xDSL\u6cdb\u6307\u6240\u6709dsl\u6280\u8853
\u6b64\u6280\u8853\u4f7f\u7528\u73fe\u6210\u7684twised pair telephone\u50b3\u9001\u9ad8\u983b\u5bec\u8cc7\u6599\u4ee5\u670d\u52d9\u7528\u6236\u7684\u5bec\u983b\u6280\u8853
dsl\u4e0d\u662f\u5b8c\u5168\u7684\u7aef\u5230\u7aef\u9023\u63a5,dsl\u7684\u9023\u63a5\u662f\u5efa\u7acb\u5728cpe\u548cdslam\u4e4b\u9593
ps:
\u7528\u6236\u7368\u4eab\u55ae\u4e00\u7dda\u8def,frequencies over dedicated line to central office
ps:
dsl\u670d\u52d9\u88ab\u8996\u70babroadband\u662f\u76f8\u5c0d\u65bc\u5178\u578bLAN\u7684baseband<\/p>\n\n\n\n
………………..<\/p>\n\n\n\n
\u5e38\u898b\u7684xDSL\u6709\u4ee5\u4e0b\u5e7e\u7a2e ADSL(Asymmetric Digital Subscriber Line,\u975e\u5c0d\u7a31\u6578\u4f4d\u7528\u6236\u8ff4\u8def)<\/strong> RADSL(rate adaptive asymmetric digital subscriber line,\u53ef\u8abf\u901fDSL)<\/strong> SDSL(Signle-Line DSL)\u4ee5\u4e00\u5c0d\u96fb\u8a71\u7dda\u4f5c\u50b3\u8f38<\/strong><\/p>\n\n\n\n SDSL(Symmetric DSL,\u5c0d\u7a31\u5f0f\u6578\u4f4d\u7528\u6236\u8ff4\u8def)<\/strong> SHDSL(Single-pair High Speed DSL,\u55ae\u9285\u7d5e\u7dda\u9ad8\u901fDSL)\u4e5f\u7a31HDSL2<\/strong> VDSL(Very High Data Rate DSL,\u8d85\u9ad8\u901f\u6578\u4f4d\u7528\u6236\u8ff4\u8def)<\/strong> VoDSL(Voice over Digital Subscriber Line,\u8a9e\u97f3\u642d\u8f09\u6578\u4f4d\u7528\u6236\u8ff4\u8def)<\/strong> IDSL(ISDN Digital Subscriber Line,\u6574\u5408\u670d\u52d9\u6578\u4f4d\u7db2\u8def\u6578\u4f4d\u7528\u6236\u8ff4\u8def)<\/strong> ……………………<\/p>\n\n\n\n adsl\u7684\u9023\u7dda\u67b6\u69cb:<\/strong> DSLAM(DSL Access Multiplexer,DSL\u5b58\u53d6\u591a\u5de5\u6a5f)<\/strong> ADSL\u7684\u57fa\u672c\u7d44\u614b\u662f\u4e00\u53f0ATU-R\u8207\u4e00\u53f0ATU-C\u5c0d\u63a5<\/strong> adsl\u914d\u767c\u7684ip\u6709\u5169\u7a2e<\/strong> … <\/p>\n\n\n\n hinet\u7684\u670d\u52d9\u5206\u70ba: xDSL\u6cdb\u6307\u6240\u6709dsl\u6280\u8853\u6b64\u6280\u8853\u4f7f\u7528\u73fe\u6210\u7684twised pa …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[28],"tags":[],"class_list":["post-843","post","type-post","status-publish","format-standard","hentry","category-wan"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/posts\/843","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/comments?post=843"}],"version-history":[{"count":0,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/posts\/843\/revisions"}],"wp:attachment":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/media?parent=843"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/categories?post=843"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/tags?post=843"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
DSL(Digital Subscriber Line,\u6578\u4f4d\u7528\u6236\u8ff4\u8def)<\/strong>
1\u5c0d\u7dda,\u4e0a\u4e0b\u5c0d\u7a31,160kb\/s
\u900f\u904e\u96d9\u7d5e\u7dda\u7528\u6578\u64da\u6a5f\u9023\u63a5\u96fb\u8166\u7cfb\u7d71\u8207\u6578\u4f4d\u8ff4\u8def<\/p>\n\n\n\n
1\u5c0d\u7dda,\u4e0a\u4e0b\u4e0d\u5c0d\u7a31,\u4e0a\u884c64Kbps-640Kbps,\u4e0b\u884c1.5Mbps-9Mbps
\u4e4b\u6240\u4ee5\u53ef\u7a81\u7834\u4e00\u822c\u6578\u64da\u6a5f\u6700\u9ad8\u901f\u738756kbps\u7684\u9650\u5236\uff0c\u4e3b\u8981\u95dc\u9375\u5728\u65bc\u5176\u4e0a\u884c\u8207\u4e0b\u884c\u7684\u983b\u5bec\u662f\u4e0d\u5c0d\u7a31\u7684
\u7528\u5206\u983b\u591a\u5de5\u6280\u8853\u628a\u96fb\u8a71\u7dda\u5206\u6210(0-25khz:pots\u820a\u5f0f\u96fb\u8a71\u670d\u52d9\u53ea\u75284khz,25-200khz:\u4e0a\u884c,250-1mhz\u4e0b\u884c)\u7368\u7acb\u901a\u9053\uff0c\u907f\u514d\u76f8\u4e92\u5e72\u64fe
\u4e0d\u4f54\u7528\u5340\u57df\u8ff4\u8def,\u540c\u6642\u8207\u96fb\u8a71\u670d\u52d9\u4e26\u5b58,\u96e2\u56fa\u7db2\u6a5f\u623f\u7d044\u516c\u91cc\u7684\u8ddd\u96e2\u9650\u5236,\u7dda\u6750\u54c1\u8cea\u53ca\u6eab\u6fd5\u5ea6,\u9285\u7dda\u76f4\u5f91\u6703\u5f71\u97ff\u670d\u52d9\u8ddd\u96e2
\u5177\u53ef\u9069\u61c9\u6027adaptive\uff1a\u8b93\u7dda\u8def\u5169\u7aef\u6578\u64da\u6a5f\u5075\u6e2c\u9023\u7dda\u7279\u6027,\u5354\u8abf\u51fa\u6700\u9069\u5408\u65b9\u5f0f\u9023\u7dda
ADSL\u4f7f\u7528\u8abf\u8b8a\u6280\u8853\u6709\u4e09\u7a2e\uff1a
\u3000DMT(Discrete Multi-Tone)\u5df2\u6709\u591a\u5bb6\u570b\u969b\u901a\u8a0a\u5927\u5ee0\u63a1\u7528\uff0c\u96fb\u901a\u6240\u4e5f\u5c07\u9075\u5faaDMT\u6a19\u6e96
\u3000\u3000\u96e2\u6563\u591a\u97f3\u8abf\u8b8a\u6280\u8853,\u7d50\u5408\u5206\u983b\u591a\u5de5\u53ca\u53cd\u5411\u591a\u5de5\u6280\u8853\u800c\u6210
\u3000\u3000\u5c07\u983b\u5bec\u5206\u5272286\u500b\u4e0d\u540csubchannel,255\u7528\u4f5c\u4e0b\u8f0931\u7576\u4e0a\u50b3,1\u500b\u505a\u63a7\u5236\u7528
\u3000\u3000echo cancellation(\u6d88\u9664\u56de\u97f3)\u8207\u96dc\u8a0a\u7684\u8868\u73fe\u8f03\u4f73\u800c\u70baANSI\uff0cETSI \u53ca itu \u6240\u63a1\u7528
\u3000CAP(Carrierless Amplitude and Phase Modulation)
\u3000\u3000\u7121\u8f09\u6ce2\u5e45\u76f8\u8abf\u5236,\u8fd1\u4f3c\u65bcQAM,\u65b9\u6cd5\u7c21\u55ae\u3001\u5bb9\u6613\u5be6\u73fe
\u3000QAM(Quadrature Amplitude Modulation)
\u3000\u3000\u53ef\u8207\u73fe\u6709\u5b58\u53d6\u8a2d\u5099\u6574\u5408\uff0c\u7db2\u8def\u67b6\u69cb\u4e0d\u9808\u5927\u5e45\u4fee\u6539
\u3000\u3000\u5229\u7528\u73fe\u6709\u96fb\u4fe1\u7dda\u8def\uff0c\u96fb\u4fe1\u696d\u8005\u53ea\u9700\u5c07DSLAM\u653e\u5230\u9060\u7aef\u8a2d\u5099\u4e2d\uff0c\u4fbf\u53ef\u4ee5\u589e\u52a0\u65b0\u7684ADSL\u983b\u9053
\u3000\u3000\u4e0d\u9700\u8017\u8cbb\u5927\u91cf\u91d1\u9322\u548c\u6642\u9593\u5728\u7cfb\u7d71\u7684\u8a2d\u7f6e\uff0c\u4e5f\u53ef\u4ee5\u7e7c\u7e8c\u4f7f\u7528\u539f\u6709\u7684\u96fb\u4fe1\u7cfb\u7d71\uff0c
\u3000\u3000\u5c0d\u5ba2\u6236\u4f86\u8aaa\u6839\u672c\u611f\u89ba\u4e0d\u51fa\u6709\u4efb\u4f55\u7684\u6539\u8b8a\uff0c\u53ea\u8981\u63db\u6389\u820a\u5f0f\u7684\u985e\u6bd4\u5f0f\u6578\u64da\u6a5f\uff0c\u4fbf\u53ef\u4ee5\u64c1\u6709\u5168\u5929\u501924\u5c0f\u6642\u7684\u50b3\u7d71\u96fb\u8a71\u7cfb\u7d71\u548cADSL\u670d\u52d9\u3002<\/p>\n\n\n\n
1\u5c0d\u7dda,\u4e0a\u4e0b\u4e0d\u5c0d\u7a31,\u4e0a\u884c\u4e0b\u884c\u901f\u5ea6\u53ef\u8abf
HDSL(High Data Rate DSL,\u9ad8\u901f\u6578\u4f4d\u7528\u6236\u8ff4\u8def)<\/strong>
2\u5c0d\u7dda,\u4e0a\u4e0b\u5c0d\u7a31,1.544Mbps(T1\u901f\u5ea6)
3\u5c0d\u7dda,\u4e0a\u4e0b\u5c0d\u7a31,2.048Mbps(E1\u901f\u5ea6)
\u4ee52BIQ\u53ca\u8ff4\u97f3\u6d88\u9664\u6280\u8853\u70ba\u5e95,\u4e0d\u53d7\u4fe1\u865f\u8870\u6e1b\u5f71\u97ff
\u53ef\u7528\u542bbridge tap(\u6a4b\u5f0f\u5206\u63a5\u982d)\u7684\u96fb\u8a71\u7cfb\u7d71
\u5bb9\u932f\u9ad8,\u4e00\u689d\u65b7\u7dda\u901f\u7387\u53ea\u6e1b\u534a
\u67093Miles\u7684\u8ddd\u96e2\u9650\u5236\uff0c\u9700\u52a0\u88dd\u8a0a\u865fRepeater(\u653e\u5927\u5668)
\u7f3a\u9ede\u662f\u9700\u8981\u4f7f\u7528\u5169\u5c0d\u96d9\u7d5e\u7dda\uff0c\u800c\u4f7f\u5f97\u7528\u6236\u8ff4\u8def\u5fc5\u9808\u91cd\u65b0\u62c9\u7dda<\/p>\n\n\n\n
1\u5c0d\u7dda,\u4e0a\u4e0b\u5c0d\u7a31,1.544Mbps\u62162.048Mbps
\u63a1echo cncellation(\u8ff4\u97f3\u6d88\u9664\u6280\u8853)\u9054\u5230\u5168\u96d9\u5de5\u50b3\u8f38
\u4f4e\u6210\u672cT1\u9023\u7dda\u4e4b\u66ff\u4ee3\u65b9\u6848,\u50b3\u7d71\u6578\u64da\u5c08\u7dda\u7684\u4e00\u7a2e\u66ff\u4ee3\u6280\u8853,\u4e3b\u8981\u61c9\u7528\u65bc\u9ad8\u983b\u5bec\u8996\u8a0a\u6703\u8b70\u3001\u9060\u7a0b\u6559\u5b78\u53ca\u5c08\u7528\u5bec\u983b\u7db2\u8def\u7684\u5efa\u7acb\u7b49<\/p>\n\n\n\n
1\u5c0d\u7dda,\u4e0a\u4e0b\u5c0d\u7a31,192Kbps-2.3Mbps,6mbps,10mbps
\u9023\u7dda\u8ddd\u96e2\u5247\u6bd4SDSL\u591a\u51fa30%,\u50b3\u8f38\u8ddd\u96e2\u70ba2~3\u516c\u91cc
\u65b0\u4e00\u4ee3\u7684\u5c0d\u7a31\u5f0fDSL\u6280\u8853\uff0c\u4f7f\u7528ITU-T\u6a19\u6e96G.991.2(g.shdsl),\u9010\u6f38\u6210\u70ba\u76ee\u524d\u5c0d\u7a31\u5f0fDSL\u5e02\u5834\u7684\u4e3b\u6d41<\/p>\n\n\n\n
1\u5c0d\u7dda,\u4e0a\u4e0b\u4e0d\u5c0d\u7a31,\u4e0a\u884c1.5-6mbps,\u4e0b\u884c1.9-52.8Mbps,\u66f4\u751a\u905460Mbps
\u5c0d\u50b3\u8f38\u7dda\u8def\u8ddd\u96e2\u6975\u654f\u611f,\u9700\u88dd\u96c6\u8a0a\u9ede(\u4e5f\u53ebONU,optical network unit,fiber\u7db2\u8def\u55ae\u5143)\u518d\u7d93fiber\u9023\u56de\u6a5f\u623f
\u9023\u7dda\u8ddd\u96e2\u53ea\u6709\u5e7e\u767e\u516c\u5c3a<\/p>\n\n\n\n
\u628a\u4e00\u689d\u9ad8\u901f\u6578\u4f4d\u7528\u6236\u8ff4\u8def\u8b8a\u6210\u6578\u689d\u8a9e\u97f3\u7dda\u8def,\u8b93\u4e00\u689d\u9285\u96fb\u8a71\u7dda\u50b3\u8f38\u6578\u901a
\u70baVoDSL\u4f7f\u7528\u5728\u96fb\u8a71\u7db2\u8def\u4e0a\u50b3\u8f38\uff0c\u5927\u90e8\u5206\u4f7f\u7528ATM\u50b3\u8f38\u5354\u5b9a,VoDSL\u5728DSLAM\u5c31\u53ef\u76f4\u63a5\u8207PSTN\u7db2\u8def\u9023\u63a5\uff0c\u4e0d\u5fc5\u900f\u904eInternet\u7db2\u8def<\/p>\n\n\n\n
ISDN\u7dda,\u4e0a\u4e0b\u5c0d\u7a31,64K,128K,144K
\u4ee5ISDN\u6280\u8853\u70ba\u57fa\u790e\u7684\u6578\u4f4d\u7528\u6236\u8ff4\u8def\u8a2d\u5099,\u63a1\u7528\u76f8\u540c\u76842B1Q\u7dda\u8def
\u50b3\u8f38\u905418,000\u82f1\u544e,\u7d93\u6a19\u6e96ISDN\u4e2d\u7e7c\u5668,\u8ddd\u96e2\u53ef\u5ef6\u4f38\u523036,000\u82f1\u544e\u9060<\/p>\n\n\n\n
\u96fb\u4fe1\u516c\u53f8DSLAM>atu-c>\u96fb\u8a71\u7dda>\u5c08\u7528\u5206\u5c90\u5668,\u6216\u7a31spliter(\u5206\u983b\u5668),\u5728\u9023\u63a5\u4ee5\u4e0b\u5169\u8a2d\u5099
>pots\u96fb\u8a71
>atu-r,LAN port>\u00a0nat\u53ef\u6709\u53ef\u7121\u00a0>\u96fb\u8166\u7db2\u8def\u5361<\/p>\n\n\n\n
\u70ba\u63a5\u53d6\u7db2\u8def\u7684\u5c40\u7aef\u8a2d\u5099 ex:cisco 6100
\u529f\u80fd:\u5c07\u7531\u96fb\u8a71\u7dda\u6536\u5230\u7684\u8a9e\u97f3\u8a0a\u865f\u5206\u96e2\u51fa\u4f86\u5f8c\u9001\u5f80PSTN\uff0c\u518d\u5c07\u6578\u64da\u8a0a\u52d9\u4f5c\u532f\u96c6\u4ee5\u53ca\u57fa\u65bcQoS\u8981\u6c42\u7684\u7d71\u8a08\u591a\u5de5\u5f8c\u9001\u5f80\u50b3\u8f38\u6578\u64da\u8a0a\u52d9\u7684\u7db2\u8def
\u57fa\u65bcATM\u6280\u8853\u800c\u8a2d\u8a08:\u56e0\u65e9\u671fDSL\u6676\u7247\u8a2d\u8a08\u7684\u7aef\u5c0d\u7aef\u50b3\u8f38\u6a21\u5f0f\u662fATM
\u4f7f\u7528ATM\u6280\u8853\u7684\u597d\u8655\u662fATM\u5df2\u662f\u76f8\u7576\u6210\u719f\u7684\u6280\u8853\uff0c\u5177\u6709QoS\u53ca\u7d71\u8a08\u591a\u5de5\u7b49\u7279\u6027\uff0c\u6676\u7247\u53ca\u7cfb\u7d71\u8a2d\u8a08\u6642\u91dd\u5c0d\u56fa\u5b9a\u9577\u5ea6\u7684ATM Cell\u8655\u7406\u8f03\u7c21\u55ae
\u50b3\u8f38\u7db2\u8def\u5df2\u5b58\u5728\u4e0d\u5c11\u7684ATM\u4ea4\u63db\u6a5f\uff0c\u7576\u9023\u7dda\u5bb9\u91cf\u9700\u6c42\u589e\u52a0\u6642\uff0c\u96fb\u4fe1\u696d\u8005\u53ea\u9700\u555f\u7528\u4ea4\u63db\u6a5f\u4e0a\u5c1a\u672a\u4f7f\u7528\u7684\u57e0\uff0c\u53ef\u4ee5\u6e1b\u5c11\u65b0\u7684\u6295\u8cc7
\u5229\u7528ATM\u50b3\u8f38\u5c01\u5305\u8a0a\u52d9\u6700\u5927\u7684\u7f3a\u9ede\u5c31\u662f\u983b\u5bec\u7684\u6d6a\u8cbb
\u6280\u8853\u8da8\u52e2\u662f\u4ee5\u5c01\u5305\u70ba\u50b3\u8f38\u55ae\u4f4d\u7684IP DSLAM\u5c07\u9010\u6f38\u53d6\u4ee3ATM DSLAM<\/p>\n\n\n\n
ATU-C(ADSL Terminal Unit-Central office)ADSL\u6a5f\u623f\u7aef\u7d42\u7aef\u8a2d\u5099
\u805a\u96c6\u5728\u96fb\u8a71\u7db2\u8def\u4e2d\u5fc3\u6a5f\u623f\uff0c\u70ba\u4e00\u7247\u4e00\u7247\u7684\u6a21\u7d44
ATU-R(ADSL Terminal Unit-Remote)ADSL\u7528\u6236\u7aef\u7d42\u7aef\u8a2d\u5099,\u53c8\u7a31spliter
\u5206\u6563\u5728\u5404\u500b\u7528\u6236\u7aef\u53ef\u4ee5\u662f\u5916\u63a5\u5f0f\u6216\u5167\u5efa\u5361\u5f0f<\/p>\n\n\n\n
\u6d6e\u52d5ip:\u9700\u7528ppp\u4f86\u64a5\u63a5
\u3000\u53ef\u900f\u904e\u52d5\u614bDNS\u4f86\u642d\u914d\u6d6e\u52d5IP\u9054\u5230\u67b6\u8a2d\u7db2\u7ad9\u7684\u76ee\u7684\uff0c\u4f46\u662f\u52d5\u614bDNS\u4e3b\u6a5f\u5982\u679c\u6545\u969c,\u5247\u7528\u6236\u7db2\u7ad9\u4fbf\u7121\u6cd5\u767c\u63ee\u4f5c\u7528
\u3000\u7121\u6cd5\u63d0\u4f9bDNS\u53cd\u89e3\u529f\u80fd\uff0c\u7576\u7528\u6236\u9700\u8981\u67b6\u8a2de-mail Server\u6642\uff0c\u6d6e\u52d5IP\u66f4\u7121\u6cd5\u7528\u4f86\u8a2d\u5b9aMail Exchanger(MX) record
\u56fa\u5b9aip:\u6c38\u4e45\u9023\u7dda
\u3000 <\/p>\n\n\n\n
\u7db2\u8def\u578b
\u3000\u63a1\u7528Routing Mode\u65b9\u5f0f\u4f9b\u88dd
\u3000gateway(\u9810\u8a2d\u9598\u9053)\u662f\u8a2d\u5b9a\u5728ATU-R\u4e0a\u9762\uff0cIP\u914d\u767c\u4e5f\u8f03\u6709\u5f48\u6027\uff0c\u5f9e8\u500b\u523032\u500b\u4e0d\u7b49
\u3000\u9810\u8a2d\u914d\u767c\u7684IP\u6578\u4e2d\u6703\u7528\u63893\u500bip\uff0c\u4e00\u500bNet IP\uff1b\u53e6\u4e00\u500bBroadcast IP\uff0c\u53ca\u8a2d\u5728ATU-R\u4e0a\u7576\u4f5cgateway
\u3000ex:8\u500b\u56fa\u5b9aIP\uff0c\u5be6\u969b\u53ef\u8a2d\u5b9a\u5728\u4e3b\u6a5f\u4e0a\u7684\u53ea\u67095\u500b
\u591a\u6a5f\u578b
\u3000\u63a1\u7528Bridging Mode\u65b9\u5f0f\u4f9b\u88dd,\u7531\u539f\u55ae\u6a5f\u578b(\u56fa\u5b9a1 IP)\u9032\u5316\u800c\u6210
\u3000gateway(\u9810\u8a2d\u9598\u9053)\u4e0d\u5728ATU-R\u4e0a\uff0c\u800c\u662f\u5728\u9060\u7aef\u7684BBRAS(\u5bec\u983b\u4f3a\u670d\u5668)
\u3000\u6c92\u6709\u6263\u63893\u500bIP\u7684\u60c5\u5f62,\u4f46\u9650\u5b9a\u53ea\u67093\u500bip\u53ef\u7528<\/p>\n","protected":false},"excerpt":{"rendered":"