ISDN(integrated services digital network,\u6574\u9ad4\u670d\u52d9\u6578\u4f4d\u7db2\u8def)
\u4e5f\u7a31N-ISDN
\u4e00\u500b\u6578\u4f4d\u96fb\u8a71\u7db2\u8def\u570b\u969b\u6a19\u6e96,\u5178\u578b\u7684\u96fb\u8def\u4ea4\u63db\u7db2\u8def\u7cfb\u7d71,1976ITU-T
\u7531\u96fb\u8a71\u516c\u53f8\u63d0\u51fa\u7684\u901a\u8a0a\u5354\u5b9a\uff0c\u5176\u8a2d\u8a08\u662f\u8981\u80fd\u5728\u65e2\u6709\u7684\u96fb\u8a71\u7db2\u8def\u4e0a\u904b\u884c<\/p>\n\n\n\n
\u6b50\u6d32\u666e\u53ca\u7684\u96fb\u8a71\u7db2\u8def\u5f62\u5f0f
GSM\u884c\u52d5\u96fb\u8a71\u6a19\u6e96\u4e5f\u53ef\u4ee5\u57fa\u65bcISDN\u50b3\u8f38\u6578\u64da
\u5206\u6642\u591a\u5de5,\u7528\u865f\u78bc\u64a5\u63a5
\u5e38\u7528ppp\u4f86\u63d0\u4f9b\u8cc7\u6599\u50b3\u8f38,\u93c8\u8def\u63a7\u5236,\u4ee5\u53ca\u8a8d\u8b49<\/p>\n\n\n\n
\u512a\u9ede:
\u666e\u901a\u7684\u9285\u7e9c\u4ee5\u66f4\u9ad8\u7684\u901f\u7387\u548c\u8cea\u91cf\u50b3\u8f38\u8a9e\u97f3\u548c\u6578\u64da
\u4f7f\u7528\u73fe\u6709\u7684\u96fb\u8a71\u7db2\u8def\u5c31\u53ef\u63d0\u4f9b\u65b0\u7684\u670d\u52d9\uff0c\u9019\u5c0d\u65bc\u7db2\u8def\u8cc7\u6e90\u7684\u4f7f\u7528\u53ef\u6709\u8f03\u4f73\u7684\u5f48\u6027\u53ca\u6548\u7387\uff0c\u4e26\u53ef\u9054\u5230\u6210\u672c\u7684\u6709\u6548\u63a7\u5236
\u6a19\u6e96\u7684Signalling(\u4fe1\u865f)\u53ca\u7db2\u8def\u7ba1\u7406\u5354\u5b9a\uff0c\u53ef\u5efa\u7acb\u8f03\u4f73\u7684\u7db2\u8def\u7ba1\u7406\u74b0\u5883\uff0c\u63d0\u5347\u670d\u52d9\u54c1\u8cea\u3002
\u6297\u5e72\u64fe\u4f73,\u5168\u90e8\u6578\u4f4d\u5316\u7684\u96fb\u8def\uff0c\u6240\u4ee5\u5b83\u80fd\u5920\u63d0\u4f9b\u7a69\u5b9a\u7684\u6578\u64da\u670d\u52d9\u548c\u9023\u63a5\u901f\u5ea6,\u4e0d\u50cf\u985e\u6bd4\u7dda\u8def\u90a3\u6a23\u5c0d\u5e72\u64fe\u6bd4\u8f03\u660e\u986f
\u6e96\u5099\u547c\u53eb\u7684\u901f\u5ea6\u8f03\u985e\u6bd4\u7684\u6578\u64da\u6a5f\u5feb<\/p>\n\n\n\n
\u5e38\u7528\u505a\u5099\u63f4
\u53ef\u7528threshold(a\u9023\u7dda\u5feb\u5fd9\u788c\u6642\u555f\u52d5b\u9023\u7dda,a\u9023\u7dda\u4e0d\u5fd9\u788c\u6642\u7d50\u675fb\u9023\u7dda)
\u53ef\u7528idle(\u8cc7\u6599\u50b3\u8f38\u5b8c\u5f8c\u904e\u5e7e\u79d2\u65b7\u7dda)
\u53ef\u8a2d\u5b9afair queue(\u591a\u689d\u7dda\u8def\u53ef\u4f7f\u7528)\u53capriority queue(\u5148\u4f7f\u7528\u67d0\u4e00\u689d\u7dda\u8def)\u63d0\u4f9b\u670d\u52d9\u5982\uff1a
\u7dca\u6025\u96fb\u8a71\u3001\u986f\u793a\u4f86\u8a71\u865f\u78bc\u3001\u8f49\u63a5\u670d\u52d9\u3001\u9810\u5b9a\u865f\u78bc\u8f49\u63a5\u670d\u52d9\u3001\u591a\u65b9\u901a\u8a71\u3001ISDN\u96fb\u8a71\u6a5f\u53d6\u4ee3\u90e8\u4efd\u7b54\u9304\u6a5f\u7684\u529f\u80fd\u3001\u5efa\u7acb\u79c1\u4eba\u7db2\u8def\u3001\u50b3\u771f\u3001\u96fb\u50b3\u8996\u8a0a\u3001\u7dda\u4e0a\u96fb\u5b50\u67e5\u8a62\u3001\u96fb\u5b50\u8cfc\u7269\u7b49\u591a\u6a23\u5316\u4e4b\u6578\u4f4d\u901a\u8a0a\u670d\u52d9<\/p>\n\n\n\n
\u76f8\u95dc\u8a2d\u5099\u6709\uff1a
ISDN\u4ea4\u63db\u5c40\uff1a\u9023\u63a5\u5168\u90e8\u7528\u6236\u900f\u904e\u6578\u4f4d\u7ba1\u7dda\u8f49\u5230\u5408\u9069\u7684IDN\u6574\u5408\u6578\u4f4d\u7db2\u8def(\u542b\u5206\u5c01\u4ea4\u63db,\u96fb\u8def\u4ea4\u63db..\u7b49\u7db2\u8def)\u7528
NT(network termination,\u7db2\u8def\u7d42\u7aef\u8a2d\u5099):\u5b9a\u7fa9\u5be6\u9ad4\u5c64\u7dad\u8b77,\u96fb\u529b\u8f49\u63db\u6a19\u6e96,\u786c\u9ad4\u63d2\u5ea7\u5916\u578b,\u4e26\u5206\u70ba:
\u3000NT1:\u9023\u7d50\u7528\u6236\u6578\u4f4d\u7cfb\u7d71\u5230\u6578\u4f4d\u8ff4\u8def,\u5c07\u7528\u6236\u8cc7\u6599\u4e32\u6d41\u7d44\u5408\u6210\u8a0a\u6846\u9001\u5230\u6578\u4f4d\u7db2\u8def,\u4e26\u5c07t\u4ecb\u9762\u8f49\u6210u\u4ecb\u9762\u9023\u5230isdn\u4ea4\u63db\u6a5f\u6216pbx
\u3000ps:u\u4ecb\u9762\u70ba2\u7dda\u5f0f,\u4ecb\u65bcNT1\u548cisdn\u4ea4\u63db\u6a5f\u4e4b\u9593,\u82e5\u60f3\u9ad8\u901f\u50b3\u8f38\u53ef\u9078\u7528fiber:
\u3000NT2:\u57f7\u884cOSI layer 1(\u63d0\u4f9b\u591a\u5de5)2(\u6d41\u91cf\u63a7\u5236)3(\u5206\u5c01),\u4e26\u5c07s\u4ecb\u9762\u8f49\u5230t\u4ecb\u9762\u9023\u5230NT1
\u3000ps:t\u4ecb\u9762\u70ba4\u7dda\u5f0f,\u5c07\u591a\u500b\u9ad8\u901f\u50b3\u8f38\u6578\u4f4d\u4fe1\u865f\u8f49\u63db\u6210\u9ad8\u901f\u50b3\u8f38\u7684\u6578\u4f4d\u4fe1\u865f,\u901a\u5e38\u4ecb\u65bcNT1\u548cNT2\u9593
\u3000ps:\u5927\u90e8\u4efdnt1\u6703\u5305\u542bnt2,\u4e26\u5c07s\u4ecb\u9762\u548ct\u4ecb\u9762\u5408\u4f75\u6210s\/t\u4ecb\u9762
\u3000ps:\u5317\u7f8ent1\u5c6ccpe,\u5ba2\u6236\u9700\u7528u\u4ecb\u9762\u9023,\u6b50\u6d32nt1\u5c6c\u96fb\u4fe1\u516c\u53f8,\u5ba2\u6236\u9700\u7528s\/t\u4ecb\u9762\u9023
TE(terminal equipment,\u7d42\u7aef\u6a5f\u8a2d\u5099),\u5206\u70ba:
\u3000TE1:\u652f\u63f4ISDN\u529f\u80fd\u7684\u8a2d\u5099,\u5e38\u4ee5s\/t\u4ecb\u9762\u65bcNT1\u76f8\u9023,\u6216s\u4ecb\u9762\u8207NT2\u76f8\u9023
\u3000TE2:\u4e0d\u652f\u63f4ISDN\u529f\u80fd\u7684\u8a2d\u5099,\u53ef\u7c4d\u7531TA\u5f97\u5230ISDN\u529f\u80fd,\u901a\u5e38\u7c4d\u7531TA\u8207NT1\u76f8\u9023
\u3000ps:r\u4ecb\u9762,\u4ecb\u65bcTE2\u8207TA
TA(terminal adapter,\u7d42\u7aef\u6a5f\u4ecb\u9762\u5361)\u8b93TE2\u652f\u63f4isdn\u529f\u80fd,\u4e26\u5c07\u4ecb\u9762\u8f49\u6210s\/t\u4ecb\u9762,\u5728\u4ee5s\/t\u4ecb\u9762\u65bcNT1\u76f8\u9023
ps:s\u4ecb\u9762\u70ba4\u7dda\u5f0f,\u4f5c\u70ba\u6578\u4f4d\u8207\u985e\u6bd4\u4e4b\u9593\u8f49\u63db\u7684\u4ecb\u9762,\u4ecb\u65bcNT2\u548cisdn terminal<\/p>\n\n\n\n
\u5be6\u9ad4\u5c64 ISDN standarts(ITU-T) B-ISDN(Brodband Intergred Service Ddgital Network) ISDN(integrated services digit …<\/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-835","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\/835","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=835"}],"version-history":[{"count":0,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/posts\/835\/revisions"}],"wp:attachment":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/media?parent=835"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/categories?post=835"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/tags?post=835"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
2\u7a2e\u901a\u9053:
B\u901a\u9053(\u627f\u8f09) \u7528\u65bc\u6578\u64da\u548c\u8a9e\u97f3\u8996\u8a0a\u4fe1\u606f,\u591a\u500bb\u901a\u9053\u53ef\u5408\u4f75\u6210\u4e00\u500b
D\u901a\u9053(Delta) \u7528\u65bc\u4fe1\u865f\u548c\u63a7\u5236 (\u4e5f\u80fd\u7528\u65bc\u6578\u64da)
H\u901a\u9053\uff1a\u9ad8\u8cc7\u6599\u901f\u7387,\u542bh0(384kb),h11(1536kb),h12(1920kb)
2\u7a2e\u8a2a\u554f\u65b9\u5f0f
I.430,BRI(\u57fa\u672c\u901f\u7387\u4ecb\u9762):2\u500bB\u901a\u9053(\u5404\u983b\u5bec64kbps)+D\u901a\u9053(\u983b\u5bec16kbps)\u7d44\u6210,\u4e09\u500b\u901a\u9053\u8a2d\u8a08\u62102B+D=144k
ps:\u53ef\u7528predictor\u548cstacker\u58d3\u7e2e\u80fd\u529b\u548c\u652f\u63f4multiple protocol
<\/strong>I.431,PRI(\u4e3b\u901f\u7387\u4ecb\u9762):<\/strong> \u591aB\u901a\u9053+D\u901a\u9053(\u983b\u5bec64Kbps)\uff0cB\u901a\u9053\u7684\u6578\u91cf\u53d6\u6c7a\u65bc\u4e0d\u540c\u7684\u570b\u5bb6
\u5317\u7f8e\u548c\u65e5\u672c: 23B+1D, \u7e3d\u4f4d\u901f\u73871.544 Mbit\/s (T1)
\u6b50\u6d32\uff0c\u6fb3\u5927\u5229\u4e9e\uff1a30B+1D,\u7e3d\u4f4d\u901f\u73872.048 Mbit\/s (E1)
\u8cc7\u6599\u93c8\u7d50\u5c64
B-channel:LAPB\u6216\u5176\u4ed6
D-channel:LAPD
\u7db2\u8def\u5c64
B-channel:X.25\u6216\u5176\u4ed6
D-channel:Q.931\u547c\u53eb\u63a7\u5236<\/p>\n\n\n\n
e-series:telphone,network \u8a0e\u8ad6\u5982\u4f55\u5728\u65e2\u6709\u7684\u96fb\u8a71\u7db2\u8def\u4e0a\u4f7f\u7528isdn
i-series:concept,\u8655\u7406\u89c0\u5ff5,\u89c0\u9ede,\u670d\u52d9
\u3000i.430
\u3000i.431
q-series:switching,signaling,call setup,teardown,\u8a0e\u8ad6\u4ea4\u63db\u8207\u4fe1\u865f,\u5305\u62ec
\u3000q.921:\u63cf\u8ff0osi2\u7684LAPD
\u3000q.931:\u898f\u5b9a\u53c3\u8003osi3 ISDN network layer<\/p>\n\n\n\n
\u65bc\u55ae\u4e00\u7db2\u8def\u4e0a\u540c\u6642\u63d0\u4f9b\u591a\u7a2e\u8cc7\u6599\u578b\u614b\u4e4b\u9ad8\u901f\u50b3\u9001\uff0c\u5982\u6578\u64da\u3001\u8a9e\u97f3\u3001\u5f71\u8996\u8a0a\u7b49\uff0c\u63d0\u4f9b\u7528\u6236\u5404\u7a2e\u670d\u52d9\u8207\u61c9\u7528\uff0c\u80fd\u4fdd\u8b49\u9023\u7dda\u4e4b\u670d\u52d9\u54c1\u8cea\u3002
\u63d0\u4f9b\u591a\u7a2e\u50b3\u9001\u901f\u7387\uff0c\u59821.544Mbps\u300125Mbps\u300145Mbps\u3001100Mbps\u3001155Mbps\u7b49\uff0c
\u63d0\u4f9b\u9023\u7dda\u5c0e\u5411\u8207\u975e\u9023\u7dda\u5c0e\u5411\u5169\u7a2e\u65b9\u5f0f\u4f86\u8b93\u7528\u6236\u4f7f\u7528\u5404\u7a2e\u61c9\u7528\u6642\u4e4b\u9078\u64c7
\u8f03\u5f48\u6027\u9023\u7dda\u65b9\u5f0f\u53ef\u63d0\u4f9bPVC\u8207SVC
ATM\u6280\u8853\u5df2\u88abITU\u9078\u70ba\u5be6\u4f5cB-ISDN\u7db2\u8def\u4e4b\u50b3\u9001\u6a21\u5f0f\uff0c\u5176\u5c07\u505a\u70baB-ISDN\u7db2\u8def\u4e2d\u8f49\u63db\u3001\u591a\u5de5\u8207\u50b3\u8f38\u6280\u8853\u4e4b\u57fa\u790e<\/p>\n","protected":false},"excerpt":{"rendered":"