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a network firewall (a device which restricts internet requests), either protecting your network or the network of the server, may have intervened, preventing this request.
agian, sareko suebaki batek (interneteko eskaerak mugatzen dituen gailua) eskaera hau ekidin du, zure eta zerbitzariaren sarea babestuz.
Last Update: 2011-10-23
Usage Frequency: 1
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h.323 was originally created to provide a mechanism for transporting multimedia applications over lans but it has rapidly evolved to address the growing needs of voip networks. one strength of h.323 was the relatively early availability of a set of standards, not only defining the basic call model, but in addition the supplementary services, needed to address business communication expectations. h.323 was the first voip standard to adopt the ietf standard rtp to transport audio and video over ip networks. h.323 is based on the isdn q.931 protocol and is suited for interworking scenarios between ip and isdn, respectively between ip and qsig. a call model, similar to the isdn call model, eases the introduction of ip telephony into existing networks of isdn based pbx systems.
hasiera batean, multimedia-aplikazioak sare lokal bidez garraiatzeko mekanismoa eskaintzeko sortu zen h.323, baina berehala garatu zen voip sareen beharrak (gero eta handiagoak) bideratzeko. h.323ren puntu indartsu bat da oso bizkor eskaintzen duela estandar multzo bat, eta ez duela bakarrik oinarrizko deiaren modeloa definitzen, horrez gain enpresetako komunikazio-igurikimenak bideratzeko beharrezkoak diren zerbitzu gehigarriak ere eskaintzen baititu. ietf rtp estandarrarekin bat egin duen lehenengo voip estandarra da h.323, audioa eta bideoa ip sare bidez garraiatzeko. h.323 oinarrituta dago isdn q.931 protokoloan, eta egokiena da ip eta isdn arteko agertokiek elkarrekin lan egiteko, ip eta qsig artekoak, hurrenez hurren. isdn dei-modeloaren antzekoa den dei-modelo batek asko errazten du ip telefonia sartzea isdnn oinarritutako pbx sistemetako sareetan.
Last Update: 2014-08-20
Usage Frequency: 6
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