Awọn ẹgbẹ igbohunsafẹfẹ ibaraẹnisọrọ ti awọn oniṣẹ telecom pataki ni awọn orilẹ-ede pupọ ni ayika agbaye-1

1. China
Awọn oniṣẹ akọkọ mẹrin wa ni Ilu China,
Wọn jẹ China Mobile, China Unicom, China Telecom, ati China Broadcast Network.
Awọn ẹgbẹ igbohunsafẹfẹ GSM meji wa, eyun DCS1800 ati GSM900.
Awọn ẹgbẹ igbohunsafẹfẹ WCDMA meji wa, eyun Band 1 ati Band 8.
Awọn ẹgbẹ igbohunsafẹfẹ CDMA2000 meji wa, eyun BC0 ati BC6.
Awọn ẹgbẹ igbohunsafẹfẹ TD-SCDMA meji lo wa, eyun Band 34 ati Band 39.
Awọn ẹgbẹ igbohunsafẹfẹ LTE 6 wa,
Wọn jẹ: Band 1, Band 3, Band 5, Band 39, Band 40, ati Band 41.
Awọn ẹgbẹ igbohunsafẹfẹ NR mẹrin wa,
Wọn jẹ N41, N77, N78, ati N79, laarin eyiti N79 ko lo kaakiri lọwọlọwọ.

2. Ilu họngi kọngi, China
Awọn oniṣẹ pataki mẹrin wa ni Ilu Họngi Kọngi, China (laisi awọn oniṣẹ foju),
Wọn jẹ China Mobile (Hong Kong), Hong Kong Telecom (PCCW), Hutchison Whampoa, ati Smartone.
Awọn ẹgbẹ igbohunsafẹfẹ GSM meji wa, eyun DCS1800 ati EGSM900.
Awọn ẹgbẹ igbohunsafẹfẹ WCDMA mẹta wa, eyun: Band 1, Band 5, ati Band 8.
Iwọn igbohunsafẹfẹ CDMA2000 kan wa, eyiti o jẹ BC0.
Awọn ẹgbẹ igbohunsafẹfẹ LTE mẹrin wa, eyun Band 3, Band 7, Band 8, ati Band 40.

3. Orilẹ Amẹrika
Apapọ awọn oniṣẹ pataki 7 wa ni Amẹrika,
Wọn jẹ: AT&T, T-Mobile, Sprint, Verizon, US Cellular, C Spire Wireless, Shenandoah Telecommunications (Shentel).
Ẹgbẹ igbohunsafẹfẹ GSM kan wa, eyun PCS1900.
Awọn ẹgbẹ igbohunsafẹfẹ cdmaOne meji wa, eyun BC0 ati BC1.
Awọn ẹgbẹ igbohunsafẹfẹ WCDMA mẹta wa, eyun Band 2, Band 4, ati Band 5.
Awọn ẹgbẹ igbohunsafẹfẹ CDMA2000 mẹta wa, eyun BC0, BC1, ati BC10.
Awọn ẹgbẹ igbohunsafẹfẹ LTE 14 wa,
Wọn jẹ: Ẹgbẹ 2, Ẹgbẹ 4, Ẹgbẹ 5, Ẹgbẹ 12, Ẹgbẹ 13, Ẹgbẹ 14, Ẹgbẹ 17, Ẹgbẹ 25, Ẹgbẹ 26, Ẹgbẹ 29, Ẹgbẹ 30, Ẹgbẹ 41
Ẹgbẹ 66, Ẹgbẹ 71.

4. UK
Awọn oniṣẹ pataki mẹrin wa ni UK,
Wọn jẹ: Vodafone_ UK, BT (pẹlu EE), Hutchison 3G UK (UK mẹta), O2.
Awọn ẹgbẹ igbohunsafẹfẹ GSM meji wa, eyun DCS1800 ati EGSM900.
Awọn ẹgbẹ igbohunsafẹfẹ WCDMA meji wa, eyun Band 1 ati Band 8.
Awọn ẹgbẹ igbohunsafẹfẹ LTE 5 wa, eyun: Band 1, Band 3, Band 7, Band 20, ati Band 38.

5. Japan
Awọn oniṣẹ akọkọ mẹta wa ni Japan, eyun KDDI, NTT DoCoMo, ati SoftBank.
Awọn ẹgbẹ igbohunsafẹfẹ WCDMA 6 wa, eyun: Band 1, Band 6, Band 8, Band 9, Band 11, ati Band 19.
Awọn ẹgbẹ igbohunsafẹfẹ CDMA2000 meji wa, eyun BC0 ati BC6.
Awọn ẹgbẹ igbohunsafẹfẹ LTE 12 wa, eyun: Band 1, Band 3, Band 8, Band 9, Band 11, Band 18, Band 19, Band 21, Band 26, Band 28, Band 41, and Band 42.

Lab Idanwo BTF jẹ ile-iṣẹ idanwo ti o jẹ ifọwọsi nipasẹ Iṣẹ Ifọwọsi Orilẹ-ede China fun Igbelewọn Ibamu (CNAS), nọmba: L17568. Lẹhin awọn ọdun ti idagbasoke, BTF ni yàrá ibaramu itanna eletiriki, yàrá ibaraẹnisọrọ alailowaya, yàrá SAR, yàrá ailewu, yàrá igbẹkẹle, yàrá idanwo batiri, idanwo kemikali ati awọn ile-iṣẹ miiran. Ni ibaramu itanna pipe, igbohunsafẹfẹ redio, aabo ọja, igbẹkẹle ayika, itupalẹ ikuna ohun elo, ROHS / REACH ati awọn agbara idanwo miiran. Lab Idanwo BTF ti ni ipese pẹlu alamọdaju ati awọn ohun elo idanwo pipe, ẹgbẹ ti o ni iriri ti idanwo ati awọn amoye iwe-ẹri, ati agbara lati yanju ọpọlọpọ awọn idanwo eka ati awọn iṣoro iwe-ẹri. A ni ibamu si awọn ipilẹ itọnisọna ti “iṣododo, aiṣedeede, deede, ati lile” ati ni muna tẹle awọn ibeere ti idanwo ISO/IEC 17025 ati eto iṣakoso yàrá isọdiwọn fun iṣakoso imọ-jinlẹ. A ni ileri lati pese awọn onibara pẹlu iṣẹ ti o ga julọ. Ti o ba ni ibeere eyikeyi, jọwọ lero free lati kan si wa nigbakugba.