SS7<\/a> paties\u012bb\u0101 ir tikai sl\u0113gta signaliz\u0101cijas sist\u0113ma. To izmanto mezgli (piem\u0113ram, kaimi\u0146u centr\u0101le, MSC\/VLR, GMSC utt.) Telekomunik\u0101ciju t\u012bkl\u0101.<\/p>\nApvienotaj\u0101 Karalist\u0113 tas ir paz\u012bstams k\u0101 c 7 (CCITT # 7), numurs 7 kop\u0101 ar Common Channel Interoffice Signaling 7 (CCIS7).<\/p>\n
SS7 protokols ir labi paz\u012bstams vis\u0101 pasaul\u0113, izmantojot Q.700 s\u0113rijas padomus, ko 1988. gad\u0101 izveidoja itu t.<\/p>\n
Interneta in\u017eenierzin\u0101t\u0146u darba grupa (IETF) ir defin\u0113jusi SIGTRAN protokolu paketi, kas \u012bsteno otr\u0101, tre\u0161\u0101 un ceturt\u0101 l\u012bme\u0146a protokolus, harmoniski izmantojot SS7. Da\u017ek\u0101rt to sauc ar\u012b par pseidoneide\u0101lo SS7, un tas ir izk\u0101rtots ap pl\u016bsmas vad\u012bbas p\u0101rraides protokola (SCTP) transporta meh\u0101nismu, ko var izmantot interneta protokolu t\u012bklos, piem\u0113ram, internet\u0101.<\/p>\n
<\/p>\n
\u012asa SS7 v\u0113sture<\/h2>\n
S\u0101kot ar pag\u0101ju\u0161\u0101 gadsimta se\u0161desmitajiem gadiem, publiskie komut\u0113jamie telefonu t\u012bkli (PSTN) tika veidoti, izmantojot analog\u0101s tehnolo\u0123ijas un ar\u012b vair\u0101kas joslas signaliz\u0101cijas metodes. Palielinoties parasto fiks\u0113t\u0101s telefonijas galalietot\u0101ju skaitam un pieaugot piepras\u012bjumam p\u0113c progres\u012bviem pakalpojumiem, pakalpojumu sniedz\u0113ji \u0101tri s\u0101ka izmantot vecos protokolus, piem\u0113ram, R1 CAS. Pat ISDN protokola revol\u016bcija izr\u0101d\u012bj\u0101s liels solis telekomunik\u0101ciju biznes\u0101, p\u0101rejot no joslas signaliz\u0101cijas protokola (ar to\u0146iem, nozagtiem bitiem no balss stacijas vai fokus\u0113ta kan\u0101la) uz \u0101rpusjoslas signaliz\u0101ciju (atdal\u012btu no balss kan\u0101liem) ar zi\u0146ojumos balst\u012btiem primit\u012bviem, kas piem\u0113roti digit\u0101lajam audio.<\/p>\n
Pat ja ISDN laboja daudzas vec\u0101ku protokolu probl\u0113mas, t\u0101 masveida uzst\u0101d\u012b\u0161ana no pamatsist\u0113m\u0101m nekad nenotika, t\u0101d\u0113j\u0101di pieg\u0101d\u0101t\u0101jiem radot sare\u017e\u0123\u012btu iek\u0101rtu savstarp\u0113j\u0101s sadarb\u012bbas hierarhiju (vai m\u0113\u0123inot to dar\u012bt). Lai gan ISDN nodro\u0161in\u0101ja vienk\u0101r\u0161\u0101ku risin\u0101jumu, lai galalietot\u0101jiem nodro\u0161in\u0101tu papildu risin\u0101jumus (t. i., zvanu aiztur\u0113\u0161anu, zvanu p\u0101rs\u016bt\u012b\u0161anu),\" ISDN pak\u0101peniski migr\u0113ja uz \u0161\u012bs sist\u0113mas robe\u017eas tuv\u0101k galalietot\u0101jam. Turkl\u0101t neviens r\u012bku pieg\u0101d\u0101t\u0101js patiesi ne\u012bstenoja ISDN pamatnosac\u012bjumu specifik\u0101cijas, t\u0101d\u0113j\u0101di radot daudzus kaimi\u0146os eso\u0161us variantus un tr\u016bkumus sist\u0113mu integratoriem.<\/p>\n
<\/p>\n
Taj\u0101 laik\u0101 starptautiskie konsorciji s\u0101ka koncentr\u0113ties uz koordin\u0113tu zvanu izveides metodi, lai pied\u0101v\u0101tu daudzus pakalpojumus (tostarp tos, kurus jau atbalst\u012bja ISDN un vec\u0101ki protokoli), k\u0101 ar\u012b lai var\u0113tu veidot jaunu programmat\u016bru (uz\u0146\u0113mumus ), neuzlabojot pilnu t\u012bkla strukt\u016bru. SS7 (jeb Signaliz\u0101cijas sist\u0113ma 7) jau vair\u0101kus gadus iepriek\u0161 tika izv\u0113rsta vis\u0101 plan\u0113tas teritorij\u0101, bet tagad t\u0101 sasniedz to, kas tai bija iecer\u0113ts: nodro\u0161ina piln\u012bgu sazi\u0146as standartu, kas pied\u0101v\u0101 daudzus risin\u0101jumus un sp\u0113j piel\u0101goties sabiedr\u012bbas pras\u012bb\u0101m.<\/p>\n
Pat tad, kad tika ieviestas viet\u0113j\u0101s versijas un notiku\u0161as daudzas izmai\u0146as \u0161aj\u0101 protokol\u0101, \u0161is signaliz\u0101cijas protokols tagad ir savienots liel\u0101kaj\u0101 da\u013c\u0101 noz\u012bm\u012bg\u0101ko telefonu t\u012bklu vis\u0101 pasaul\u0113. Tas ietv\u0113ra ar\u012b \u012bpa\u0161\u012bbu, kas bija noz\u012bm\u012bga ikvienai kopienai vis\u0101 pasaul\u0113, - k\u013c\u016bdu toleranci un robustumu. SS7 tika izveidots, lai t\u012bkla mezgliem nevajadz\u0113tu izpild\u012bt katru protokola paketes da\u013cu, ja tas nav nepiecie\u0161ams.<\/p>","protected":false},"excerpt":{"rendered":"
Signaliz\u0101cijas sist\u0113ma Nr. 7: SS7 - Signaliz\u0101cijas sist\u0113ma # 7 - ir bijusi agr\u0101k. Signaliz\u0101cija un liel\u0101k\u0101 da\u013ca oper\u0101ciju, ko var izmantot, tika apkopota, sadarbojoties operatoriem \/ \/ pieg\u0101d\u0101t\u0101jiem \/ standartiz\u0101cijas organiz\u0101cij\u0101m (CCITT, ETSI, itu t u.c.) . SS7 paties\u012bb\u0101 ir tikai sl\u0113gta signaliz\u0101cija...<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-454","post","type-post","status-publish","format-standard","hentry","category-ss7-sms"],"yoast_head":"\n
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