ʻO CDMA, kahi i kū i ka'Āpana PālaliʻOihana Mokuna , he polokalamu hana kelepona paʻakikī paʻakikī i GSM , ke kiʻina o ka pūnaewele pūnaewele nui loa o ka honua.
Ua lohe pahaʻoe i kēia mau meaʻaeʻa i ka'ōleloʻiaʻanaʻaʻole hiki iāʻoe ke hoʻohana i kekahi kelepona ma kāu pūnaewele pūnaewele no ka mea e hoʻohana nei lākou i nāʻenehana likeʻole e likeʻole me kekahi i kekahi. Eia kekahi laʻana, hiki ke loaʻa iāʻoe kahi lekiō AT & T e hikiʻole ke hoʻohanaʻia ma ka pūnaewele Verizon no kēia kumu.
Ua hoʻokumu muaʻia ka standard CDMA e Qualcomm ma ka US a hoʻohana muaʻia i ka US a me nā'āpana o'Asia e nā meaʻoihana'ē aʻe.
ʻO wai o nā'eneke CDMA?
Ma waena o nā pūnaewele pūnaewele kaulana loaʻelima, eia ka mahele o CDMA a me GSM:
CDMA:
- Kū'ē
- Verizon Wireless
- ʻO Virgin Mobile
GSM:
- T-Mobile
- ʻOi & T
Nāʻike hou aku ma ka CDMA
Hoʻohana ka CDMA i kahi "spread spectrum" technique kahi e hoʻolahaʻia ai ka ikehu electromagnetic e hāʻawi ai i hōʻailona me kahi bandwīwī nui . ʻO kēia ka mea eʻae ai i ka lehulehu i nā keleponaʻokoʻa e "hoʻonui"ʻia ma luna o ka pūnaehana like e hoʻokaʻawale i kahi bandwīwī o nā alapine.
Me kaʻenehana CDMA, hoʻokaʻawaleʻia nā paakikiʻikepili a me nā leo e hoʻohana ana i nā code a laila hoʻounaʻia me ka hoʻohanaʻana i ka palena ākea. Ma muli o ka hoʻokaʻawale pinepineʻana o nā māhele no kaʻikepili me ka CDMA, ua lilo kēia kulana i mea maikaʻi no ka punaewele punaewele 3G kiʻekiʻe.
CDMA a me GSM
ʻO ka hapanui o ka poʻe ponoʻole lākou e hopohopo no kahi o ka pūnaewele pūnaewele i koho ai i keʻano o kaʻoihana iʻoi aku ka maikaʻi. Eia naʻe, aia kekahi mauʻokoʻa nui e nānā mākou maʻaneʻi.
ʻO Coverage
ʻOiaiʻo CDMA a me GSM hoʻokūkū i ke poʻo ma keʻano o ka wikiwiki o ka wikiwiki kiʻekiʻe,ʻoi aku ka holomua o ka GSM ma muli o nā kaʻina holo wāwae a me nā holo moana.
Hoʻoikaika kaʻenehana GSM e uhi i nā wahi kaiaulu ma ka US ma mua o ka CDMA. Ma hope o ka manawa, ua lanakila ka CDMA ma waho o kaʻenehana TDMA ( Time Division Multiple Access ) i hoʻonuiʻia, i hoʻokomoʻia i loko o ka GSM kūlana kiʻekiʻe.
Hoʻokaʻawale Pūnaewele a me nā Kāleka SIM
He mea maʻalahi ke kāpiliʻana i nā leka ma kahi pūnaewele GSM a me CDMA. ʻO kēia ke kumu no ka hoʻohanaʻana o nā GPS GSM i kā Kelekia hoʻohuliʻia no ka mālamaʻana i nāʻike e pili ana i ka mea hoʻohana ma ka pūnaewele GSM, akāʻaʻole nā CDMA. Ma kahi haka, hoʻohana nā CDMA i nāʻikepili ma kaʻaoʻao kikowaena o ka mea kākoʻo e hōʻoia i kaʻano o nāʻikepili i mālamaʻia e nā GSM i ko lākou mau kāki SIM.
ʻO kēia keʻano o nā kāleka SIM ma nā pūnaewele GSM e loli. No ka laʻana, ināʻoe ma ka pūnaewele AT & T, a no laila he kāleka AT & T SIM ma kāu kelepona, hiki iāʻoe ke wehe a hoʻokomo iā ia i kahi pūnaewele GSM'ē aʻe, e like me kahi T-Mobile phone, e hoʻololi i kāuʻikepili o kāu mau inoa a pau. , me kāu helu kelepona.
ʻO ka hana maikaʻi o kēia mea e hiki iāʻoe ke hoʻohana i kahi lemu T-Mobile ma ka pūnaewele AT & T.
ʻAʻole hiki ke loliʻano maʻalahi like me ka nui o nā CDMA, keʻole lākou e lawe i nā kāleka. Ma kahi kūpono, ponoʻoe i kaʻaeʻana o kāu mea lawe e hana i keʻano o keʻano.
No ka paʻakikiʻole o GSM a me CDMA i kekahi i kekahi,ʻaʻole hiki iāʻoe ke hoʻohana i kahi kikowaena Sprint ma kahi pūnaewele T-Mobile, a iʻole kahi Verizon Wireless phone with AT & T. Pēlā keʻano no nā hui likeʻole a me nā mea halihali e hiki ai iāʻoe ke hana i loko o ka list CDMA a GSM mai luna mai.
Kōkuhi: nā kāwili CDMA e hoʻohana ana i nā kāleka SIM no ka meaʻo ia ka pae LTE e koi ai a no ka mea he pohihihi ka SIM no kaʻaeʻana i nā pūnaewele GSM'ē aʻe. Akā,ʻo ka poʻe e halihali nei, ke hoʻohana nei lākou i kaʻenehana CDMA no ka mālamaʻana i nāʻikepili pūnaewele.
Kekahi hoʻokahi a me ka hoʻohanaʻana i kaʻikepili
ʻO ka hapa nui o kā CDMA pūnaeweleʻaʻole eʻae i ka leo a me nāʻikeʻikepili i ka manawa hoʻokahi. ʻO kēia ke kumu e hoʻopukaʻia aiʻoe i nā leka uila a me nāʻike leka uila pūnaewele i ka manawa e hoʻopau aiʻoe i kahi leo mai kahi kālua CDMA e like me Verizon. Ua paʻa kaʻikepili i ka wā e kelepona aiʻoe.
Eia nō naʻe, e hoʻomaopopoʻoe i ka hana maikaʻi loa o kēlāʻano pilikino i ka wā e kelepona aiʻoe ma kahi kelepona wifi no ka meaʻaʻole i hoʻohanaʻia e WIFI, ma ka ho'ākākaʻana, ka pūnaewele lawe.