Intshayelelo kwiFCC HAC 2019 yeeMfuno zoVavanyo lweVolumu kunye neMigangatho eUnited States

I-Federal Communications Commission (FCC) e-United States idinga ukuba ukususela ngoDisemba 5, 2023, zonke izixhobo ze-terminal terminal kufuneka zihlangabezane neemfuno zomgangatho we-ANSI C63.19-2019 (okt umgangatho we-HAC 2019). Xa kuthelekiswa nohlobo oludala lwe-ANSI C63.19-2011 (HAC 2011), umahluko omkhulu phakathi kwezi zibini zilele ukongezwa kweemfuno zovavanyo lokulawula umthamo kwi-HAC 2019 standard. Izinto zokuvavanya ikakhulu zibandakanya ukuphazamiseka, ukuphendula rhoqo, kunye nokuzuza kweseshoni. Iimfuno ezifanelekileyo kunye neendlela zokuvavanya kufuneka zibhekiselele kumgangatho we-ANSI / TIA-5050-2018.
I-US FCC ikhuphe i-285076 D05 HAC Waiver DA 23-914 v01 exemption regulation ngoSeptemba 29, 2023, kunye nexesha lokuxolelwa iminyaka emi-2 ukuqala nge-5 kaDisemba 2023. D04 Volume Control v02 okanye ngokubambisana noxwebhu lwenkqubo yokukhululwa okwethutyana KDB285076 D05 HAC Waiver DA 23-914 v01 phantsi 285076 D04 Volume Control v02. Olu kukhululwa luvumela izixhobo eziphathwayo ze-terminal ezithatha inxaxheba kwisiqinisekiso ukuthoba iimfuno ezithile zovavanyo ngokuhambelana neendlela zokuvavanya ze-ANSI/TIA-5050-2018 ukuba ziphumelele uvavanyo loLawulo loMqulu.
Kuvavanyo loLawulo loMqulu, iimfuno ezithile zokuxolelwa zezi zilandelayo:
(1) Ukuvavanya i-narrowband kunye ne-broadband coding yeenkonzo zomnxeba wenethiwekhi engenazingcingo (ezifana ne-AMR NB, AMR WB, EVS NB, EVS WB, VoWiFi, njl.), iimfuno zezi zilandelayo:
I-1) Ngaphantsi koxinzelelo lwe-2N, umfaki-sicelo ukhetha umlinganiselo we-encoding ye-narrowband kunye ne-broadband encoding rate. Ngomthamo othile, kuzo zonke iinkonzo zezwi, imisebenzi yebhendi, kunye nezicwangciso ze-air port, inzuzo yeseshoni kufuneka ibe ≥ 6dB, kwaye ukuphazamiseka kunye nokuphendula rhoqo kufuneka kuhlangabezane neemfuno eziqhelekileyo.
2) Ngaphantsi koxinzelelo lwe-8N, umfaki-sicelo ukhetha umlinganiselo we-encoding ye-narrowband kunye ne-broadband encoding rate, kunye nazo zonke iinkonzo zezwi, imisebenzi yebhendi, kunye nezicwangciso ze-air port kwivolumu efanayo, inzuzo yeseshoni kufuneka ibe ≥ 6dB, endaweni yomgangatho ≥ 18dB. Ukugqwethwa kunye nokuphendula rhoqo kuyahlangabezana neemfuno zomgangatho.
(2) Kwezinye ii-encodings ze-narrowband kunye ne-broadband engakhankanywanga kwinqaku (1), inzuzo yeseshoni kufuneka ibe ≥ 6dB phantsi kweemeko zengcinezelo ye-2N kunye ne-8N, kodwa akukho mfuneko yokuvavanya ukuphazamiseka kunye nokuphendula rhoqo.
(3) Kwezinye iindlela zokufaka iikhowudi ezingakhankanywanga kwinqaku (1) (njenge-SWB, i-FB, i-OTT, njl.), Akufuneki ukuba bahlangabezane neemfuno ze-ANSI / TIA-5050-2018.
Emva kwe-5 kaDisemba, i-2025, ukuba i-FCC ayikhupheli amaxwebhu angaphezulu, uvavanyo lweVolume Control luya kwenziwa ngokungqongqo ngokuhambelana neemfuno ze-ANSI/TIA-5050-2018.
ILebhu yoVavanyo lwe-BTF inamandla okuvavanya isiqinisekiso se-HAC 2019, kuquka uphazamiseko lweRF Emission RF, uvavanyo lomqondiso weT-Coil, kunye neemfuno zolawulo lomthamo womthamo.