{"id":71069,"date":"2020-02-23T22:07:58","date_gmt":"2020-02-23T19:07:58","guid":{"rendered":"https:\/\/prohoster.info\/blog\/chetvertushka-ethernet-a-staraya-skorost-novye-vozmozhnosti"},"modified":"2020-03-03T16:14:34","modified_gmt":"2020-03-03T13:14:34","slug":"chetvertushka-ethernet-a-staraya-skorost-novye-vozmozhnosti","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/administrirovanie\/chetvertushka-ethernet-a-staraya-skorost-novye-vozmozhnosti","title":{"rendered":"Kat\u00ebrth\u00ebni Ethernet: shpejt\u00ebsi e vjet\u00ebr, mund\u00ebsi t\u00eb reja","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><img decoding=\"async\" alt=\"Kat\u00ebrth\u00ebni Ethernet: shpejt\u00ebsi e vjet\u00ebr, mund\u00ebsi t\u00eb reja\" src=\"\/wp-content\/uploads\/2020\/02\/d10d96c9523f873599b9e858dfb50ce7.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nM\u00eb 5 shkurt t\u00eb k\u00ebtij viti u miratua nj\u00eb standard i ri p\u00ebr Ethernet me 10 megabit\u00eb. Po, e keni lexuar sakt\u00eb: dhjet\u00eb megabit\u00eb n\u00eb sekond\u00eb.<\/p>\n<p>P\u00ebr \u00e7far\u00eb i nevojitet nj\u00eb shpejt\u00ebsi kaq \"t\u00eb vog\u00ebl\" n\u00eb shekullin XXI? P\u00ebr t\u00eb z\u00ebvend\u00ebsuar at\u00eb kaos q\u00eb fshihet pas emrit t\u00eb gj\u00ebr\u00eb \"busi i fush\u00ebs\" \u2014 Profibus, Modbus, CC-Link, CAN, FlexRay, HART, etj. Jan\u00eb shum\u00eb, nuk jan\u00eb t\u00eb p\u00ebrshtatsh\u00ebm me nj\u00ebri-tjetrin dhe jan\u00eb relativisht t\u00eb komplikuar p\u00ebr t\u2019u konfiguruar. Dhe d\u00ebshirojm\u00eb thjesht t\u00eb lidhim nj\u00eb kabllo n\u00eb switch dhe gjith\u00e7ka \u00ebsht\u00eb gati. Si me Ethernet normal.<br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\nDhe s\u00eb shpejti kjo do t\u00eb jet\u00eb e mundur! Njihuni me: \"802.3cg-2019 \u2014 Standardi IEEE p\u00ebr Ethernet \u2014 Amendamenti 5: Specifikat dhe Parametrat e Menaxhimit t\u00eb N\u00ebnkat\u00ebsit Fizik p\u00ebr Operacionin 10 Mb\/s dhe Shp\u00ebrndarjen e Energjis\u00eb t\u00eb Asociuar p\u00ebrmes nj\u00eb \u00c7ifti t\u00eb Balancuar t\u00eb Nd\u00ebrvepruesve.\" <\/p>\n<p>\u00c7far\u00eb e b\u00ebn k\u00ebt\u00eb Ethernet t\u00eb ri t\u00ebrheq\u00ebs? Para se gjithash - ai punon me nj\u00eb \u00e7ift t\u00eb nd\u00ebrlidhur, jo me kat\u00ebr. Prandaj, ka m\u00eb pak konektor\u00eb dhe kabllot jan\u00eb m\u00eb t\u00eb holla. Dhe \u00ebsht\u00eb e mundur t\u00eb p\u00ebrdoret \u00e7ifti i nd\u00ebrlidhur q\u00eb tashm\u00eb \u00ebsht\u00eb instaluar p\u00ebr sensor\u00ebt dhe mekanizmat e ekzekutimit.<\/p>\n<p>Mund t\u00eb kund\u00ebrshtoni se Ethernet punon deri n\u00eb 100 metra, nd\u00ebrsa sensor\u00ebt jan\u00eb shum\u00eb m\u00eb t\u00eb larg\u00ebt. N\u00eb t\u00eb v\u00ebrtet\u00eb, kjo ishte nj\u00eb problem m\u00eb par\u00eb. Por 802.3cg punon n\u00eb nj\u00eb distanc\u00eb deri n\u00eb 1 km! Me nj\u00eb \u00e7ift! Jo keq? <\/p>\n<p>N\u00eb t\u00eb v\u00ebrtet\u00eb, akoma m\u00eb mir\u00eb: p\u00ebrmes k\u00ebtij \u00e7ifti mund t\u00eb d\u00ebrgohet edhe energjia elektrike. Nga ky pik\u00eb do t\u00eb fillojm\u00eb.<\/p>\n<h3>IEEE 802.3bu Energjia mbi Linjat e t\u00eb Dh\u00ebnave (PoDL)<\/h3>\n<p>\nMendoj se shum\u00eb prej jush kan\u00eb d\u00ebgjuar p\u00ebr PoE (Energjia mbi Ethernet) dhe din\u00eb se p\u00ebr t\u00eb transmetuar energji nevojiten 2 \u00e7ifte kabllosh. Hyrja\/dalja e energjis\u00eb b\u00ebhet n\u00eb pik\u00ebt e mesme t\u00eb transformator\u00ebve t\u00eb \u00e7do \u00e7ifti. Duke p\u00ebrdorur nj\u00eb \u00e7ift, \u00ebsht\u00eb e pamundur t\u00eb b\u00ebhet kjo. Prandaj, duhej t\u00eb b\u00ebhej ndryshe. Si \u00ebsht\u00eb treguar n\u00eb figur\u00ebn n\u00eb fund. P\u00ebr shembull, \u00ebsht\u00eb shtuar edhe PoE klasik.<\/p>\n<p><img decoding=\"async\" alt=\"Kat\u00ebrth\u00ebni Ethernet: shpejt\u00ebsi e vjet\u00ebr, mund\u00ebsi t\u00eb reja\" src=\"\/wp-content\/uploads\/2020\/02\/bb89378da53efb0a9bbf0a9edf583155.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nK\u00ebtu:<br \/>\nPSE \u2013 equipment q\u00eb siguron energji (burimi i energjis\u00eb)<br \/>\nPD \u2013 pajisje e fuqizuar (pajisja n\u00eb an\u00ebn tjet\u00ebr q\u00eb konsumon energji elektrike)<\/p>\n<p>Fillimisht 802.3bu kishte 10 klasa energjie:<\/p>\n<p><img decoding=\"async\" alt=\"Kat\u00ebrth\u00ebni Ethernet: shpejt\u00ebsi e vjet\u00ebr, mund\u00ebsi t\u00eb reja\" src=\"\/wp-content\/uploads\/2020\/02\/5d089748498a37f5ae75cc0b8629dc42.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nMe ngjyr\u00eb jan\u00eb dalluar tre grada t\u00eb p\u00ebrkat\u00ebsis\u00eb s\u00eb tensionit t\u00eb burimit: 12, 24 dhe 48V.<\/p>\n<p>Shkurtimet:<br \/>\nVpse \u2014 tensioni i burimit t\u00eb energjis\u00eb, V<br \/>\nVpd min \u2014 tensioni minimal n\u00eb PD, V<br \/>\nI max \u2014 aktuali maksimal n\u00eb linj\u00eb, A<br \/>\nPpd max \u2014 fuqia maksimale e konsumuar nga PD, W<\/p>\n<p>Me ardhjen e protokollit 802.3cg jan\u00eb shtuar edhe 6 klasa t\u00eb tjera:<\/p>\n<p><img decoding=\"async\" alt=\"Kat\u00ebrth\u00ebni Ethernet: shpejt\u00ebsi e vjet\u00ebr, mund\u00ebsi t\u00eb reja\" src=\"\/wp-content\/uploads\/2020\/02\/cb2677254d132ad27c4daf06489795ea.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nSigurisht, me nj\u00eb diversitet t\u00eb till\u00eb, PSE dhe PD duhet t\u00eb pajtohen p\u00ebr klas\u00ebn e energjis\u00eb p\u00ebrpara se t\u00eb jepet tensioni i plot\u00eb. Kjo b\u00ebhet p\u00ebrmes SCCP (Serial Communications Classification Protocol). Ky \u00ebsht\u00eb nj\u00eb protokoll me shpejt\u00ebsi t\u00eb ul\u00ebt (333 bit\/s), i bazuar n\u00eb 1-Wire. Ai funksionon vet\u00ebm kur nuk ka energji t\u00eb madhe t\u00eb aplikuar n\u00eb linj\u00eb (p\u00ebrfshir\u00eb n\u00eb modalitetin e gjumit).<\/p>\n<p>N\u00eb diagramin e bllokut tregohet se si realizohet furnizimi me energji:<\/p>\n<ul>\n<li>vihet nj\u00eb rrym\u00eb prej 10mA dhe kontrollohet prania e stabilizatorit n\u00eb 4V n\u00eb an\u00ebn tjet\u00ebr<\/li>\n<li>realizohet pajtimi i klas\u00ebs s\u00eb energjis\u00eb<\/li>\n<li>vihet energjia e madhe<\/li>\n<li>n\u00ebse konsumimi bie n\u00ebn 10mA \u2013 aktivizohet modaliteti i gjumit (ofrimi i energjis\u00eb s\u00eb pritjes 3.3V)<\/li>\n<li>n\u00ebse konsumimi kalon 1mA \u2013 ndodh dalja nga modaliteti i gjumit<\/li>\n<\/ul>\n<p>\n<img decoding=\"async\" alt=\"Kat\u00ebrth\u00ebni Ethernet: shpejt\u00ebsi e vjet\u00ebr, mund\u00ebsi t\u00eb reja\" src=\"\/wp-content\/uploads\/2020\/02\/ac282970ea69804211da01c9c6a384b8.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nPajtimi i klas\u00ebs s\u00eb energjis\u00eb nuk \u00ebsht\u00eb e nevojshme n\u00ebse ajo \u00ebsht\u00eb e njohur paraprakisht. Ky variant quhet Modaliteti i Nism\u00ebs s\u00eb Shpejt\u00eb. P\u00ebrdoret, p\u00ebr shembull, n\u00eb automobilat, pasi aty nuk ka nevoj\u00eb p\u00ebr t\u00eb ndryshuar konfigurimin e pajisjeve t\u00eb lidhura.<\/p>\n<p>Iniciimin e kalimit n\u00eb modalitetin e gjumit mund ta b\u00ebj\u00eb si PSE ashtu edhe PD.<\/p>\n<p>Tani, le t\u00eb kalojm\u00eb n\u00eb p\u00ebrshkrimin e transferimit t\u00eb t\u00eb dh\u00ebnave. Atje gjithashtu \u00ebsht\u00eb interesante: n\u00eb standard p\u00ebrcaktohen dy modalitete operimi \u2013 p\u00ebr distanca t\u00eb m\u00ebdha dhe p\u00ebr distanca t\u00eb vogla. <\/p>\n<h3>10BASE-T1L<\/h3>\n<p>\nKy \u00ebsht\u00eb nj\u00eb variant p\u00ebr distanca t\u00eb m\u00ebdha (long reach). Karakteristikat kryesore jan\u00eb si vijon:<\/p>\n<ul>\n<li>distanca e veprimit \u2013 deri n\u00eb 1km<\/li>\n<li>prerje 18AWG (0.8mm2)<\/li>\n<li>deri n\u00eb 10 lidhje nd\u00ebrmjet\u00ebs dhe dy p\u00ebrfundimtare<\/li>\n<li>modaliteti i funksionimit pik\u00eb-n\u00eb-pik\u00eb<\/li>\n<li>dupleks i plot\u00eb<\/li>\n<li>shpejt\u00ebsia simbolike 7.5Mbaud<\/li>\n<li>modulimi PAM-3, kodimi 4B3T<\/li>\n<li>sinjali me nj\u00eb amplitud\u00eb prej 1V (1Vpp) ose 2.4V<\/li>\n<li>mb\u00ebshtetje p\u00ebr Ethernetin e Efikasitetit t\u00eb Energjis\u00eb (\"quiet\/refresh\" EEE)<\/li>\n<\/ul>\n<p>\n\u00cbsht\u00eb e qart\u00eb se ky variant \u00ebsht\u00eb i destinuar p\u00ebr p\u00ebrdorim industrial, sisteme kontrolli akses, automatizimi i nd\u00ebrtesave, ashensor\u00eb. P\u00ebr t\u00eb menaxhuar chillers, kondicioner\u00eb, ventilator\u00eb t\u00eb vendosur n\u00eb \u00e7ati. Ose termocentralet dhe pompat q\u00eb gjenden n\u00eb ambiente teknike. Pra, ka shum\u00eb aplikime p\u00ebrve\u00e7 industris\u00eb. Pa p\u00ebrmendur Internetin e Gj\u00ebrave (IoT).<\/p>\n<p>Duhet t\u00eb p\u00ebrmendet se 10BASE-T1 \u00ebsht\u00eb vet\u00ebm nj\u00eb nga standardet e Ethernetit me Nj\u00eb \u00c7ift (SPE). Ka gjithashtu 100BASE-T1 (802.3bw) dhe 1000BASE-T1 (802.3bp). Megjithat\u00eb, ato jan\u00eb zhvilluar p\u00ebr aplikime automobilistike, prandaj atje distanca \u00ebsht\u00eb vet\u00ebm 15 (UTP) ose 40 metra (STP). Megjithat\u00eb, n\u00eb planet ekziston tashm\u00eb edhe 100BASE-T1L p\u00ebr distanca t\u00eb gjata. Pra, n\u00eb t\u00eb ardhmen do t\u00eb shtohet auto-pajtimi i shpejt\u00ebsis\u00eb. <\/p>\n<p>Nd\u00ebrkoh\u00eb q\u00eb miratimi nuk p\u00ebrdoret - \u00ebsht\u00eb shpallur \"starti i shpejt\u00eb\" i nd\u00ebrfaqes: m\u00eb pak se 100ms nga aktivizimi deri n\u00eb fillimin e shk\u00ebmbimit t\u00eb t\u00eb dh\u00ebnave.<\/p>\n<p>Nj\u00eb mund\u00ebsi tjet\u00ebr (jo e detyrueshme) \u00ebsht\u00eb rritja e amplitud\u00ebs s\u00eb transmetimit nga 1 n\u00eb 2.4V p\u00ebr t\u00eb p\u00ebrmir\u00ebsuar raportin sinjal\/zhurm\u00eb, p\u00ebr t\u00eb reduktuar numrin e gabimeve dhe p\u00ebr t'u p\u00ebrballur me pengesat industriale.<\/p>\n<p>Sigurisht, ka edhe EEE. Ky \u00ebsht\u00eb nj\u00eb m\u00ebnyr\u00eb p\u00ebr t\u00eb kursyer energjin\u00eb elektrike duke shky\u00e7ur transmetuesin n\u00ebse nuk ka t\u00eb dh\u00ebna p\u00ebr transmetim n\u00eb at\u00eb moment. N\u00eb diagramin e treguar, kjo duket k\u00ebshtu:<br \/>\n<img decoding=\"async\" alt=\"Kat\u00ebrth\u00ebni Ethernet: shpejt\u00ebsi e vjet\u00ebr, mund\u00ebsi t\u00eb reja\" src=\"\/wp-content\/uploads\/2020\/02\/888029d8582e22cb5c5bb39d5f485aa9.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nNuk ka t\u00eb dh\u00ebna - d\u00ebrgojm\u00eb nj\u00eb mesazh \"kam shkuar p\u00ebr t\u00eb fjetur\" dhe shky\u00e7emi. Rr\u00ebzimi ndodh her\u00eb pas here dhe d\u00ebrgojm\u00eb nj\u00eb mesazh \"jam ende k\u00ebtu\". Kur ka t\u00eb dh\u00ebna, pala tjet\u00ebr merr nj\u00eb paralajm\u00ebrim \"po zgjohem\" dhe fillon transmetimi. Kjo do t\u00eb thot\u00eb se vet\u00ebm marr\u00ebsit punojn\u00eb vazhdimisht.<\/p>\n<p>Tani le t\u00eb shohim se \u00e7far\u00eb \u00ebsht\u00eb krijuar me opsionin e dyt\u00eb t\u00eb standardit.<\/p>\n<h3>10BASE-T1S<\/h3>\n<p>\nQ\u00eb t\u00eb kuptohet nga letra e fundit, ky \u00ebsht\u00eb nj\u00eb protokoll p\u00ebr distanca t\u00eb shkurtra (short reach). Por p\u00ebrse \u00ebsht\u00eb e nevojshme, kur edhe T1L funksionon n\u00eb distanca t\u00eb shkurtra? Le t\u00eb lexojm\u00eb karakteristikat:<\/p>\n<ul>\n<li>distanca e veprimit deri n\u00eb 15m n\u00eb modalitetin pik\u00eb-pik\u00eb<\/li>\n<li>dupleks ose poludupleks<\/li>\n<li>t\u00eb dh\u00ebnat 24-26AWG (0.2-0.13mm2)<\/li>\n<li>shpejt\u00ebsia simbolike 12.5Mbaud<\/li>\n<li>DME, kodimi 4B5B<\/li>\n<li>sinjali me amplitud\u00eb 1V (1Vpp)<\/li>\n<li>deri n\u00eb 4 lidh\u00ebse nd\u00ebrmjet\u00ebse (dhe dy n\u00eb skajet)<\/li>\n<li>nuk ka mb\u00ebshtetje p\u00ebr EEE<\/li>\n<\/ul>\n<p>\nDuket se nuk ka asgj\u00eb t\u00eb ve\u00e7ant\u00eb. Por p\u00ebrse \u00ebsht\u00eb e nevojshme? Kjo \u00ebsht\u00eb ajo:<\/p>\n<ul>\n<li>distanca e veprimit deri n\u00eb 25m n\u00eb modalitetin multipoint (deri n\u00eb 8 nyje)<\/li>\n<\/ul>\n<p>\nDhe kjo:<\/p>\n<ul>\n<li>modaliteti i funksionimit me parandalimin e p\u00ebrplasjeve PLCA RS (Sublayer e Sermeti p\u00ebr Parandalimin e P\u00ebrs\u00ebritjes n\u00eb Nivelin PHY)<\/li>\n<\/ul>\n<p>\nDhe kjo tashm\u00eb \u00ebsht\u00eb shum\u00eb m\u00eb interesante, apo jo? Sepse ndihmon p\u00ebr t\u00eb reduktuar ndjesh\u00ebm numrin e kabllove n\u00eb dyert e menaxhimit, makinave, robot\u00ebve, makinave. Dhe tashm\u00eb ka propozime p\u00ebr ta p\u00ebrdorur si z\u00ebvend\u00ebsim p\u00ebr I2C n\u00eb <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/sq\/server\/dts-gdansk\/\"   title=\"sistemet\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"4502\">sistemet<\/a>, switch-e dhe elektronik\u00eb t\u00eb tjera.<\/p>\n<p><img decoding=\"async\" alt=\"Kat\u00ebrth\u00ebni Ethernet: shpejt\u00ebsi e vjet\u00ebr, mund\u00ebsi t\u00eb reja\" src=\"\/wp-content\/uploads\/2020\/02\/98614d57cc671efc36bee4d3251f8e60.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nPor, modaliteti multipoint ka disavantazhe. Nj\u00ebri prej tyre \u00ebsht\u00eb mjedisi i p\u00ebrbashk\u00ebt i transmetimit t\u00eb t\u00eb dh\u00ebnave. Sigurisht, p\u00ebrplasjet zgjidhen me ndihm\u00ebn e CSMA\/CD. Por nuk dihet se cila do t\u00eb jet\u00eb vonesa n\u00eb k\u00ebt\u00eb rast. Dhe p\u00ebr disa aplikacione \u00ebsht\u00eb kritik. Prandaj n\u00eb standardin e ri u shtua nj\u00eb modalitet i ve\u00e7ant\u00eb multipoint me PLCA RS (shih seksionin tjet\u00ebr).<\/p>\n<p>Disavantazhi i dyt\u00eb \u00ebsht\u00eb se n\u00eb multipoint nuk funksionon PoDL. Kjo do t\u00eb thot\u00eb se energjia do t\u00eb duhet t\u00eb furnizohet p\u00ebrmes nj\u00eb kabulli t\u00eb ve\u00e7ant\u00eb ose t\u00eb merret diku n\u00eb vend. <\/p>\n<p>Megjithat\u00eb, n\u00eb modin point-to-point, PoDL funksionon edhe n\u00eb T1S.<\/p>\n<h3>PLCA RS<\/h3>\n<p>\nKy mod funksionon si n\u00eb vijim:<\/p>\n<ul>\n<li>nodos ndajn\u00eb midis tyre identifikuesit, nodi me ID=0 b\u00ebhet koordinatori<\/li>\n<li>koordinatori l\u00ebshon n\u00eb rrjet sinjalin BEACON, q\u00eb do t\u00eb thot\u00eb fillimi i nj\u00eb cikli t\u00eb ri t\u00eb transmetimit dhe transmeton paket\u00ebn e tij t\u00eb t\u00eb dh\u00ebnave<\/li>\n<li>pas transmetimit t\u00eb paket\u00ebs s\u00eb t\u00eb dh\u00ebnave, radhitja p\u00ebr transmetim kalon te nodi tjet\u00ebr<\/li>\n<li>n\u00ebse brenda koh\u00ebs s\u00eb nevojshme p\u00ebr transmetimin e 20 bit\u00ebve nodi nuk ka filluar transmetimin, radhitja kalon te nodi tjet\u00ebr<\/li>\n<li>kur t\u00eb gjith\u00eb nodet kan\u00eb transmetuar t\u00eb dh\u00ebnat (ose kan\u00eb kaluar radh\u00ebn e tyre), koordinatori fillon nj\u00eb cik\u00ebl t\u00eb ri<\/li>\n<\/ul>\n<p>\nN\u00eb p\u00ebrgjith\u00ebsi, kjo i ngjan TDMA-s. Por me at\u00eb ve\u00e7ori q\u00eb nodi nuk e p\u00ebrdor dritaren e tij temporale, n\u00ebse nuk ka \u00e7far\u00eb t\u00eb transmetoj\u00eb. Dhe madh\u00ebsia e dritares nuk \u00ebsht\u00eb e p\u00ebrcaktuar ashp\u00ebr, sepse varet nga madh\u00ebsia e paket\u00ebs s\u00eb t\u00eb dh\u00ebnave q\u00eb transmetohet nga nodi. Dhe gjith\u00eb kjo funksionon mbi kornizat standarde Ethernet 802.3 (PLCA RS nuk \u00ebsht\u00eb e obligueshme, k\u00ebshtu q\u00eb duhet t\u00eb ket\u00eb p\u00ebrputhshm\u00ebri).<\/p>\n<p>Rezultati i p\u00ebrdorimit t\u00eb PLCA-s \u2013 posht\u00eb n\u00eb grafikat. E para \u2013 vonesa n\u00eb var\u00ebsi t\u00eb ngarkes\u00ebs, e dyta \u2013 kapaciteti n\u00eb var\u00ebsi t\u00eb numrit t\u00eb nod\u00ebve transmetues. \u00cbsht\u00eb e dukshme se vonesa \u00ebsht\u00eb b\u00ebr\u00eb shum\u00eb m\u00eb e parashikueshme. Dhe n\u00eb rastin m\u00eb t\u00eb keq \u00ebsht\u00eb dy rend pas m\u00eb pak se n\u00eb rastin m\u00eb t\u00eb keq t\u00eb CSMA\/CD:<\/p>\n<p><img decoding=\"async\" alt=\"Kat\u00ebrth\u00ebni Ethernet: shpejt\u00ebsi e vjet\u00ebr, mund\u00ebsi t\u00eb reja\" src=\"\/wp-content\/uploads\/2020\/02\/62bd8e271e7d882095281b37f63d8426.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nDhe kapaciteti i kanalit n\u00eb rastin e PLCA-s \u00ebsht\u00eb m\u00eb i lart\u00eb, pasi nuk shpenzohet p\u00ebr zgjidhjen e kolizionit:<\/p>\n<p><img decoding=\"async\" alt=\"Kat\u00ebrth\u00ebni Ethernet: shpejt\u00ebsi e vjet\u00ebr, mund\u00ebsi t\u00eb reja\" src=\"\/wp-content\/uploads\/2020\/02\/b66a9bb8836a6d8d9aa0b21d1136f186.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h3>Konektor\u00ebt<\/h3>\n<p>\nFillimisht zgjodh\u00ebm nga 6 variacione t\u00eb konektor\u00ebve, t\u00eb propozuara nga kompani t\u00eb ndryshme. Si rezultat, u ndal\u00ebm n\u00eb k\u00ebto dy variante: <\/p>\n<p><img decoding=\"async\" alt=\"Kat\u00ebrth\u00ebni Ethernet: shpejt\u00ebsi e vjet\u00ebr, mund\u00ebsi t\u00eb reja\" src=\"\/wp-content\/uploads\/2020\/02\/0edb52b01e5d082069a10d46a57cd540.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nP\u00ebr kushte t\u00eb zakonshme p\u00ebrdorimi u zgjodh konektori LC IEC 63171-1 nga kompania CommScope. <\/p>\n<p><img decoding=\"async\" alt=\"Kat\u00ebrth\u00ebni Ethernet: shpejt\u00ebsi e vjet\u00ebr, mund\u00ebsi t\u00eb reja\" src=\"\/wp-content\/uploads\/2020\/02\/a4b8c60e1ffbb0008973a0c5fe1d8dca.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nP\u00ebr kushte t\u00eb v\u00ebshtira p\u00ebrdorimi \u2013 familja e konektor\u00ebve IEC 63171-6 (ish 61076-3-125) nga kompania HARTING. K\u00ebta konektor\u00eb jan\u00eb t\u00eb klasifikuar nga IP20 deri n\u00eb IP67.<\/p>\n<p><img decoding=\"async\" alt=\"Kat\u00ebrth\u00ebni Ethernet: shpejt\u00ebsi e vjet\u00ebr, mund\u00ebsi t\u00eb reja\" src=\"\/wp-content\/uploads\/2020\/02\/88150dd0f844444ab76d6c3f394658f0.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nSigurisht, konektor\u00ebt dhe kabujt mund t\u00eb jen\u00eb si UTP ashtu edhe STP. <\/p>\n<h3>T\u00eb tjera<\/h3>\n<p>\nMund t\u00eb p\u00ebrdorni nj\u00eb kabull Ethernet kat\u00ebrpjesor standard, duke p\u00ebrdorur \u00e7do \u00e7ift p\u00ebr nj\u00eb kanal t\u00eb ve\u00e7ant\u00eb SPE. Q\u00eb t\u00eb mos t\u00ebrhiqni kat\u00ebr kabuj t\u00eb ve\u00e7ant\u00eb n\u00eb distanc\u00eb. Ose t\u00eb p\u00ebrdorni nj\u00eb kabull nj\u00ebpjesor, dhe n\u00eb skajin tjet\u00ebr t\u00eb vendosni nj\u00eb switch t\u00eb Ethernet-it nj\u00ebpjesor. <\/p>\n<p>A mund t\u00eb lidhni k\u00ebt\u00eb switch direkt n\u00eb rrjetin lokal t\u00eb kompanis\u00eb, n\u00ebse rrjeti me fibra optike \u00ebsht\u00eb t\u00ebrhequr p\u00ebr n\u00eb distanca t\u00eb larg\u00ebta. T\u00eb vendosni atje sensor\u00ebt dhe t\u00eb shihni t\u00eb dh\u00ebnat prej tyre k\u00ebtu. Drejt p\u00ebrmes rrjetit. Pa konvertor\u00eb nd\u00ebrfaqesh dhe portash. <\/p>\n<p>Dhe nuk \u00ebsht\u00eb domosdoshm\u00ebrisht q\u00eb t\u00eb jen\u00eb sensor\u00eb. Mund t\u00eb jen\u00eb kamerat, domofon\u00ebt ose llambat \"inteligjente\". Ngrit\u00ebsit e disa ventileve ose turniket\u00ebt n\u00eb hyrje.<\/p>\n<p>Pra, perspektivat jan\u00eb interesante. Sigurisht, SPE s\u2019do t\u2019i z\u00ebvend\u00ebsoj\u00eb t\u00eb gjitha autobus\u00ebt e fushave. Por do t\u00eb marr\u00eb nj\u00eb cop\u00eb t\u00eb konsiderueshme prej tyre. Ve\u00e7an\u00ebrisht n\u00eb automjetet.<\/p>\n<p><i>PS Nuk kam gjetur tekstin e standardit n\u00eb akses t\u00eb hapur. Informacioni i lartp\u00ebrmendur \u00ebsht\u00eb mbledhur pjes\u00eb-pjes\u00eb nga prezantime t\u00eb ndryshme dhe materiale t\u00eb disponueshme n\u00eb internet. Prandaj, n\u00eb t\u00eb mund t\u00eb ket\u00eb pasakt\u00ebsi.<\/i><br \/>\n<br \/>Burimi: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/489314\/\">habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>5 \u0444\u0435\u0432\u0440\u0430\u043b\u044f \u044d\u0442\u043e\u0433\u043e \u0433\u043e\u0434\u0430 \u0431\u044b\u043b \u0443\u0442\u0432\u0435\u0440\u0436\u0434\u0451\u043d \u043d\u043e\u0432\u044b\u0439 \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442 \u043d\u0430 10-\u043c\u0435\u0433\u0430\u0431\u0438\u0442\u043d\u044b\u0439 Ethernet. \u0414\u0430, \u0432\u044b \u0432\u0435\u0440\u043d\u043e \u043f\u0440\u043e\u0447\u0438\u0442\u0430\u043b\u0438: \u0434\u0435\u0441\u044f\u0442\u044c \u043c\u0435\u0433\u0430\u0431\u0438\u0442 \u0432 \u0441\u0435\u043a\u0443\u043d\u0434\u0443. \u0414\u043b\u044f \u0447\u0435\u0433\u043e \u0432 21-\u043c \u0432\u0435\u043a\u0435 \u043d\u0443\u0436\u043d\u0430 \u0442\u0430\u043a\u0430\u044f \u00ab\u043c\u0430\u043b\u0435\u043d\u044c\u043a\u0430\u044f\u00bb \u0441\u043a\u043e\u0440\u043e\u0441\u0442\u044c? \u0414\u043b\u044f \u0437\u0430\u043c\u0435\u043d\u044b \u0442\u043e\u0433\u043e \u0437\u043e\u043e\u043f\u0430\u0440\u043a\u0430, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0441\u043a\u0440\u044b\u0432\u0430\u0435\u0442\u0441\u044f \u043f\u043e\u0434 \u0451\u043c\u043a\u0438\u043c \u043d\u0430\u0437\u0432\u0430\u043d\u0438\u0435\u043c \u00ab\u043f\u043e\u043b\u0435\u0432\u0430\u044f \u0448\u0438\u043d\u0430\u00bb \u2014 Profibus, Modbus, CC-Link, CAN, FlexRay, HART \u0438 \u0442.\u0434. \u0418\u0445 \u0441\u043b\u0438\u0448\u043a\u043e\u043c \u043c\u043d\u043e\u0433\u043e, \u043e\u043d\u0438 \u043d\u0435\u0441\u043e\u0432\u043c\u0435\u0441\u0442\u0438\u043c\u044b \u043c\u0435\u0436\u0434\u0443 \u0441\u043e\u0431\u043e\u0439 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":71070,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-71069","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2 - aioseo.com -->\n\t<meta name=\"description\" content=\"5 \u0444\u0435\u0432\u0440\u0430\u043b\u044f \u044d\u0442\u043e\u0433\u043e \u0433\u043e\u0434\u0430 \u0431\u044b\u043b.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/prohoster.info\/sq\/blog\/administrirovanie\/chetvertushka-ethernet-a-staraya-skorost-novye-vozmozhnosti\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO 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