{"id":29860,"date":"2019-10-31T21:32:21","date_gmt":"2019-10-31T18:32:21","guid":{"rendered":"https:\/\/prohoster.info\/blog\/legendarnye-modemy-proshlogo-luchshie-derzhateli-konnekta-v-usloviyah-otechestvennyh-ats\/"},"modified":"2019-10-31T21:32:21","modified_gmt":"2019-10-31T18:32:21","slug":"legendarnye-modemy-proshlogo-luchshie-derzhateli-konnekta-v-usloviyah-otechestvennyh-ats","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hr\/blog\/legendarnye-modemy-proshlogo-luchshie-derzhateli-konnekta-v-usloviyah-otechestvennyh-ats","title":{"rendered":"Legendarni modemi pro\u0161losti: najbolji \u010duvari veze u uvjetima doma\u0107ih ATK","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

\"Legendarni
\nTko je jednom \u010duo zvuk modemskog povezivanja s internetom preko telefonske linije, nikada ga ne\u0107e zaboraviti. Za neupu\u0107ene, to nije previ\u0161e melodi\u010dna kombinacija zvukova. Za one koji su ovisili o modemskom povezivanju, ovi zvukovi su poput \u010darobne glazbe. <\/p>\n

Sada, u 2019. godini, dial-up je za ve\u0107inu postao davna i nepotrebna tehnologija. I stvarno, spora veza s mogu\u0107no\u0161\u0107u prekida linije u najzanimljivijim trenucima neka ostane u pro\u0161losti. Danas \u0107emo razgovarati ne o vezi, ve\u0107 o ure\u0111ajima koji su je osiguravali \u2014 legendarni modemi pro\u0161losti.
\n <\/a><\/noindex>
\nI to ne o svim modemima, ve\u0107 o onima koji su mogli osigurati relativno stabilnu vezu u uvjetima doma\u0107ih telefonskih linija i ATK. Brzina povezivanja tada je bila niska (blago re\u010deno) \u2014 za mnoge je 28800 bps bila sre\u0107a, a kamoli 56000. Kasnije je do\u0161la era ADSL-a, i to je ve\u0107 bila \u010dista sre\u0107a, ali o tome \u0107emo razgovarati u drugom \u010dlanku, a sada \u2014 modemima!<\/p>\n

ZyXEL U-1496E+<\/h3>\n

\n\"Legendarni
\n
\nVjerojatno je upoznavanje mnogih \u010ditatelja s internetom po\u010delo upravo s ovim modemom. Tada se \u010dinio iznimno modernim ure\u0111ajem (i doista je bio). To je jedan od najpopularnijih modema svog vremena, jer je uspje\u0161no radio na nekim od najstarijih telefonskih linija.<\/p>\n

Njegov razvoj je vodila kompanija ZyXEL uz pomo\u0107 ruskog partnera, koji je pomogao prilagoditi modem realnostima ZND-a. Osnova modema je BIS ZyXEL, plus dodatne funkcije poput obrade glasovnih podataka i automatskog odabira broja, koji je u skladu s ruskim (rekao bih, post-sovjetskim) standardima. To je jedan od rijetkih modema koji je bio certificiran od strane Ministarstva komunikacija RF.<\/p>\n

Na popisu protokola koje podr\u017eava modem nalaze se svi standardni protokoli, uklju\u010duju\u0107i V.32bis, kao i proprietary protokoli ZyX na 19,2 i 16,8 kbit\/s, plus mobilni protokol pove\u0107ane stabilnosti ZyCELL.<\/p>\n

Modem je odr\u017eavao vezu dugi niz sati (iako ne na najvi\u0161oj brzini), dok su konkurenti mogli prekinuti vezu ve\u0107 nakon pola sata.<\/p>\n

USRobotics Courier HST Dual Standard V.34 Fax<\/h3>\n

\n\"Legendarni
\n
\nJo\u0161 jedan vrlo napredan modem za svoje vrijeme. Njegova osnova je procesor signala TMS340 s programski opremom koju su razvili in\u017eenjeri tvrtke, kao i univerzalni upravlja\u010dki procesor Intel 80C186. Postojale su dvije verzije modema \u2014 za SAD i Kanadu i me\u0111unarodna verzija.<\/p>\n

Posljednja verzija se koristila u CIS-u, budu\u0107i da je modem prilago\u0111en linijskim krugovima koji odgovaraju europskim standardima. Prilagodba se sastojala u tome da je modem podr\u017eavao vezu putem linije s vi\u0161im stalnim i promjenjivim naponom. U ovom modelu osigurana je i galvanizacija linijskih krugova od ostale sheme. Tako, ako se ne\u0161to dogodilo s linijom, nije pregorio ni modem ni ra\u010dunalo priklju\u010deno na njega.<\/p>\n

Modem je podr\u017eavao ogroman broj komunikacijskih protokola, uklju\u010duju\u0107i V.32terbo i V.FC. Tako\u0111er je imao i vlastiti protokol HST (High Speed Transfer \u2014 visoka brzina prijenosa) tvrtke USR. Zahvaljuju\u0107i tome, ure\u0111aj je radio s dva kanala \u2014 jedan je bio visoke brzine za prijenos i primanje obi\u010dnih podataka, dok je drugi bio spor, koji je radio isklju\u010divo za prijenos servisnih podataka o prolasku paketa, zahtjevima za ponovnu prijenos i sl.<\/p>\n

Modem je odr\u017eavao vezu ne\u0161to lo\u0161ije od modema tvrtke ZyXEL. Usput, pri pogor\u0161anju veze brzina se automatski smanjivala. Kada se sve normaliziralo, brzina se ponovno pove\u0107avala.<\/p>\n

ZyXEL Omni 56K uno<\/h3>\n

\n\"Legendarni
\n
\nModem s USB su\u010deljem, zadr\u017eao je uobi\u010dajeni oblik i indikatore. Me\u0111utim, umjesto Power upalio je indikator USB, no tu se ni\u0161ta ne mo\u017ee u\u010diniti. Valja napomenuti da modem nije imao dugme za resetiranje ili ne\u0161to sli\u010dno, tako da, ako se ure\u0111aj 'zaglavio', bilo je potrebno isklju\u010diti USB i ponovno priklju\u010diti ure\u0111aj. Ipak, zastoje su se rijetko doga\u0111ali.<\/p>\n

Modem se spojio na telefonsku liniju sasvim uobi\u010dajeno, \u0161to je svima poznato dijal-up korisnicima.<\/p>\n

Softver je bio na visokom nivou. U kompletu je isporu\u010dena \u010dak i vrlo poznata aplikacija VentaVoice s ruskim korisni\u010dkim su\u010deljem. Ure\u0111aj je bez problema mogao imitirati rad pravih AON i faksa, a sve je funkcioniralo bez problema.<\/p>\n

Veza se uspostavljala vrlo brzo, signal \u201elinija zauzeta\u201c obra\u0111ivan je gotovo uvijek ispravno. Ako je konekcija uspostavljena, modem ju je dr\u017eao dugi sati otprilike istom brzinom.<\/p>\n

Acorp 56EMS<\/h3>\n

\n\"Legendarni
\n
\nNipo\u0161to se ne smiju zaboraviti modemi Acorp, ako ne \u017eelimo propustiti va\u017ean dio povijesti modema. Ure\u0111aji ovog proizvo\u0111a\u010da uvijek su bili moderni i isticali su se me\u0111u sli\u010dnima.<\/p>\n

Acorp 56EMS povezivao se na COM port. Imao je sve potrebne indikatore, a na stra\u017enjem dijelu nalazili su se portovi za priklju\u010dak mikrofona i slu\u0161alica, plus dva telefonska porta. Osnova modema je bila \u010dip Rockwell. Postojala je mogu\u0107nost a\u017euriranja firmwarea zahvaljuju\u0107i Flash ROM-u.<\/p>\n

Ure\u0111aj je kompatibilan sa standardom K56Flex, upravo zahvaljuju\u0107i tome mogao je raditi brzinom do 56k.<\/p>\n

Istina, na te modeme doma\u0107e linije uticale su, i to prili\u010dno zna\u010dajno. Objavljenoj brzini moglo se dospjeti, ali to se doga\u0111alo rijetko. Bilo je problema sa konekcijom koja nije uvijek bila stabilna.<\/p>\n

No, modemi Acorp bili su znatno jeftiniji od drugih legendarnih ure\u0111aja, pa su bili jako rasprostranjeni. Kako god, na starim linijama ure\u0111aji su radili relativno dobro.<\/p>\n

D-Link DU-562M<\/h3>\n

\n\"Legendarni
\n
\nI jo\u0161 jedan USB modem koji se pojavio na tr\u017ei\u0161tu na kraju ere dial-upa. Usput, tada je postala popularna i oprema kompanije D-link, koja je ve\u0107 tada imala prepoznatljiv dizajn.<\/p>\n

Modem je bio mali, imao je samo dva indikatora \u2014 Power i Link. Njegova popularnost obja\u0161njena je nevisokom cijenom. Problem je bio \u0161to u ure\u0111aju nije bilo drugog utora za telefonski priklju\u010dak, pa se telefon morao povezati paralelno preko dodatne uti\u010dnice.<\/p>\n

Unato\u010d veli\u010dini, prili\u010dno je stabilno odr\u017eavao konekciju \u010dak i na najstarijim linijama. Istina, signal \u201ezauzeto\u201c modem je obra\u0111ivao ne najbolje, \u010desto nastavljaju\u0107i raditi i nakon \u0161to su se \u010duli tonovi tona.<\/p>\n

U paketu je isporu\u010deno softver Classic Phone Tools, koji je omogu\u0107avao kori\u0161tenje modema kao faksa. Rad programa nije izazivao nikakve pritu\u017ebe.<\/p>\n

To bi bilo sve za sada \u2014 ako \u010dlanak bude tra\u017een, objavit \u0107emo i drugi dio. Ali bolje \u2014 navedite u komentarima one modele modema koji su se vama posebno svidjeli. Ponostalgirajmo zajedno.<\/p>\n

Izvor: habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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