko ke siya kugxila kwi-H.323.Ingcebiso ye-H.323 ichaza amacandelo amane aphambili: iitheminali, iigeyidi, isoftware yolawulo lwesango (ekwaziwa ngokuba ngabagcini bamasango okanye isango), kunye nolawulo lweengongoma ezininzi. iiyunithi.
1, Itheminali
Zonke iitheminali kufuneka zixhase unxibelelwano lwelizwi, kunye nevidiyo kunye nedatha yonxibelelwano lwezakhono azikhethi.Zonke iitheminali ze-H.323 kufuneka kwakhona zixhase umgangatho we-H.245, olawula ukusetyenziswa kwetshaneli kunye nokusebenza.H.323 ikhankanya iiparameters eziphambili zekhowudi yezwi unxibelelwano ngelizwi ngolu hlobo lulandelayo: ITU ecetyisiweyo bandwidth yelizwi /KHz transmission bit rate /Kb/s Compression algorithm annotation G.711 3.456,64 PCM ucinezelo olulula, olusetyenziswa kwi-PSTN G.728 3.416 LD-CELP umgangatho wentetho njenge G.711, Xa isetyenziswe kwizinga elisezantsi losulelo G.722 7 48,56,64 Umgangatho wentetho ye-ADPCM ungaphezulu kune-G.711, xa usetyenziswa kugqithiso lwesantya sebhithi ephezulu G.723.1G.723.0 3.4 6.35.3 Ikhwalithi yentetho ye-LP-MLQ yamkelekile G. .723.1 isebenzisa i-G.729 kwiforum yeVOIP. G.729a 3.48CS-ACELP ukulibaziseka kungaphantsi kwe-G.723.1, umgangatho welizwi ungaphezulu kwe-G.723.1.
2, Isango
Oku kuyakhethwa kwiinkqubo ze-H.323. Isango linokuguqula iiprothokholi, i-algorithms yomsindo kunye nevidiyo yokurekhoda kunye neempawu zokulawula ezisetyenziswa ziinkqubo ezahlukeneyo ukulungiselela unxibelelwano lwee-terminals zenkqubo. Njengoko i-PSTN esekelwe kwiNkqubo ye-H.324 kunye ne-ISDN esekelwe kwi-H.320 System kunye ne-H.323 Unxibelelwano lweNkqubo, kuyimfuneko ukuqwalasela isango.
3. Umgcini-sango
Eli licandelo elikhethiweyo lenkqubo ye-H.323 elawulwa yi-software. Inemisebenzi emibini ephambili: enye kukulawula izicelo ze-H.323; Okwesibini kulawulo lonxibelelwano lwe-terminal ngesango, njengokusekwa kwefowuni, ukuchithwa, njl. Umlawuli unokwenza ukuguqulelwa kwedilesi, ukulawulwa kwe-bandwidth, ukuqinisekiswa kwefowuni, irekhodi lomnxeba, ukubhaliswa komsebenzisi, ulawulo lwesizinda sonxibelelwano kunye neminye imisebenzi ngokusebenzisa i-Gatekeeper.An I-domain ye-H.323 yonxibelelwano ingaba namasango amaninzi, kodwa isango elinye kuphela elinokusebenza.
4. Iyunithi yokulawula iingongoma ezininzi
I-MCU isebenzisa unxibelelwano lwamanqaku amaninzi kwinethiwekhi ye-IP, unxibelelwano lwe-point-to-point aludingeki. Yenza inkqubo yonke ibe yi-topology yenkwenkwezi nge-MCU. I-MCU iqulethe izinto ezimbini eziphambili: isilawuli se-multipoint MC kunye ne-multipoint processor MP, okanye ngaphandle kweMP. I-MC iqhuba ulwazi lwe-H.245 lokulawula phakathi kwee-terminals, ukuseka igama elincinci eliqhelekileyo lokucutshungulwa komsindo kunye nevidiyo. I-MC ayiqhubeki ngokuthe ngqo nayiphi na imidiya yolwazi, kodwa iyishiya kwiMP. I-MP ixuba, itshintshe, kwaye iqhubekisele phambili iaudio, ividiyo, okanye ulwazi lwedatha.
Kukho izakhiwo ezimbini ezihambelanayo zefowuni ye-IP kwishishini, enye yi-ITU-TH.323 protocol evezwe ngasentla, enye i-SIP protocol (RFC2543) ecetywayo yi-IETF, i-SIP protocol ifaneleke ngakumbi kwi-terminal ehlakaniphile.
Amanqaku emisebenzi yesoftware angasentla ngawethuI-ONUiimveliso zenethiwekhi kwishishini lesoftware, kunye nenethiwekhi efanelekileyo ethengisa iimveliso zenkampani yethu zigubungela iindidi ezahlukeneyoI-ONUseries , kuquka ACI-ONU/ unxibelelwanoI-ONU/ okrelekreleI-ONU/ ibhokisiI-ONU/ izibuko zePON ezimbiniI-ONU, njl. Konke oku kungasentlaI-ONUiimveliso series zingasetyenziselwa iimfuno womnatha indawo nganye. Wamkelekile ukuba ube nolwazi olunzulu lobugcisa bemveliso.
