Makore akati wandei apfuura, munyori akashanyira musika wenhata unogarwa neW6TRW paNorthrop Grumman car park muRedondo Beach, California. Pakati pemaTV akafanana nebere uye kuwanda kwemachaja enhare nemagetsi paive nebhokisi remuti rine kiyi, mubato wemapuranga, uye DB-25 chinobatanidza parutivi. Padivi pechibatanidza pane chinja: hafu duplex - yakazara duplex. Munyori anonzwisisa kuti chii. Modem. modem yemapuranga. Sezvineiwo, acoustically yakasanganiswa modem yakaburitswa neLivermore Data Systems kutenderera 1965.
Iyo modem ichiri kuflea market. Mushure mekutora mifananidzo, munyori akaitenga nemadhora makumi maviri.
Sezvo asiri munhu wese anoziva kuti modem yakasanganiswa chii, diki diki munhoroondo. Dambudziko nderekuti kare, kwete mitsara chete yaive midziyo yemakambani enhare. Vaitofanirawo kuhaya nharembozha. Vaya vaverengi vakawana daylap vakabatanidza mamodemu zvakanangana nemitsara yefoni. Zvino, apo modem iyi yakagadzirwa, yakarambidzwa kuita saizvozvo. Maererano nemutemo weAmerica wa1934, zvakanga zvisingabviri kubatanidza chinhu chipi nechipi kurunhare rwepamba nenzira ipi zvayo zvachose. Muna 1956, mushure meHush-A-Phone Corp v. Mutemo weUnited States wakarerutswa: zvemaziso zvakava zvinogoneka kubatanidza. Hush-A-Phone ndiyo .
Yakatenderwa zviri pamutemo kubatanidza michina yakasiyana siyana kune tambo dzenhare muUSA muna 1968 () Asi kusvika 1978, mukana uyu haugone kushandiswa, sezvo mitero, tsanangudzo uye nzira dzekupa zvitupa hazvina kugadzirwa. Naizvozvo, kubva 1956 kusvika 1978, zvine musoro kushandisa acoustically interfaced modem uye kupindura muchina. Mukuita, vakasunungurwa kwenguva refu - neinertia.
Iyi modem, ikozvino yakamira padhesiki remunyori, yakakosha asi peji isina kujairika munhoroondo. Inotangira mhinduro yeCarterphone uye saka haigone kubatana zvakananga kune network yenhare. Yakagadzirwa kusati kwagadzirwa kweakawanda machipi anoonekwa seakarembera nhasi. Yekutanga vhezheni yeiyi modem yakaburitswa kwangopera gore mushure meBell 103, yekutanga yakabudirira mukutengeserana modem. Heino muenzaniso wakanaka wekuti mangani mikana inogona kudzvanywa kubva kune gumi nematatu chete transistors. Zvino modem iyi yakakanganwika kwenguva yakareba, kusvikira mavhidhiyo maviri apfurwa pamusoro payo, imwe muna 2009, imwe muna 2011:
Vhidhiyo blogger phreakmonkey yakawana kopi yekutanga yemodemu ine nhamba ye serial inopfuura 200. Mamodemu akadaro anosiyaniswa newalnut kesi, izvo zvikamu zvakabatana nenjiva. Sekureva kwaphreakmonkey, chimiro ichi chinogona kushandiswa kuona kuti modem ine makore mangani, nekuti njiva dzinoshanda zvakanyanya. Kutanga ne serial nhamba 850, modem dzakatanga kuiswa mu teak wood kesi nebhokisi rekubatanidza. Ipapo mitezo yemuviri yakatanga kubatanidzwa nendimi. Livermore Data Systems inodiwa kugadzira modem nekukurumidza uye nekukurumidza.
Muna 2007 blogger Brent Hilpert akatarisa mune yakadaro modem uye . Chirongwa chake chinonyanya kufadza. Ese gumi nematatu transistors mumodemu aive akajairwa uye akapararira panguva iyoyo. Imwe germanium PNP transistor yakashandiswa ipapo nekuda kwechikonzero chisina kujeka kune munyori. Transistors emarudzi ese aya achiri nyore kuwana mune yekare stock nhasi. Chete anenge madhora makumi maviri - uye mumaoko ako izere seti ye transistors inodiwa kudzokorora iyo yakafanana modem. Ichokwadi, mamwe mashoko achadiwa, kusanganisira miniature transformers.
Chaizvoizvo, mumwe munhu akaburitsa acoustic interface mudziyo kubva modem, zvimwe zvinonyatsoenderana nezvinyorwa. Pane mapuranga matatu pane backplane. Pane yekutanga - zvese zvese zvePSU, kunze kweiyo transformer, pane yechipiri - modulator, pane yechitatu - demodulator. Iyo 2N5138 transistors ndeye: Vhiki 37, 1969. Zvakanga zvisingaite kunyatso kumisa zuva rekuburitsa modem pachayo, asi zvakanyanya mukana wakagadzirwa uye kutumirwa pamberi pa1970.
Rurimi uye groove connection zvinoreva modem yekunonoka kuburitsa
Munyori akatenga modem iyi kuti angoichengeta kumba. Iyi modem yemapuranga, asi kashoma chero wevanozivana nemunyori anofungidzira kuti anotonhorera sei. Ichi chinhu cheunyanzvi, umo mune zvinhu zvakawanda zvisina kujairika. Munyori akada kuzvigadzirisa, asi akaona kuti zvaisashanda.
Chekutanga, kune izvi iwe unofanirwa kuwana yekutanga acoustic interface mudziyo. Nekuda kwekushaikwa kwayo, vashanyi kumusika wenhata havana kunzwisisa kuti rudzii rwemudziyo waiva pamberi pavo. The Livermore Data Systems logo uye serial nhamba dzaive pakutanga pachigadzirwa ichi, uye ikozvino kusavapo kwavo kwakangoita kuti zviome kune vamwe vashanyi kuti vaone zvinhu semodemu, nekuti havasi vashandi vemumamyuziyamu emakombuta. Zviri kuyedza, hongu, kudhinda iwo mameseji eiyo acoustic interface mudziyo, asi maoko achasvika panguva iyi here?
Chechipiri, maparamita evazhinji capacitor zvechokwadi "akayangarara" mairi. Zvechokwadi, zvinonakidza kutora uye kuronga kuburikidza nemapuranga ose, asi kana munyori achida kuwana modem inoshanda neacoustic pairing, pane imwe nzira iri nani.
Ichi chigadziro chine hunyanzvi chinonzi "", yakagadzirwa neChaos Computer Club muna 1985 mukupindura kurambidzwa kwakafanana, iyo yakaramba ichishanda muGermany. Modem yakadaro iri nyore, uye ine mikana yakawanda. Inogadzirwa pa AM7910 chip, ichiri kuwanikwa pano neapo pakutengeswa, uye inoshanda nekumhanya kusvika ku1200 baud. Zvinokwanisika kuvaka modem kubva pakatanga pairi nekukurumidza kupfuura pane discrete transistors.
Kazhinji, hapana chikonzero chekudzoreredza iyi modem yehuni, asi zvakazove zvinonakidza kwazvo kuiparadzanisa, kuronga foto kupfura uye kudzoreredza zvese sezvazvaive. Anenge ese emagetsi aitaridzika seizvi kubva mukati, kusvikira paine mamicrocircuits mairi. Asi kana kamwe kamwe munyori akasangana neacoustic interface device yakakodzera iyi modem, iye, zvechokwadi, achafunga zvakare: zvichida ichiri kukosha kutora kugadzirisa?
Source: www.habr.com