Ma modems ojambulira amapita ku makompyuta othamanga kwambiri
Modem ndi chipangizo cha hardware chimene chimalola kompyuta kutumiza ndi kulandira deta pa telefoni kapena chingwe kapena satana. Pankhani yofalitsa foni ya analoji, yomwe poyamba inali njira yotchuka kwambiri yolumikizira intaneti, modem imatembenuza deta pakati pa mawonekedwe a analog ndi digito mu nthawi yeniyeni yolumikizana kudzera pa intaneti. Pankhani ya modemikiti yamakono yotchuka kwambiri masiku ano, chizindikirocho n'chosavuta ndipo sichifuna kutembenuka kwa analog-to-digital.
Mbiri ya Modems
Zida zoyamba zomwe zimatchedwa modems zinasintha deta yamagetsi kuti zitha kulumikiza pafoni. Kufulumira kwa modemziyi kunayesedwa kale mu baud (gawo loyesa kutchulidwa dzina la Emile Baudot), ngakhale kuti zipangizo zamakono zinayambika, miyesoyi inasinthidwa kukhala bits pamphindi . Zoyamba zamalonda zamalonda zinkathandizira liwiro la 110 bps ndipo zinagwiritsidwa ntchito ndi Dipatimenti ya Chitetezo ku United States, mauthenga a uthenga, ndi malonda ena akuluakulu.
Modems pang'onopang'ono anadziŵika kwa ogulitsa kumapeto kwa zaka za m'ma 1970 mpaka m'ma 80s monga mabungwe amtundu wa anthu ndi mauthenga monga CompuServe anamangidwa kumayambiriro kwa intaneti. Kenaka, pakuphulika kwa Webusaiti Yadziko Lonse pakati pa zaka za m'ma 1990s, ma modem adatuluka monga njira yoyamba yopezera intaneti m'mabanja ambiri padziko lonse lapansi.
Kujambula Modems
Zithunzi zamakono zomwe zimagwiritsidwa ntchito pazithunzithunzi zosinthira zimasintha deta pakati pa mawonekedwe a analoji ogwiritsidwa ntchito pa matelefoni ndi mawonekedwe a digito omwe amagwiritsidwa ntchito pa makompyuta. Ma modem ojambulira kunja amatsegula makompyuta pamapeto amodzi ndi matelefoni pamapeto ena. M'mbuyomu, ena opanga makompyuta amaphatikizapo ma modems oyendetsa mkati mkati mwa makompyuta awo.
Zamakono zamakono zamagetsi zowonjezera ma data zimatumiza deta pamlingo wopitirira 56,000 bits pamphindi. Komabe, kuchepa kwa ma telefoni a anthu pafupipafupi nthawi zambiri kumachepetsa kuchuluka kwa modem ku 33.6 Kbps kapena kuchepa pochita.
Mukamagwirizanitsa ndi intaneti pogwiritsa ntchito modem-up-up modabwitsa, zipangizozi zimadutsa kupyolera mkulankhulira zizindikiro zosiyana zomwe zimatumizidwa potumiza deta yolongosola pazowonjezera mawu. Chifukwa njira zogwirizana ndi deta zimakhala zofanana nthawi iliyonse, kumva phokoso la phokoso kumathandiza wosuta kutsimikizira ngati ntchito yogwirizana ikugwira ntchito.
Broadband Modems
Modem ya broadband monga yomwe imagwiritsidwa ntchito kwa DSL kapena ma intaneti kudzera pa intaneti amagwiritsira ntchito njira zamakono zozindikiritsira kuti zifike pamtunda wapamwamba kwambiri kuposa ma modems oyendetsa. Ma modems a Broadband nthawi zambiri amatchedwa modems othamanga kwambiri. Modems zamakono ndi mtundu wa digementi yomwe imayambitsa mgwirizano wa intaneti pakati pa foni ndi foni yam'manja .
Ma modems apansi opangira ma pulogalamu akugwiritsira ntchito pulogalamu yotsegulira kunyumba kapena chipangizo china cha pakhomo pakhomo limodzi ndi kunja kwa mawonekedwe a intaneti monga chingwe cha chingwe pamtundu wina. The router kapena chipata imatsogolera chizindikiro kwa zipangizo zonse mu bizinesi kapena kunyumba ngati pakufunika. Mawotchi ena ophatikizira amphatikizapo modem yowonjezereka ngati imodzi yokha ya hardware unit.
Ambiri opanga ma intaneti a broadband amapereka ma hardware abwino kwa makasitomala awo popanda msonkho kapena pamwezi uliwonse. Komabe, ma modems angagulidwe kudzera m'masitolo ogulitsa.