{"id":85741,"date":"2020-06-19T01:42:40","date_gmt":"2020-06-18T23:42:40","guid":{"rendered":"https:\/\/prohoster.info\/blog\/administrirovanie\/peredacha-dannyh-na-rasstoyanie-do-20-km-po-obychnym-provodam-legko-esli-eto-shdsl"},"modified":"2020-06-19T01:42:40","modified_gmt":"2020-06-18T23:42:40","slug":"peredacha-dannyh-na-rasstoyanie-do-20-km-po-obychnym-provodam-legko-esli-eto-shdsl","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/administrirovanie\/peredacha-dannyh-na-rasstoyanie-do-20-km-po-obychnym-provodam-legko-esli-eto-shdsl","title":{"rendered":"Transferimi i t\u00eb dh\u00ebnave n\u00eb nj\u00eb distanc\u00eb deri n\u00eb 20 km p\u00ebrmes kabllove t\u00eb zakonshme? E leht\u00eb, n\u00ebse kjo \u00ebsht\u00eb SHDSL\u2026","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Pavar\u00ebsisht p\u00ebrhapjes s\u00eb gjer\u00eb t\u00eb rrjeteve Ethernet, teknologjit\u00eb e komunikimit q\u00eb bazohen n\u00eb DSL vazhdojn\u00eb t\u00eb mbajn\u00eb r\u00ebnd\u00ebsin\u00eb e tyre edhe sot. Akoma, DSL mund t\u00eb gjendet n\u00eb rrjetet e fundit t\u00eb miljes p\u00ebr lidhjen e pajisjeve t\u00eb abonent\u00ebve me rrjetin e ofruesve t\u00eb internetit, dhe s\u00eb fundmi, teknologjia po p\u00ebrdoret gjithnj\u00eb e m\u00eb shum\u00eb p\u00ebr nd\u00ebrtimin e rrjeteve lokale, p\u00ebr shembull, n\u00eb aplikime industriale, ku DSL vepron si nj\u00eb plot\u00ebsues p\u00ebr Ethernet ose rrjetet fushore q\u00eb bazohen n\u00eb RS-232\/422\/485. Zgjidhjet industriale t\u00eb tilla po aplikohen aktivisht n\u00eb vendet e zhvilluara evropiane dhe aziatike.<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<p>DSL p\u00ebrb\u00ebn nj\u00eb familje standardesh, t\u00eb cilat fillimisht ishin menduar p\u00ebr transmetimin e t\u00eb dh\u00ebnave digjitale p\u00ebrmes linjave telefonike. Historikisht, kjo ishte teknologjia e par\u00eb e qasjes me band\u00eb t\u00eb gjer\u00eb n\u00eb internet, e cila z\u00ebvend\u00ebsoi DIAL UP dhe ISDN. Diversiteti i madh i standardeve aktuale t\u00eb DSL \u00ebsht\u00eb lidhur me faktin se shum\u00eb kompani, duke filluar nga vitet '80, u p\u00ebrpoq\u00ebn t\u00eb zhvillonin dhe promovonin teknologjin\u00eb e tyre n\u00eb treg.<\/p>\n<p>T\u00eb gjitha k\u00ebto zhvillime mund t\u00eb ndahen n\u00eb dy kategrori t\u00eb m\u00ebdha \u2013 teknologji asimetrike (ADSL) dhe simetrike (SDSL). Teknologjit\u00eb asimetrike jan\u00eb ato ku shpejt\u00ebsia e lidhjes hyr\u00ebse ndryshon nga shpejt\u00ebsia e trafikut d\u00ebrgues. Teknologjit\u00eb simetrike, nga ana tjet\u00ebr, kan\u00eb shpejt\u00ebsi t\u00eb barabarta p\u00ebr marrjen dhe d\u00ebrges\u00ebn.<\/p>\n<p>Standardet m\u00eb t\u00eb njohura dhe m\u00eb t\u00eb p\u00ebrhapura asimetrike jan\u00eb, n\u00eb m\u00ebnyr\u00eb specifike, ADSL (n\u00eb versionin e fundit \u2013 ADSL2+) dhe VDSL (VDSL2), nd\u00ebrsa ato simetrike \u2013 HDSL (profil i vjet\u00ebr) dhe SHDSL. Ato dallohen nga nj\u00ebra-tjetra p\u00ebr shkak se operojn\u00eb n\u00eb frekuenca t\u00eb ndryshme, p\u00ebrdorin m\u00ebnyra t\u00eb ndryshme kodimi dhe modulacioni n\u00eb linj\u00ebn fizike t\u00eb komunikimit. Gjithashtu, dallohen p\u00ebr metodat e korrigjimit t\u00eb gabimeve, duke siguruar k\u00ebshtu nj\u00eb nivel t\u00eb ndrysh\u00ebm t\u00eb q\u00ebndrueshm\u00ebris\u00eb ndaj nd\u00ebrhyrjeve. Si p\u00ebrfundim, \u00e7do teknologji ka kufij t\u00eb vet n\u00eb shpejt\u00ebsi dhe distanc\u00eb p\u00ebr transferimin e t\u00eb dh\u00ebnave, p\u00ebrfshir\u00eb var\u00ebsisht nga tipi dhe cil\u00ebsia e kabllit.<\/p>\n<p><img decoding=\"async\" alt=\"Transferimi i t\u00eb dh\u00ebnave n\u00eb nj\u00eb distanc\u00eb deri n\u00eb 20 km p\u00ebrmes kabllove t\u00eb zakonshme? E leht\u00eb, n\u00ebse kjo \u00ebsht\u00eb SHDSL\u2026\" src=\"\/wp-content\/uploads\/2020\/06\/595d2a4957280205945269a5386404cd.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Parametrat kufitar\u00eb t\u00eb standardeve t\u00eb ndryshme DSL <\/i><\/p>\n<p>N\u00eb \u00e7do teknologji DSL, shpejt\u00ebsia e transferimit t\u00eb t\u00eb dh\u00ebnave bie me rritjen e gjat\u00ebsis\u00eb s\u00eb kabllit. N\u00eb distanca ekstreme \u00ebsht\u00eb e mundur t\u00eb arrihet nj\u00eb shpejt\u00ebsi prej disa qindra kilobit\u00ebsh, por p\u00ebr transferimin e t\u00eb dh\u00ebnave mbi 200-300 m, shpejt\u00ebsia maksimale e mundshme \u00ebsht\u00eb e dobishme. <\/p>\n<p>Nd\u00ebr t\u00eb gjitha teknologjit\u00eb, SHDSL ka nj\u00eb avantazh t\u00eb r\u00ebnd\u00ebsish\u00ebm q\u00eb e b\u00ebn t\u00eb mundshme aplikimin e saj n\u00eb aplikacione industriale \u2014 q\u00ebndrueshm\u00ebria e lart\u00eb ndaj nd\u00ebrhyrjeve dhe mund\u00ebsia e p\u00ebrdorimit t\u00eb \u00e7do lloji kablli p\u00ebr transferimin e t\u00eb dh\u00ebnave. N\u00eb standardet asimetrike kjo nuk \u00ebsht\u00eb e pranueshme, dhe cil\u00ebsia e lidhjes varet shum\u00eb nga cil\u00ebsia e linj\u00ebs q\u00eb p\u00ebrdoret p\u00ebr transferimin e t\u00eb dh\u00ebnave. Ve\u00e7an\u00ebrisht, rekomandohet p\u00ebrdorimi i kabllit telefonik t\u00eb b\u00ebr\u00eb me fije t\u00eb twistuar. N\u00eb k\u00ebt\u00eb rast, nj\u00eb zgjidhje m\u00eb e besueshme p\u00ebrve\u00e7 ADSL dhe VDSL \u00ebsht\u00eb p\u00ebrdorimi i kabllit optik.<\/p>\n<p>P\u00ebr SHDSL p\u00ebrshtatet \u00e7do pal\u00eb e izoluar nga nj\u00ebra-tjetra \u2014 bakri, alumini, \u00e7elik etj. Si mjedis transferimi mund t\u00eb sh\u00ebrbej\u00eb instalimi i vjet\u00ebr elektrik, linjat e vjetra telefonike, tela me gjemba t\u00eb gardheve etj.<\/p>\n<p><img decoding=\"async\" alt=\"Transferimi i t\u00eb dh\u00ebnave n\u00eb nj\u00eb distanc\u00eb deri n\u00eb 20 km p\u00ebrmes kabllove t\u00eb zakonshme? E leht\u00eb, n\u00ebse kjo \u00ebsht\u00eb SHDSL\u2026\" src=\"\/wp-content\/uploads\/2020\/06\/1af1091e3f0e24a968fd94e1c125e83c.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Var\u00ebsia e shpejt\u00ebsis\u00eb s\u00eb transferimit t\u00eb t\u00eb dh\u00ebnave SHDSL nga distanca dhe lloji i kabllit<\/i><\/p>\n<p>Nga grafiku i var\u00ebsis\u00eb s\u00eb shpejt\u00ebsis\u00eb s\u00eb transmetimit t\u00eb t\u00eb dh\u00ebnave nga distanca dhe lloji i telit, i paraqitur p\u00ebr SHDSL, shihet se telat me seksion m\u00eb t\u00eb madh lejojn\u00eb transmetimin e informacionit n\u00eb nj\u00eb distanc\u00eb m\u00eb t\u00eb madhe. Fal\u00eb teknologjis\u00eb, \u00ebsht\u00eb e mundur t\u00eb organizohet lidhja n\u00eb nj\u00eb distanc\u00eb deri n\u00eb 20 km me shpejt\u00ebsin\u00eb maksimale t\u00eb mundshme prej 15.3 Mb\/s p\u00ebr kabllin me 2 tel ose 30 Mb p\u00ebr kabllin me 4 tel. N\u00eb aplikime reale, shpejt\u00ebsia e transmetimit mund t\u00eb vendoset manualisht, gj\u00eb q\u00eb \u00ebsht\u00eb e nevojshme n\u00eb kushte t\u00eb interferencave elektromagnetike t\u00eb forta ose cil\u00ebsis\u00eb s\u00eb dob\u00ebt t\u00eb linj\u00ebs. N\u00eb k\u00ebt\u00eb rast, p\u00ebr t\u00eb rritur distanc\u00ebn e transmetimit, nevojitet t\u00eb ulet shpejt\u00ebsia e pun\u00ebs s\u00eb pajisjeve SHDSL. P\u00ebr llogaritjen e sakt\u00eb t\u00eb shpejt\u00ebsis\u00eb n\u00eb var\u00ebsi t\u00eb distanc\u00ebs dhe llojit t\u00eb telit, mund t\u00eb p\u00ebrdoren mjete softuerike falas, t\u00eb tilla si <noindex><a rel=\"nofollow\" href=\"https:\/\/www.phoenixcontact.com\/online\/portal\/ru\/pxc\/product_detail_page\/!ut\/p\/z1\/3VfdbtowFH4VdsGlsRM7P0zaBUtRgQ5E-WlJbiLHcTp3hLAQoOVZ9hjb3bRn4JHmBKqVrU2koVw0kRXHjs93vnPsz7KhA2fQWdCNuKOJiBZ0Ltu2o7umemV1LonSN1u4ja6bWmdo4anV6-rwBjrQSagHbSX9mgsvpvEjtON1vE47lsKHtmoglaBm2o6CoWVdQXsIkAmQAhCW7wxDJHMO7f23_a_99_2P_c8aqE2sWns2aQ8u2qOaipBSa086QB3LP0-It3n88MiATj79gz165WmhYnsnb0jGIBuQ42Icr93R1B3OrNEU2pKQ8apHmarbjeBbOF1EcSjnZ5zlmKVJNrQg0JDKAQ68ABBqYuAFFAOfcIXqvuIx04QdVODhEp3poQBeLRcelwpvnpucXu5iucGp3sT9169OCzosWiT8IYGzVEp1tOVeHX2OQl7A8ZocWP2jxD8ijTnjYsNjiZTSjyN_zZILnlAxX3UTHnZPJfu3hJd-EEY-P1pHK5HuFSdYsj1JqR_6GPvygt4lypwu7tb0LosoPya9gjFpFYzJqF5MegX1pFdQT3oF9aRXUE_9CuqpX8G116_gHtFGFYxJfYsxyY51LKC9fGAgYkBIFn5G6L30_uHJuTwuCy9sbFnYQA05tHH05x7GussUrODIHFKxqKOj4aqO5mKVZIbye8TDKOFuahZHc_eEcx0xhRGEZdvXkAYI0xmghhIAAyk08DVumk2jYHKujNcvDB4hmsekryam8sKAsbwwIOQDhnyie1TBBKsF8BYpF14vFX5cLrxabnJUrVT47rnsc6-aPYLP0U18qpvlf-hmGYYmTguYztA9sXub7XYShJZnHqtHvJtwb_esmAgfbQ7FHQy0zfPyBgx2QXgLZLC7j4MXqk-td78BGy9hmg!!\/p0\/IZ7_82KCHG41M8A3E0Q95HPC3UCJ67=CZ6_82KCHG41M8A3E0Q95HPC3UCJI6=LA0=EdownloadId!2539683=action!downloadFile==\/#Z7_82KCHG41M8A3E0Q95HPC3UCJ67\">SHDSL-kalkulatori nga Phoenix Contact<\/a><\/noindex>. <\/p>\n<h3>\u00c7far\u00eb e b\u00ebn SHDSL me nj\u00eb q\u00ebndres\u00eb t\u00eb lart\u00eb ndaj interferencave?<\/h3>\n<p>\nPrincipi i funksionimit t\u00eb transmetuesit SHDSL mund t\u00eb paraqitet si nj\u00eb diagram bllokesh, ku shquhet nj\u00eb pjes\u00eb specifike dhe e pavarur (invariante) nga pik\u00ebpamja e aplikacionit. Pjesa e pavarur p\u00ebrb\u00ebhet nga blloqe funksionale PMD (Var\u00ebsi nga Mjeti Fizik) dhe PMS-TC (Shtresa TC e Var\u00ebsis\u00eb nga Mjeti Fizik), nd\u00ebrsa pjesa specifike p\u00ebrfshin nivelin TPS-TC (Shtresa TC e Var\u00ebsis\u00eb nga Protokolli t\u00eb Transmitimit) dhe nd\u00ebrfaqet e t\u00eb dh\u00ebnave t\u00eb p\u00ebrdoruesit. <\/p>\n<p>Linia fizike e komunikimit nd\u00ebrmjet transmetuesve (STU) mund t\u00eb ekzistoj\u00eb si nj\u00eb ose disa kabuj me nj\u00eb \u00e7ift. N\u00eb rastin e disa \u00e7ifteve kabujsh, STU p\u00ebrmban disa blloqe t\u00eb pavarura PMD, t\u00eb lidhura me nj\u00eb t\u00eb vet\u00ebm PMS-TC.<\/p>\n<p><img decoding=\"async\" alt=\"Transferimi i t\u00eb dh\u00ebnave n\u00eb nj\u00eb distanc\u00eb deri n\u00eb 20 km p\u00ebrmes kabllove t\u00eb zakonshme? E leht\u00eb, n\u00ebse kjo \u00ebsht\u00eb SHDSL\u2026\" src=\"\/wp-content\/uploads\/2020\/06\/c567db51783bca082459a61b9a216274.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Modeli funksional i transmetuesit SHDSL (STU)<\/i><\/p>\n<p>Moduli TPS-TC \u00ebsht\u00eb i varur nga aplikacioni n\u00eb t\u00eb cilin p\u00ebrdoret pajisja (Ethernet, RS-232\/422\/485 etj.). Detyra e tij \u00ebsht\u00eb t\u00eb konvertoj\u00eb t\u00eb dh\u00ebnat e p\u00ebrdoruesit n\u00eb formatin SHDSL, duke realizuar shum\u00ebfishimin\/demultipleksimin dhe ndreqjen e koh\u00ebs p\u00ebr disa kanale t\u00eb t\u00eb dh\u00ebnave t\u00eb p\u00ebrdoruesit.<\/p>\n<p>N\u00eb nivelin PMS-TC krijohen kadra SHDSL dhe sinkronizimi i tyre b\u00ebhet, si dhe skrambllimi dhe deskrambllimi.<\/p>\n<p>Moduli PMD kryen funksionet e kodimit\/dekodimit t\u00eb informacionit, modulacionit\/demodulacionit, anulimin e jehon\u00ebs, p\u00ebrputhjen e parametrave n\u00eb linj\u00ebn e komunikacionit dhe vendosjen e lidhjeve midis transmetuesve dhe marr\u00ebsve. Pik\u00ebrisht n\u00eb nivelin PMD kryhen operacione kryesore q\u00eb sigurojn\u00eb q\u00ebndres\u00eb t\u00eb lart\u00eb ndaj ndotjes SHDSL, duke p\u00ebrfshir\u00eb kodimin TCPAM (kodim Trellis me modulacion analogor-dh\u00ebmb\u00ebz), mekanizmin e kodimit dhe modulacionit t\u00eb p\u00ebrbashk\u00ebt, ku p\u00ebrmir\u00ebsohet efikasiteti spektral i sinjalit krahasuar me metod\u00ebn e ndar\u00eb. Principi i funksionimit t\u00eb modulit PMD gjithashtu mund t\u00eb paraqitet n\u00eb form\u00ebn e nj\u00eb diagrami funksional.<\/p>\n<p><img decoding=\"async\" alt=\"Transferimi i t\u00eb dh\u00ebnave n\u00eb nj\u00eb distanc\u00eb deri n\u00eb 20 km p\u00ebrmes kabllove t\u00eb zakonshme? E leht\u00eb, n\u00ebse kjo \u00ebsht\u00eb SHDSL\u2026\" src=\"\/wp-content\/uploads\/2020\/06\/4e13986a9bfe9541f49b886d6b27499d.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Diagrami i bllokut t\u00eb modulit PMD<\/i><\/p>\n<p>Baza e TC-PAM \u00ebsht\u00eb p\u00ebrdorimi i koduesit konvultiv, i cili formon nj\u00eb varg t\u00eb tep\u00ebrt bit\u00ebsh n\u00eb an\u00ebn e transmetuesit SHDSL. N\u00eb \u00e7do taktim pune, \u00e7do bit q\u00eb hyn n\u00eb kodues i p\u00ebrgjigjet nj\u00eb biti t\u00eb dyfisht\u00eb (dibit) n\u00eb dalje. K\u00ebshtu, me nj\u00eb tepric\u00eb relativisht t\u00eb vog\u00ebl, rritet q\u00ebndrueshm\u00ebria ndaj interferencave gjat\u00eb transmetimit. P\u00ebrdorimi i modulacionit Trellis lejon t\u00eb zvog\u00eblohet brezi i frekuenc\u00ebs s\u00eb p\u00ebrdorur p\u00ebr transmetimin e t\u00eb dh\u00ebnave dhe thjeshton komponentin harduerik pa ndryshuar raportin sinjal\/zhurm\u00eb.<\/p>\n<p><img decoding=\"async\" alt=\"Transferimi i t\u00eb dh\u00ebnave n\u00eb nj\u00eb distanc\u00eb deri n\u00eb 20 km p\u00ebrmes kabllove t\u00eb zakonshme? E leht\u00eb, n\u00ebse kjo \u00ebsht\u00eb SHDSL\u2026\" src=\"\/wp-content\/uploads\/2020\/06\/91c1c89e9e011dd3a080632c2c906c81.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Principi i pun\u00ebs s\u00eb koduesit Trellis (TC-PAM 16)<\/i><\/p>\n<p>Bit i dyfisht\u00eb formohet si rezultat i nj\u00eb operacioni logjik t\u00eb mbledhjes modulo 2 (ose ekskluzive) mbi baz\u00ebn e bitit hyr\u00ebs x1(tn) dhe bit\u00ebve x1(tn-1), x1(tn-2) etj. (mundi t\u00eb jen\u00eb deri n\u00eb 20), t\u00eb cil\u00ebt hyn\u00eb n\u00eb kodues deri m\u00eb tani dhe q\u00eb jan\u00eb ruajtur n\u00eb regjistrat e memories. N\u00eb takimin e ardhsh\u00ebm t\u00eb pun\u00ebs s\u00eb koduesit tn+1 do t\u00eb ndodhi zhvendosja e bit\u00ebve n\u00eb qelizat e memories p\u00ebr t\u00eb kryer operacionin logjik: bit x1(tn) do t\u00eb zhvendoset n\u00eb memory, duke zhvendosur t\u00eb gjith\u00eb sekvenc\u00ebn e ruajtur t\u00eb bit\u00ebve.<\/p>\n<p><img decoding=\"async\" alt=\"Transferimi i t\u00eb dh\u00ebnave n\u00eb nj\u00eb distanc\u00eb deri n\u00eb 20 km p\u00ebrmes kabllove t\u00eb zakonshme? E leht\u00eb, n\u00ebse kjo \u00ebsht\u00eb SHDSL\u2026\" src=\"\/wp-content\/uploads\/2020\/06\/e449284b9481227acc061043047ca707.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Algoritmi i koduesit konvultiv<\/i><\/p>\n<p><img decoding=\"async\" alt=\"Transferimi i t\u00eb dh\u00ebnave n\u00eb nj\u00eb distanc\u00eb deri n\u00eb 20 km p\u00ebrmes kabllove t\u00eb zakonshme? E leht\u00eb, n\u00ebse kjo \u00ebsht\u00eb SHDSL\u2026\" src=\"\/wp-content\/uploads\/2020\/06\/0c4d4edc46001efd7cdc5b51bf4939b0.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Tabelat e v\u00ebrtet\u00ebs s\u00eb operacionit t\u00eb mbledhjes modulo 2<\/i><\/p>\n<p>P\u00ebr t\u00eb ilustruar leht\u00eb, \u00ebsht\u00eb e dobishme t\u00eb p\u00ebrdorni nj\u00eb diagram t\u00eb gjendjes s\u00eb koduesit konvulutiv, n\u00eb t\u00eb cilin mund t\u00eb shihni se cila \u00ebsht\u00eb gjendja e koduesit n\u00eb momentet e koh\u00ebs tn, tn+1 etj., var\u00ebsisht nga t\u00eb dh\u00ebnat hyr\u00ebse. N\u00eb k\u00ebt\u00eb rast, gjendja e koduesit p\u00ebrfshin nj\u00eb pal\u00eb vlerash t\u00eb bitit hyr\u00ebs x1(tn) dhe bitit n\u00eb qelin\u00eb e par\u00eb t\u00eb memories x1(tn-1). P\u00ebr nd\u00ebrtimin e diagramit, mund t\u00eb p\u00ebrdorni nj\u00eb grafik, ku n\u00eb kulmet e tij ndodhen gjendjet e mundshme t\u00eb koduesit, dhe kalimet nga nj\u00eb gjendje n\u00eb tjetr\u00ebn jan\u00eb t\u00eb sh\u00ebnuara me bitat p\u00ebrkat\u00ebs hyr\u00ebs x1(tn) dhe bitat e daljes $inline$y &#8320;y &#8321;(t &#8320;)$inline$.<\/p>\n<p><img decoding=\"async\" alt=\"Transferimi i t\u00eb dh\u00ebnave n\u00eb nj\u00eb distanc\u00eb deri n\u00eb 20 km p\u00ebrmes kabllove t\u00eb zakonshme? E leht\u00eb, n\u00ebse kjo \u00ebsht\u00eb SHDSL\u2026\" src=\"\/wp-content\/uploads\/2020\/06\/8e01a39fece83662d076669bf8c77b11.png\" style=\"display:block;margin: 0 auto;\" \/> <img decoding=\"async\" alt=\"Transferimi i t\u00eb dh\u00ebnave n\u00eb nj\u00eb distanc\u00eb deri n\u00eb 20 km p\u00ebrmes kabllove t\u00eb zakonshme? E leht\u00eb, n\u00ebse kjo \u00ebsht\u00eb SHDSL\u2026\" src=\"\/wp-content\/uploads\/2020\/06\/643572f5d0ac164647d2e217c34dbb70.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Diagrami i gjendjeve dhe grafi i kalimeve t\u00eb koduesit konvencional t\u00eb transmetuesit<\/i><\/p>\n<p>N\u00eb transmetues, bazuar n\u00eb kat\u00ebr bit\u00ebt e marr\u00eb (dy bit\u00ebt dal\u00ebse t\u00eb koduesit dhe dy bit\u00ebt e t\u00eb dh\u00ebnave), formohet nj\u00eb simbol, secilit prej t\u00eb cil\u00ebve i p\u00ebrfitohet nj\u00eb amplitud\u00eb e sinjalit t\u00eb moduluesit t\u00eb modulimit analogo-puls. <\/p>\n<p><img decoding=\"async\" alt=\"Transferimi i t\u00eb dh\u00ebnave n\u00eb nj\u00eb distanc\u00eb deri n\u00eb 20 km p\u00ebrmes kabllove t\u00eb zakonshme? E leht\u00eb, n\u00ebse kjo \u00ebsht\u00eb SHDSL\u2026\" src=\"\/wp-content\/uploads\/2020\/06\/c34bf16aa823477cc737a995bbabc034.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Gjendja e 16-bit AIM n\u00eb var\u00ebsi t\u00eb vler\u00ebs s\u00eb simbolit kat\u00ebr-bit<\/i><\/p>\n<p>N\u00eb an\u00ebn e marr\u00ebsit t\u00eb sinjalit ndodh procesi i kund\u00ebrt \u2013 de-modulimi dhe ndarja nga kodi i tepruar (bitet e dyfishta y0y1(tn)) i sekuenc\u00ebs s\u00eb nevojshme t\u00eb bit\u00ebve hyr\u00ebs t\u00eb koduesit x1(tn). K\u00ebt\u00eb operacion e kryen dekoderi Viterbi.<\/p>\n<p>Algoritmi i dekoderit bazohet n\u00eb llogaritjen e metrik\u00ebs s\u00eb gabimeve p\u00ebr t\u00eb gjitha gjendjet e supozuara t\u00eb koduesit. Me metrik\u00ebn e gabimeve kuptohet ndryshimi midis bit\u00ebve t\u00eb pranuar dhe bit\u00ebve t\u00eb supozuar p\u00ebr \u00e7do rrug\u00eb t\u00eb mundshme. N\u00ebse nuk ka gabime n\u00eb pranimin, at\u00ebher\u00eb metrika e gabimeve p\u00ebr rrug\u00ebn e v\u00ebrtet\u00eb do t\u00eb jet\u00eb 0, sepse nuk ka dallim n\u00eb bit\u00eb. P\u00ebr rrug\u00ebt e gabuara, metrika do t\u00eb ndryshoj\u00eb nga zeroja, do t\u00eb rritet vazhdimisht dhe pas nj\u00eb koh\u00eb dekoderi do t\u00eb ndaloj\u00eb llogaritjen e rrug\u00ebs s\u00eb gabuar, duke l\u00ebn\u00eb vet\u00ebm rrug\u00ebn e v\u00ebrtet\u00eb.<\/p>\n<p><img decoding=\"async\" alt=\"Transferimi i t\u00eb dh\u00ebnave n\u00eb nj\u00eb distanc\u00eb deri n\u00eb 20 km p\u00ebrmes kabllove t\u00eb zakonshme? E leht\u00eb, n\u00ebse kjo \u00ebsht\u00eb SHDSL\u2026\" src=\"\/wp-content\/uploads\/2020\/06\/502605db8f45931a714b10096dd9bf20.png\" style=\"display:block;margin: 0 auto;\" \/> <img decoding=\"async\" alt=\"Transferimi i t\u00eb dh\u00ebnave n\u00eb nj\u00eb distanc\u00eb deri n\u00eb 20 km p\u00ebrmes kabllove t\u00eb zakonshme? E leht\u00eb, n\u00ebse kjo \u00ebsht\u00eb SHDSL\u2026\" src=\"\/wp-content\/uploads\/2020\/06\/bacad5ebbd0123972ea17c2625da6961.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Diagrami i gjendjeve t\u00eb koduesit, i llogaritur nga dekoderi Viterbi i marr\u00ebsit<\/i><\/p>\n<p>Por si si algorithm siguron q\u00eb \u00ebsht\u00eb i q\u00ebndruesh\u00ebm ndaj nd\u00ebrhyrjeve? N\u00ebse supozojm\u00eb se marr\u00ebsi pranoi t\u00eb dh\u00ebna me gabim, dekoderi do t\u00eb vazhdoj\u00eb t\u00eb llogaris\u00eb dy rrug\u00eb me metrik\u00eb gabimi 1. Rruga me metrik\u00eb 0 nuk do t\u00eb ekzistoj\u00eb m\u00eb. Por, p\u00ebrfundimi se cila rrug\u00eb \u00ebsht\u00eb e v\u00ebrtet\u00eb do t\u00eb b\u00ebhet m\u00eb von\u00eb, bazuar n\u00eb bitet e dyfishta q\u00eb do t\u00eb pranohen m\u00eb pas.<\/p>\n<p>Kur t\u00eb ndodh\u00eb nj\u00eb gabim i dyt\u00eb, do t\u00eb ket\u00eb disa rrug\u00eb me metrik\u00eb 2, por rruga e sakt\u00eb do t\u00eb identifikohet m\u00eb von\u00eb n\u00eb baz\u00eb t\u00eb metod\u00ebs s\u00eb maksimumit t\u00eb probabilitetit (dmth, metrik\u00ebs minimale).<\/p>\n<p><img decoding=\"async\" alt=\"Transferimi i t\u00eb dh\u00ebnave n\u00eb nj\u00eb distanc\u00eb deri n\u00eb 20 km p\u00ebrmes kabllove t\u00eb zakonshme? E leht\u00eb, n\u00ebse kjo \u00ebsht\u00eb SHDSL\u2026\" src=\"\/wp-content\/uploads\/2020\/06\/930eab928e06dd5c784a64591e45c061.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Diagrami i gjendjeve t\u00eb koduesit, i llogaritur nga dekoderi Viterbi, gjat\u00eb pranimit t\u00eb t\u00eb dh\u00ebnave me gabime. <\/i><\/p>\n<p>N\u00eb shembullin e p\u00ebrshkruar m\u00eb sip\u00ebr, \u00ebsht\u00eb shqyrtuar algoritmi i nj\u00eb sistemi 16-bit\u00ebsh (TC-PAM16), i cili siguron transmetim t\u00eb tre biteve t\u00eb informacionit t\u00eb dobish\u00ebm dhe nj\u00eb biti shtes\u00eb p\u00ebr mbrojtjen nga gabimet n\u00eb nj\u00eb simbol. N\u00eb TC-PAM16, shpejt\u00ebsia e transmetimit t\u00eb t\u00eb dh\u00ebnave arrin nga 192 deri n\u00eb 3840 kbit\/s. Duke rritur bitin n\u00eb 128 (sistemet moderne punojn\u00eb me TC-PAM128), n\u00eb \u00e7do simbol transmetohen gjasht\u00eb bite t\u00eb informacionit t\u00eb dobish\u00ebm, dhe shpejt\u00ebsia maksimale e arritshme varion nga 5696 kbit\/s deri n\u00eb 15,3 Mb\/s.<\/p>\n<p>P\u00ebrdorimi i modulimit analog-impuls (PAM) e lidh SHDSL me nj\u00eb varg standardesh t\u00eb njohura Ethernet, si\u00e7 jan\u00eb 1000BASE-T (PAM-5), 10GBASE-T (PAM-16) dhe standardi i ardhsh\u00ebm industral 10BASE-T1L (PAM-3) p\u00ebr vitin 2020.<\/p>\n<h3>SHDSL n\u00eb rrjetet Ethernet<\/h3>\n<p>\nEkzistojn\u00eb modem\u00eb SHDSL t\u00eb menaxhuar dhe t\u00eb pa menaxhuar, por n\u00eb nj\u00eb klasifikim t\u00eb till\u00eb ka pak t\u00eb ngjashme me ndarjen e zakonshme n\u00eb pajisje t\u00eb menaxhuara dhe t\u00eb pa menaxhuara, q\u00eb ka, p\u00ebr shembull, p\u00ebr switch-et Ethernet. Diferenca q\u00ebndron n\u00eb mjetet e konfigurimit dhe monitorimit. Modem\u00ebt e menaxhuar konfigurohen p\u00ebrmes nj\u00eb nd\u00ebrfaqeje web dhe mund t\u00eb diagnostikohen p\u00ebrmes SNMP, nd\u00ebrsa ata t\u00eb pa menaxhuar \u2013 me ndihm\u00ebn e softuerit shtes\u00eb p\u00ebrmes portit t\u00eb konsol\u00ebs (p\u00ebr Phoenix Contact \u00ebsht\u00eb nj\u00eb program falas PSI-CONF dhe nj\u00eb nd\u00ebrfaqe mini-USB). Ndryshe nga switch-et, modem\u00ebt e pa menaxhuar mund t\u00eb punojn\u00eb n\u00eb nj\u00eb rrjet me topologji ring.<\/p>\n<p>P\u00ebrve\u00e7 k\u00ebsaj, modem\u00ebt e menaxhuar dhe t\u00eb pa menaxhuar jan\u00eb absolutisht identik\u00eb, duke p\u00ebrfshir\u00eb funksionalitetin dhe mund\u00ebsin\u00eb p\u00ebr t\u00eb punuar sipas parimit Plug&amp;Play, pra pa ndonj\u00eb konfigurim paraprak.<\/p>\n<p>Modem\u00ebt mund t\u00eb ken\u00eb gjithashtu funksione mbrojt\u00ebse nga impulset e tepric\u00ebs me mund\u00ebsin\u00eb e diagnostikimit. Rjetet SHDSL mund t\u00eb formojn\u00eb segmente shum\u00eb t\u00eb gjata, dhe kabllot mund t\u00eb kalojn\u00eb n\u00eb vende ku mund t\u00eb ndodhin shp\u00ebrthime impulsi (diferenc\u00eb potenciali e induktuar, e shkaktuar nga shkarkimet rrufesh ose shkarkimet e shkurtra n\u00eb linjat e kabllove af\u00ebr). Tensioni i induktuar mund t\u00eb shkaktoj\u00eb kalimin e aktuale t\u00eb shkarkimit me vlera deri n\u00eb kiloamper. Prandaj, p\u00ebr t\u00eb mbrojtur pajisjet nga k\u00ebto fenomene, modem\u00ebt pajisen me SPI t\u00eb integruar n\u00eb form\u00ebn e nj\u00eb pllake q\u00eb mund t\u00eb z\u00ebvend\u00ebsohet n\u00ebse \u00ebsht\u00eb e nevojshme. Pik\u00ebrisht n\u00eb terminalin e k\u00ebsaj pllake lidhet linja SHDSL.<\/p>\n<h3>Topologjit\u00eb<\/h3>\n<p>\nMe SHDSL n\u00eb Ethernet \u00ebsht\u00eb e mundur t\u00eb nd\u00ebrtohen rrjete me \u00e7do topologji: pik\u00eb-pik\u00eb, linj\u00eb, ylli dhe unaz\u00eb. N\u00eb k\u00ebt\u00eb m\u00ebnyr\u00eb, n\u00eb var\u00ebsi t\u00eb tipit t\u00eb modem\u00ebt, p\u00ebr lidhjen mund t\u00eb p\u00ebrdoren si linja me 2 telash, ashtu edhe linja me 4 telash.<\/p>\n<p><img decoding=\"async\" alt=\"Transferimi i t\u00eb dh\u00ebnave n\u00eb nj\u00eb distanc\u00eb deri n\u00eb 20 km p\u00ebrmes kabllove t\u00eb zakonshme? E leht\u00eb, n\u00ebse kjo \u00ebsht\u00eb SHDSL\u2026\" src=\"\/wp-content\/uploads\/2020\/06\/2a1bea9e3b98c41adfb6ccea237eaf5a.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Topologjit\u00eb e rrjetit Ethernet n\u00eb baz\u00eb t\u00eb SHDSL<\/i><\/p>\n<p>Gjithashtu, \u00ebsht\u00eb e mundur t\u00eb nd\u00ebrtohen sisteme t\u00eb shp\u00ebrndara me topologji t\u00eb kombinuar. \u00c7do segment i rrjetit SHDSL mund t\u00eb p\u00ebrmbaj\u00eb deri n\u00eb 50 modeme dhe, duke marr\u00eb parasysh mund\u00ebsit\u00eb fizike t\u00eb teknologjis\u00eb (distanca midis modem\u00ebve n\u00eb 20 km), gjat\u00ebsia e segmentit mund t\u00eb arrij\u00eb deri n\u00eb 1000 km. <\/p>\n<p>N\u00ebse n\u00eb secil\u00ebn nga k\u00ebto segmente vendoset nj\u00eb modem i menaxhuesh\u00ebm, at\u00ebher\u00eb integriteti i segmentit mund t\u00eb diagnostikohet p\u00ebrmes SNMP. P\u00ebrve\u00e7 k\u00ebsaj, modem\u00ebt e menaxhuesh\u00ebm dhe ata t\u00eb pa menaxhuesh\u00ebm mb\u00ebshtesin teknologjin\u00eb VLAN, q\u00eb do t\u00eb thot\u00eb se lejojn\u00eb ndarjen e rrjetit n\u00eb subnet t\u00eb logjikshme. Po ashtu, pajisjet jan\u00eb t\u00eb afta t\u00eb punojn\u00eb me protokollet e transferimit t\u00eb t\u00eb dh\u00ebnave q\u00eb p\u00ebrdoren n\u00eb sistemet moderne t\u00eb automatizimit (Profinet, Ethernet\/IP, Modbus TCP etj.). <\/p>\n<p><img decoding=\"async\" alt=\"Transferimi i t\u00eb dh\u00ebnave n\u00eb nj\u00eb distanc\u00eb deri n\u00eb 20 km p\u00ebrmes kabllove t\u00eb zakonshme? E leht\u00eb, n\u00ebse kjo \u00ebsht\u00eb SHDSL\u2026\" src=\"\/wp-content\/uploads\/2020\/06\/6ee7348d35e5f3566b15edc7d54c2fed.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Rezervimi i kanaleve t\u00eb komunikimit me SHDSL<\/i><\/p>\n<p>SHDSL p\u00ebrdoret p\u00ebr krijimin e kanaleve t\u00eb rezervuara t\u00eb komunikimit n\u00eb rrjetin Ethernet, m\u00eb shpesh optik.<\/p>\n<h3>SHDSL dhe interfaci serial<\/h3>\n<p>\nModem\u00ebt SHDSL me interfaci serial lejojn\u00eb kalimin e kufizimeve n\u00eb distanc\u00eb, topologji dhe cil\u00ebsin\u00eb e conductor-it, t\u00eb cilat ekzistojn\u00eb p\u00ebr sistemet tradicionale t\u00eb kabllove q\u00eb bazohen n\u00eb transmetues dhe pranues asinkron\u00eb (UART): RS-232 \u2014 15 m, RS-422 dhe RS-485 \u2014 1200 m.<\/p>\n<p>Ekzistojn\u00eb modeme me interface t\u00eb radh\u00ebs (RS-232\/422\/485) si p\u00ebr aplikacione universale, ashtu edhe p\u00ebr ato t\u00eb specializuara (p\u00ebr shembull, p\u00ebr Profibus). T\u00eb gjitha k\u00ebto pajisje p\u00ebrfshihen n\u00eb kategorin\u00eb e \"pa menaxhuara\", prandaj konfigurohen dhe diagnostikohen p\u00ebrmes nj\u00eb programi specifik. <\/p>\n<h3>Topologjit\u00eb<\/h3>\n<p>\nN\u00eb rrjetet me interface t\u00eb radh\u00ebs, p\u00ebrmes SHDSL, \u00ebsht\u00eb e mundur t\u00eb nd\u00ebrtohen rrjete me topologji pik\u00eb-n\u00eb-pik\u00eb, linj\u00eb dhe yll. N\u00eb kuad\u00ebr t\u00eb topologjis\u00eb linjare, \u00ebsht\u00eb e mundur t\u00eb bashkohen deri n\u00eb 255 nyje n\u00eb nj\u00eb rrjet (p\u00ebr Profibus \u2014 30). <\/p>\n<p>N\u00eb sistemet e nd\u00ebrtuara ekskluzivisht me pajisje q\u00eb p\u00ebrdorin interfacin RS-485, nuk ka ndonj\u00eb kufizim mbi protokollin e t\u00eb dh\u00ebnave t\u00eb transmetimit, por topologjit\u00eb si linj\u00eb dhe yll jan\u00eb jo tipike p\u00ebr RS-232 dhe RS-422, prandaj funksionimi i pajisjeve p\u00ebrfundimtare n\u00eb rrjetin SHDSL me k\u00ebto topologji \u00ebsht\u00eb i mundur vet\u00ebm n\u00eb modin poluduplex. Nj\u00ebkoh\u00ebsisht, n\u00eb sistemet me RS-232 dhe RS-422, duhet t\u00eb sigurohet adresimi i pajisjeve n\u00eb nivelin e protokollit, gj\u00eb q\u00eb nuk \u00ebsht\u00eb tipike p\u00ebr interfeset q\u00eb p\u00ebrdoren m\u00eb shpesh n\u00eb rrjetet pik\u00eb-n\u00eb-pik\u00eb.<\/p>\n<p>Kur lidhni pajisje me tipa t\u00eb ndrysh\u00ebm interfeshesh p\u00ebrmes SHDSL, \u00ebsht\u00eb e nevojshme t\u00eb merren parasysh mungesa e nj\u00eb mekanizmi t\u00eb vet\u00ebm p\u00ebr vendosjen e lidhjes (duarshkundje) midis pajisjeve. Megjithat\u00eb, organizimi i shk\u00ebmbimit n\u00eb k\u00ebt\u00eb rast \u00ebsht\u00eb gjithsesi i mundur \u2014 p\u00ebr k\u00ebt\u00eb jan\u00eb t\u00eb nevojshme t\u00eb plot\u00ebsohen kushtet e m\u00ebposhtme:<\/p>\n<ul>\n<li>pajtim i lidhjes dhe menaxhimi i transferimit t\u00eb t\u00eb dh\u00ebnave duhet t\u00eb realizohen n\u00eb nivelin e nj\u00eb protokolli t\u00eb vet\u00ebm informacioni p\u00ebr transferimin e t\u00eb dh\u00ebnave;<\/li>\n<li>t\u00eb gjitha pajisjet p\u00ebrfundimtare duhet t\u00eb funksionojn\u00eb n\u00eb m\u00ebnyr\u00eb gjysm\u00eb-dupleks, e cila gjithashtu duhet t\u00eb mb\u00ebshtetet nga protokolli i informacionit.<\/li>\n<\/ul>\n<p>\nProtokolli m\u00eb i zakonsh\u00ebm p\u00ebr interfeshet asinkrone Modbus RTU lejon shmangien e t\u00eb gjitha kufizimeve t\u00eb p\u00ebrmendura dhe ndihmon n\u00eb nd\u00ebrtimin e nj\u00eb sistemi t\u00eb vet\u00ebm me tipe t\u00eb ndryshme interfeshesh.<\/p>\n<p><img decoding=\"async\" alt=\"Transferimi i t\u00eb dh\u00ebnave n\u00eb nj\u00eb distanc\u00eb deri n\u00eb 20 km p\u00ebrmes kabllove t\u00eb zakonshme? E leht\u00eb, n\u00ebse kjo \u00ebsht\u00eb SHDSL\u2026\" src=\"\/wp-content\/uploads\/2020\/06\/04796537365d2632fa71348deeaac32c.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Topologjit\u00eb e rrjetit me interfes t\u00eb vazhduesh\u00ebm mbi baz\u00ebn e SHDSL<\/i><\/p>\n<p>Kur p\u00ebrdoret RS-485 me dy tela n\u00eb pajisjet <noindex><a rel=\"nofollow\" href=\"http:\/\/www.phoenixcontact.ru\">Phoenix Contact<\/a><\/noindex> mund t\u00eb nd\u00ebrtohen struktura m\u00eb t\u00eb nd\u00ebrlikuara, duke lidhur modem\u00ebt p\u00ebrmes nj\u00eb shine n\u00eb rregullin DIN. N\u00eb k\u00ebt\u00eb shin\u00eb mund t\u00eb vendoset gjithashtu nj\u00eb burim energjie (n\u00eb k\u00ebt\u00eb rast, energjia p\u00ebr t\u00eb gjitha pajisjet sigurohet p\u00ebrmes shin\u00eb) dhe konvertues optik\u00eb nga seria PSI-MOS p\u00ebr t\u00eb krijuar nj\u00eb rrjet t\u00eb kombinuar. Nj\u00eb kusht i r\u00ebnd\u00ebsish\u00ebm p\u00ebr funksionimin e till\u00eb t\u00eb sistemit \u00ebsht\u00eb shpejt\u00ebsia e nj\u00ebjt\u00eb e t\u00eb gjith\u00eb transmetuesve dhe pranueseve.<\/p>\n<p><img decoding=\"async\" alt=\"Transferimi i t\u00eb dh\u00ebnave n\u00eb nj\u00eb distanc\u00eb deri n\u00eb 20 km p\u00ebrmes kabllove t\u00eb zakonshme? E leht\u00eb, n\u00ebse kjo \u00ebsht\u00eb SHDSL\u2026\" src=\"\/wp-content\/uploads\/2020\/06\/144b1eadd9d8866cb61ba51d0521b6e0.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Mund\u00ebsit\u00eb shtes\u00eb t\u00eb SHDSL n\u00eb rrjetin RS-485<\/i><\/p>\n<h3>Shembuj t\u00eb aplikimit<\/h3>\n<p>\nTeknologjia SHDSL p\u00ebrdoret aktivisht n\u00eb sh\u00ebrbimin komunal urban n\u00eb Gjermani. M\u00eb shum\u00eb se 50 kompani q\u00eb ofrojn\u00eb sh\u00ebrbime p\u00ebr sistemet komunale t\u00eb qytetit p\u00ebrdorin telat e vjet\u00ebr prej bakri p\u00ebr t\u00eb lidhur n\u00eb nj\u00eb rrjet objekte t\u00eb shp\u00ebrndara n\u00eb qytet. Sistemet e menaxhimit dhe matjes n\u00eb furnizimin me uj\u00eb, gaz dhe energji nd\u00ebrtohen kryesisht mbi SHDSL. Disa nga k\u00ebto qytete jan\u00eb: Ulm, Magdeburg, Ingolstadt, Bielefeld, Frankfurt-du-Oder dhe shum\u00eb t\u00eb tjera.<img decoding=\"async\" alt=\"Transferimi i t\u00eb dh\u00ebnave n\u00eb nj\u00eb distanc\u00eb deri n\u00eb 20 km p\u00ebrmes kabllove t\u00eb zakonshme? E leht\u00eb, n\u00ebse kjo \u00ebsht\u00eb SHDSL\u2026\" src=\"\/wp-content\/uploads\/2020\/06\/7262900dd9448dfa896d27dca45a3a96.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nSistemi m\u00eb i madh bazuar n\u00eb SHDSL u krijua n\u00eb qytetin L\u00fcbeck. Ky sistem ka nj\u00eb struktur\u00eb t\u00eb kombinuar mbi Ethernet optik dhe SHDSL, duke bashkuar 120 objekte t\u00eb ndara nga nj\u00ebra-tjetra dhe duke p\u00ebrdorur m\u00eb shum\u00eb se 50 modeme. <noindex><a rel=\"nofollow\" href=\"http:\/\/www.phoenixcontact.ru\">Phoenix Contact<\/a><\/noindex>. E gjith\u00eb rrjeti diagnostikohet p\u00ebrmes SNMP. Segmenti m\u00eb i gjat\u00eb nga komuna Kalkhorst deri n\u00eb aeroportin e L\u00fcbeck ka gjat\u00ebsi 39 km. Arsyeja pse kompania e porosit\u00ebsit zgjodhi SHDSL ishte se implementimi i projektit t\u00ebr\u00ebsisht n\u00eb fibra ishte ekonomikisht i paivler\u00ebsuar, duke marr\u00eb parasysh pranin\u00eb e kabllove t\u00eb vjet\u00ebr t\u00eb bakrit. <\/p>\n<p><img decoding=\"async\" alt=\"Transferimi i t\u00eb dh\u00ebnave n\u00eb nj\u00eb distanc\u00eb deri n\u00eb 20 km p\u00ebrmes kabllove t\u00eb zakonshme? E leht\u00eb, n\u00ebse kjo \u00ebsht\u00eb SHDSL\u2026\" src=\"\/wp-content\/uploads\/2020\/06\/a8c6bd958128ea7b097b42dfe49f4c0c.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Transferimi i t\u00eb dh\u00ebnave p\u00ebrmes unaz\u00ebs kontakti<\/i><\/p>\n<p>Nj\u00eb shembull interesant \u00ebsht\u00eb transferimi i t\u00eb dh\u00ebnave midis objekteve n\u00eb l\u00ebvizje, si\u00e7 \u00ebsht\u00eb ajo q\u00eb ndodh n\u00eb gjeneratoret e er\u00ebs ose n\u00eb makinat industriale t\u00eb m\u00ebdha. Nj\u00eb sistem i till\u00eb p\u00ebrdoret p\u00ebr shk\u00ebmbimin e informacionit midis kontrolluesve t\u00eb vendosur n\u00eb rotorin dhe statorin e instalimeve. N\u00eb k\u00ebt\u00eb rast, p\u00ebr transferimin e t\u00eb dh\u00ebnave p\u00ebrdoret kontakti i l\u00ebvizsh\u00ebm p\u00ebrmes unaz\u00ebs kontakti. Shembuj t\u00eb till\u00eb tregojn\u00eb se nuk \u00ebsht\u00eb e nevojshme t\u00eb ket\u00eb nj\u00eb kontakt statik p\u00ebr transferimin e t\u00eb dh\u00ebnave p\u00ebrmes SHDSL.<\/p>\n<h3>Krahasimi me teknologji t\u00eb tjera<\/h3>\n<p><\/p>\n<h4>SHDSL vs GSM<\/h4>\n<p>\nKur krahasohet SHDSL me sistemet e transmetimit t\u00eb t\u00eb dh\u00ebnave t\u00eb bazuara n\u00eb GSM (3G\/4G), avantazhi i DSL \u00ebsht\u00eb mungesa e shpenzimeve operacionale q\u00eb lidhen me pages\u00ebn e rregullt p\u00ebr operatorin p\u00ebr aksesin n\u00eb rrjetin mobil. Me SHDSL ne nuk jemi t\u00eb varur nga zona e mbulimit, cil\u00ebsia dhe besueshm\u00ebria e lidhjes mobile n\u00eb objektet industriale, duke p\u00ebrfshir\u00eb q\u00ebndrueshm\u00ebrin\u00eb ndaj ndotjeve elektromagnetike. N\u00eb SHDSL nuk ka nevoj\u00eb p\u00ebr konfigurimin e pajisjeve, \u00e7ka e p\u00ebrshpejton aktivizimin e objektit. Rrjetet pa tel karakterizohen nga vonesa t\u00eb m\u00ebdha n\u00eb transmetimin e t\u00eb dh\u00ebnave dhe v\u00ebshtir\u00ebsi me transmetimin e t\u00eb dh\u00ebnave q\u00eb p\u00ebrdorin trafik multicast (Profinet, Ethernet IP). <\/p>\n<p>Avantazhi i SHDSL \u00ebsht\u00eb siguria informative p\u00ebr shkak t\u00eb munges\u00ebs s\u00eb nevoj\u00ebs p\u00ebr t\u00eb transmetuar t\u00eb dh\u00ebna p\u00ebrmes Internetit dhe nevoj\u00ebs p\u00ebr konfigurimin e lidhjeve VPN p\u00ebr k\u00ebt\u00eb.<\/p>\n<h4>SHDSL vs Wi-Fi<\/h4>\n<p>\nShum\u00eb nga ato q\u00eb jan\u00eb th\u00ebn\u00eb p\u00ebr GSM mund t'i p\u00ebrkasin gjithashtu Wi-Fi industrial. Kund\u00ebr Wi-Fi \u00ebsht\u00eb q\u00ebndresa e ul\u00ebt ndaj nd\u00ebrhyrjeve, distanca e kufizuar e transmetimit t\u00eb t\u00eb dh\u00ebnave, var\u00ebsia nga topologjia e terrenit dhe vonesat n\u00eb transmetimin e t\u00eb dh\u00ebnave. Nj\u00eb nga disavantazhet kryesore \u00ebsht\u00eb siguria informacionit t\u00eb rrjeteve Wi-Fi, pasi \u00e7do person ka akses n\u00eb mjedisin e transmetimit t\u00eb t\u00eb dh\u00ebnave. Me Wi-Fi tashm\u00eb \u00ebsht\u00eb e mundur t\u00eb transmetohen t\u00eb dh\u00ebna Profinet ose Ethernet IP, gj\u00eb q\u00eb do t\u00eb ishte e v\u00ebshtir\u00eb p\u00ebr GSM.<\/p>\n<h4>SHDSL vs fibra optike<\/h4>\n<p>\nFibra optike n\u00eb shumic\u00ebn e rasteve ka shum\u00eb avantazhe mbi SHDSL, por n\u00eb disa aplikacione, SHDSL lejon kursimin e koh\u00ebs dhe burimeve n\u00eb vendosjen dhe saldimin e kabllove optike, duke shkurtuar koh\u00ebn p\u00ebr v\u00ebnien n\u00eb funksion t\u00eb objektit. P\u00ebr SHDSL nuk k\u00ebrkohen konektor\u00eb t\u00eb ve\u00e7ant\u00eb, pasi kablli i komunikimit thjesht lidhet n\u00eb terminalin e modemit. P\u00ebr shkak t\u00eb pronave mekanike t\u00eb kabllove optik\u00eb, p\u00ebrdorimi i tyre \u00ebsht\u00eb i kufizuar n\u00eb aplikacione q\u00eb lidhen me transmetimin e informacionit nd\u00ebrmjet objekteve n\u00eb l\u00ebvizje, ku kan\u00eb fituar m\u00eb shum\u00eb p\u00ebrhapje drejtuesit e bakrit.<br \/>\n<br \/>Burimi: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/phoenix_contact\/blog\/506936\/\">habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041d\u0435\u0441\u043c\u043e\u0442\u0440\u044f \u043d\u0430 \u043f\u043e\u0432\u0441\u0435\u043c\u0435\u0441\u0442\u043d\u043e\u0435 \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435 \u0441\u0435\u0442\u0435\u0439 Ethernet, \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u0438 \u0441\u0432\u044f\u0437\u0438 \u043d\u0430 \u043e\u0441\u043d\u043e\u0432\u0435 DSL \u043d\u0435 \u0442\u0435\u0440\u044f\u044e\u0442 \u0441\u0432\u043e\u0435\u0439 \u0430\u043a\u0442\u0443\u0430\u043b\u044c\u043d\u043e\u0441\u0442\u0438 \u0438 \u043f\u043e \u0441\u0435\u0439 \u0434\u0435\u043d\u044c. \u0414\u043e \u0441\u0438\u0445 \u043f\u043e\u0440 DSL \u043c\u043e\u0436\u043d\u043e \u0432\u0441\u0442\u0440\u0435\u0442\u0438\u0442\u044c \u0432 \u0441\u0435\u0442\u044f\u0445 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0439 \u043c\u0438\u043b\u0438 \u0434\u043b\u044f \u043f\u043e\u0434\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f \u0430\u0431\u043e\u043d\u0435\u043d\u0442\u0441\u043a\u043e\u0433\u043e \u043e\u0431\u043e\u0440\u0443\u0434\u043e\u0432\u0430\u043d\u0438\u044f \u043a \u0441\u0435\u0442\u044f\u043c \u0418\u043d\u0442\u0435\u0440\u043d\u0435\u0442-\u043f\u0440\u043e\u0432\u0430\u0439\u0434\u0435\u0440\u0430, \u0430 \u0432 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0435 \u0432\u0440\u0435\u043c\u044f \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u044f \u0432\u0441\u0435 \u0447\u0430\u0449\u0435 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0441\u044f \u043f\u0440\u0438 \u043f\u043e\u0441\u0442\u0440\u043e\u0435\u043d\u0438\u0438 \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u044b\u0445 \u0441\u0435\u0442\u0435\u0439, \u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u0432 \u043f\u0440\u043e\u043c\u044b\u0448\u043b\u0435\u043d\u043d\u044b\u0445 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f\u0445, \u0433\u0434\u0435 DSL \u0432\u044b\u0441\u0442\u0443\u043f\u0430\u0435\u0442 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":85742,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-85741","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041d\u0435\u0441\u043c\u043e\u0442\u0440\u044f \u043d\u0430 \u043f\u043e\u0432\u0441\u0435\u043c\u0435\u0441\u0442\u043d\u043e\u0435 \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435 \u0441\u0435\u0442\u0435\u0439 Ethernet, \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u0438 \u0441\u0432\u044f\u0437\u0438 \u043d\u0430 \u043e\u0441\u043d\u043e\u0432\u0435 DSL \u043d\u0435 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