\u767c\u5c55\u4f4f\u5b85VoIP\u9598\u9053\u5668 VoIP\u7cfb\u7d71\u5c64\u7d1a\u8207\u96fb\u8a71\u4ecb\u9762\u4ecb\u7d39<\/p>\n
\u3010T Y Chan\u7b49\u4e09\u4f4d\u3011 \t2005.02<\/p>\n
\u96d6\u7136VoIP\u7522\u54c1\u5728\u5e02\u5834\u51fa\u73fe\u5df2\u8d85\u904e\u4e03\u5e74\uff0c\u4f46Vonage\u3001 AT&T\u3001Sprint\u548c\u5176\u5b83\u670d\u52d9\u4f9b\u61c9\u5546\u5728\u6700\u8fd1\u6240\u505a\u7684\u5ba3\u4f48\u5f15\u8d77\u5f88\u5927\u9a37\u52d5\uff0c\u4f7f\u5f97\u6d88\u8cbb\u6027\u8a2d\u5099\u88fd\u9020\u5546\u7af6\u76f8\u63a8\u51fa\u4f4f\u5b85VoIP\u9598\u9053\u5668\u7522\u54c1\u3002\u672c\u6587\u5373\u91dd\u5c0d VoIP\u4f4f\u5b85\u9598\u9053\u5668\u7522\u54c1\u7684\u6240\u6709\u4e3b\u8981\u90e8\u4efd\uff0c\u8a73\u7d30\u8aaa\u660e\u5b83\u5011\u7684\u8a2d\u8a08\u8003\u91cf\uff0c\u4e26\u4ecb\u7d39\u4eca\u65e5VoIP\u4f4f\u5b85\u9598\u9053\u5668\u5e38\u898b\u7684\u4e3b\u8981\u7d44\u4ef6\u529f\u80fd\uff0c\u9ad8\u54c1\u8ceaVoIP\u901a\u8a71\u6240\u5fc5\u5099\u7684\u95dc\u9375\u8981\u7d20\uff0c\u7279\u5225\u662f\u96fb\u8a71\u96fb\u8def\u7684\u67d0\u4e9b\u8a2d\u8a08\u8003\u91cf\uff0c\u4ee5\u53ca\u6982\u8981\u4ecb\u7d39\u5b89\u5168\u3001\u8cc7\u6599\u8def\u7531\u548cQoS\u76e3\u6e2c\u7b49\u8981\u7d20\uff0c\u4f7f\u5176\u80fd\u63d0\u4f9b\u66f4\u6df1\u5165\u7684\u8a2d\u8a08\u5206\u6790\u3002<\/p>\n
<\/p>\n
\u4f4f\u5b85VoIP\u9598\u9053\u5668\u70ba\u4f4e\u6210\u672c\u88dd\u7f6e\uff0c\u591a\u534a\u662f\u7368\u7acb\u5f0f\u6a5f\u7a2e\uff0c\u5b83\u5011\u6703\u900f\u904e\u5bec\u983b\u6578\u64da\u6a5f\u70ba\u50b3\u7d71\u96fb\u8a71\u7cfb\u7d71(POTS)\u63d0\u4f9bVoIP\u529f\u80fd\u3002\u5728TMD\/\u985e\u6bd4POTS\u4e16\u754c\uff0c\u548c\u4ee5IP\u70ba\u4e2d\u5fc3\u3001\u4ee5\u5c01\u5305\u70ba\u57fa\u790e\u7684\u7db2\u969b\u7db2\u8def\u4e16\u754c\u9593\uff0c\u5b83\u5011\u626e\u6f14\u8457\u6a4b\u6a11\u7684\u89d2\u8272\u3002<\/p>\n
\u5c31\u50cf\u662f\u5927\u591a\u6578\u7684\u6d88\u8cbb\u6027\u7522\u54c1\uff0c\u5b83\u5011\u7684\u8a2d\u8a08\u4eba\u54e1\u5e38\u9808\u6eff\u8db3\u56b4\u82db\u7684\u7522\u54c1\u6210\u672c\u76ee\u6a19\u4ee5\u53ca\u7dca\u8feb\u7684\u767c\u5c55\u6642\u7a0b\u8981\u6c42\u3002\u7522\u54c1\u529f\u80fd\u63a1\u8cfc\u55ae\u901a\u5e38\u4e0d\u53ea\u5305\u542b\u57fa\u672cVoIP\u9598\u9053\u5668\u529f\u80fd\uff0c\u5176\u5b83\u8f14\u52a9\u529f\u80fd\u4e5f\u6703\u5217\u65bc\u5176\u4e2d\uff0c\u4f8b\u5982\u666e\u901a\u4f4f\u5b85\u8def\u7531\u5668\u5e38\u898b\u7684\u8cc7\u6599\u6a4b\u63a5\u548c\u8def\u7531\u529f\u80fd\u3001\u8a9e\u97f3\u52a0\u5bc6\u548cIPSec\u7b49\u65b0\u51fa\u73fe\u7684\u8a9e\u97f3\u548c\u4fe1\u4ee4\u5b89\u5168\u529f\u80fd\u3001\u4ee5\u53ca\u70ba\u4f4f\u5b85VoIP\u670d\u52d9\u63d0\u4f9b\u6545\u969c\u6392\u9664\u548c\u4f8b\u884c\u7dad\u8b77\u6240\u9700\u7684\u7db2\u8def\u9023\u7dda\u54c1\u8cea(QoS)\u529f\u80fd\u3002<\/p>\n
\u7cfb\u7d71\u5c64\u7d1a\u6982\u8ff0 \u6a21\u64ec\u50b3\u7d71\u96fb\u8a71\u7cfb\u7d71<\/p>\n
\u5927\u90e8\u4efd\u73fe\u6709\u624b\u6a5f\u4ecd\u662fPOTS\u7522\u54c1\uff0c\u56e0\u6b64\u7528\u6236\u7aef\u8a2d\u5099\u64a5\u51fa\u7684\u591a\u6578VoIP\u96fb\u8a71\u90fd\u4f86\u81ea\u65bc\u8a9e\u97f3\u9598\u9053\u5668\u9023\u63a5\u7684POTS\u8a71\u6a5f\u3002\u81f3\u65bc\u9060\u7aef\u8a2d\u5099\u5247\u53ef\u80fd\u662f\u53e6\u4e00\u90e8VoIP\u7528\u6236\u7aef\u88dd\u7f6e\u6216\u9023\u63a5\u81f3\u516c\u773e\u96fb\u8a71\u4ea4\u63db\u7db2\u8def(PSTN)\u7684POTS\u96fb\u8a71(\u57161)\u3002<\/p>\n
\u7576\u7136\uff0c\u7531\u65bc\u6d88\u8cbb\u8005\u65e9\u5df2\u7d93\u7fd2\u6163\u73fe\u6709\u7684POTS\u7cfb\u7d71\uff0c\u56e0\u6b64\u4efb\u4f55VoIP\u7cfb\u7d71\u82e5\u662f\u60f3\u8981\u6210\u529f\uff0c\u9996\u5148\u5c31\u5fc5\u9808\u63d0\u4f9b\u8207\u5176\u76f8\u540c\u7684\u4f7f\u7528\u7d93\u9a57\u3002\u8981\u8907\u88fdPSTN\u7cfb\u7d71\u63d0\u4f9b\u7684\u50b3\u7d71\u4f7f\u7528\u8005\u4ecb\u9762\uff0c\u64a5\u865f\u97f3\u7684\u7522\u751f\u548c\u5075\u6e2c\u529f\u80fd\u5c31\u8b8a\u5f97\u4e0d\u53ef\u6216\u7f3a\uff0c\u5b83\u5fc5\u9808\u80fd\u5920\u6b63\u78ba\u5206\u8fa8\u4f7f\u7528\u8005\u64a5\u6253\u7684\u865f\u78bc\uff0c\u7136\u5f8c\u5728\u63a5\u6536\u7aef\u91cd\u65b0\u7522\u751f\u9019\u4e9b\u865f\u78bc\uff0c\u4ee5\u4fbf\u6210\u529f\u5730\u57f7\u884c\u901a\u8a71\u7a0b\u5e8f\u3002<\/p>\n
\u4e0d\u50c5\u9023\u7dda\u6642\u9700\u8981\u7522\u751f\u548c\u5075\u6e2c\u64a5\u865f\u97f3\uff0c\u70ba\u4e86\u56e0\u61c9\u8a9e\u97f3\u90f5\u4ef6\u548c\u96fb\u8a71\u5361\u7b49\u64a5\u865f\u97f3\u9a45\u52d5\u5f0f\u529f\u80fd\uff0c\u5728\u901a\u8a71\u904e\u7a0b\u4e2d\u4e5f\u5fc5\u9808\u8655\u7406\u64a5\u865f\u97f3\u7684\u7522\u751f\u548c\u5075\u6e2c\uff0c\u56e0\u6b64VoIP \u8655\u7406\u529f\u80fd\u9084\u8981\u63d0\u4f9b\u9069\u7576\u7684\u652f\u63f4\uff0c\u4f7f\u5176\u80fd\u65bc\u983b\u5e36\u5167(in-band)\u6b63\u78ba\u5730\u50b3\u9001\u96d9\u97f3\u8907\u983b(DTMF)\u64a5\u865f\u97f3\u3002\u7136\u800c\u5177\u5099\u8cc7\u6599\u58d3\u7e2e\u529f\u80fd\u7684\u8a9e\u97f3\u7de8\u78bc\u5668\u537b\u53ef\u80fd\u5c0e\u81f4\u64a5\u865f\u97f3\u5931\u771f\uff0c\u70ba\u4e86\u907f\u514d\u9019\u7a2e\u53ef\u80fd\u51fa\u73fe\u7684\u8a0a\u865f\u5931\u771f\uff0c\u8a2d\u8a08\u4eba\u54e1\u5229\u7528\u4f4e\u4f4d\u5143\u7387\u7684\u8a9e\u97f3\u7de8\u78bc\u5668\u4f86\u8655\u7406\u64a5\u865f\u97f3\u6642\uff0c\u5c31\u5fc5\u9808\u6c42\u52a9\u65bc\u66f4\u5148\u9032\u7684\u6280\u8853\uff0c\u4f8b\u5982\u5c08\u9580\u652f\u63f4\u96d9\u983b\u8907\u983b\u8a0a\u865f\u4e2d\u7e7c\u50b3\u8f38\u7684IETF RFC2833\u6a19\u6e96\u3002\u9664\u6b64\u4e4b\u5916\uff0c\u5931\u771f\u64a5\u865f\u97f3\u7684\u9084\u539f\u4ee5\u53ca\u64a5\u865f\u904e\u7a0b\u97f3\u7684\u63d0\u4f9b\u90fd\u9700\u8981\u64a5\u865f\u97f3\u7522\u751f\u529f\u80fd\uff0c\u64a5\u865f\u97f3\u7684\u5075\u6e2c\u4ee5\u53ca\u9069\u7576\u7684\u50b3\u771f\u548c\u8cc7\u6599\u6578\u64da\u6a5f\u8a0a\u865f\u5207\u63db\u80fd\u529b\u4e5f\u4e0d\u53ef\u6216\u7f3a\uff0c\u56e0\u70ba\u6211\u5011\u5fc5\u9808\u652f\u63f4PSTN\u76ee\u524d\u63d0\u4f9b\u7684\u6240\u6709\u96fb\u8a71\u8a2d\u5099\u3002<\/p>\n
\u56de\u97f3\u8655\u7406<\/p>\n
\u50b3\u7d71POTS\u7db2\u8def\u5fc5\u7136\u6703\u51fa\u73fe\u56de\u97f3\uff0cPSTN\u5247\u6703\u5728\u7cfb\u7d71\u5404\u500b\u90e8\u4efd\u63a1\u7528\u56de\u97f3\u6d88\u9664\u96fb\u8def\u3002\u7576\u7dda\u8def\u5fc5\u9808\u5f9e4\u7dda\u96fb\u8def\u8f49\u63db\u81f32\u7dda\u96fb\u8a71\u6df7\u5408\u96fb\u8def\u6642\uff0c\u7dda\u8def\u56de\u97f3\u5c31\u6703\u51fa\u73fe\u3002\u96fb\u8a71\u7db2\u8def\u7522\u751f\u7684\u56de\u97f3\u6703\u64f4\u6563\u81f3\u5c01\u5305\u7db2\u8def\u3002<\/p>\n
\u6839\u64daPSTN\u898f\u683c\u8981\u6c42\uff0c\u5ef6\u9072\u6642\u9593\u8d85\u904e50\u6beb\u79d2\u5c31\u5fc5\u9808\u63d0\u4f9b\u56de\u97f3\u6d88\u9664\u529f\u80fd\uff0c\u4f46\u7531\u65bcVoIP\u89e3\u6c7a\u65b9\u6848\u7684IP\u7db2\u8def\u90e8\u4efd\u5fc5\u7136\u6703\u8b93\u5168\u7a0b\u5ef6\u9072\u6642\u9593\u589e\u52a050\u6beb\u79d2\u4ee5\u4e0a\uff0c\u56e0\u6b64\u7576VoIP\u89e3\u6c7a\u65b9\u6848\u9023\u63a5\u81f3PSTN\u7db2\u8def\u6642\uff0c\u7dda\u8def\u56de\u97f3\u6d88\u9664\u5c31\u8b8a\u6210\u4e0d\u53ef\u6216\u7f3a\u7684\u529f\u80fd\u3002\u70ba\u9054\u6210\u9019\u9805\u8981\u6c42\uff0c\u57162\u6240\u793a\u7684\u56de\u97f3\u6d88\u9664\u96fb\u8def\uff0c\u6703\u5c0d\u63a5\u6536\u81ea\u548c\u50b3\u9001\u5230\u5c01\u5305\u7db2\u8def\u7684\u8a9e\u97f3\u8cc7\u6599\u9032\u884c\u6bd4\u8f03\uff0c\u5728\u9032\u5165\u5c01\u5305\u7db2\u8def\u7684\u50b3\u9001\u8def\u5f91\u4e0a\u6709\u500b\u6578\u4f4d\u6ffe\u6ce2\u5668\uff0c\u5b83\u6703\u6d88\u9664\u96fb\u8a71\u7db2\u8def\u6240\u9020\u6210\u7684\u56de\u97f3\u3002<\/p>\n
\u56de\u97f3\u6d88\u9664\u7684\u5c3e\u9577\u662f\u6307\u8655\u7406\u5668\u5fc5\u9808\u6d88\u9664\u7684\u56de\u97f3\u9577\u5ea6\uff0c\u4e0d\u540c\u7684VoIP\u61c9\u7528\u5c0d\u5176\u8981\u6c42\u4e5f\u6709\u6240\u5dee\u7570\u3002\u5c3e\u9577\u7684\u8981\u6c42\u662f\u7531\u9598\u9053\u5668\u8a2d\u5099(\u4f4f\u5b85\u9598\u9053\u5668)\u548c4\u7dda\u81f32\u7dda\u8f49\u63db\u96fb\u8def\u4e4b\u9593\u7684\u8ddd\u96e2\u6c7a\u5b9a\uff0c\u5176\u7bc4\u570d\u901a\u5e38\u662f\u5f9e\u4f4f\u5b85\/SOHO\u61c9\u7528\u76848\u6beb\u79d2\u523032\u6beb\u79d2\uff0c\u96fb\u4fe1\u7b49\u7d1a\u61c9\u7528\u5c0d\u65bc\u5c3e\u9577\u7684\u8981\u6c42\u6700\u591a\u53ef\u9054128\u6beb\u79d2\u3002<\/p>\n
\u7531\u65bc\u900f\u904e\u4f4f\u5b85VoIP\u9598\u9053\u5668\u64a5\u51fa\u7684\u591a\u6578\u96fb\u8a71\u6700\u5f8c\u90fd\u6703\u9023\u63a5\u81f3PSTN\u8a2d\u5099\uff0c\u56e0\u6b64\u56de\u97f3\u6d88\u9664\u5c31\u8b8a\u6210\u5fc5\u8981\u529f\u80fd\u3002\u5c31\u4f4f\u5b85\u9598\u9053\u5668\u800c\u8a00\uff0c8\u81f316\u6beb\u79d2\u7684\u56de\u97f3\u6d88\u9664\u5c3e\u9577\u901a\u5e38\u5df2\u7d93\u8db3\u5920\uff0c\u800c\u4e14\u70ba\u4e86\u9054\u5230\u6700\u8d77\u78bc\u7684\u901a\u8a71\u54c1\u8cea\u8981\u6c42\uff0c\u56de\u97f3\u6d88\u9664\u529f\u80fd\u9084\u5fc5\u9808\u7b26\u5408ITU G.165\u4ee5\u53caG.168\u6a19\u6e96\u3002<\/p>\n
\u8a9e\u97f3\u7de8\u78bc<\/p>\n
\u985e\u6bd4\u8a0a\u865f\u81f3\u8a9e\u97f3\u5c01\u5305\u7684\u8f49\u63db\u6642\uff0c\u9700\u8981\u8a9e\u97f3\u7de8\u78bc\u7684\u529f\u80fd\uff0c\u9019\u901a\u5e38\u5305\u542b\u5c07G.711-PCM\u7de8\u78bc\u4e32\u6d41\u6240\u7522\u751f\u768464kbps\u4e32\u6d41\uff0c\u9032\u884c\u8cc7\u6599\u58d3\u7e2e\u4f86\u964d\u4f4e\u4f4d\u5143\u7387\uff0c\u4f7f\u5f97\u7db2\u8def\u548c\u7528\u6236\u7aef\u7dda\u8def\u4e4b\u9593\u7684\u8cc7\u6599\u50b3\u9001\u66f4\u6709\u6548\u7387\u3002<\/p>\n
G.729ab\u548cG.723.1\u662f\u73fe\u6709VoIP\u7cfb\u7d71\u5e38\u7528\u7684\u8a9e\u97f3\u7de8\u78bc\u5668\uff0c\u5176\u4e2dG.729ab\u8a9e\u97f3\u7de8\u78bc\u5668\u7684\u8cc7\u6599\u901f\u7387\u6700\u4f4e\u53ef\u81f38kbps\uff0cG.723.1\u5247\u70ba5.3\u548c6.3kbps\u3002\u9019\u4e9b\u4f4e\u4f4d\u5143\u7387\u8a9e\u97f3\u7de8\u78bc\u5668\u548cG.711\u5404\u6709\u512a\u7f3a\u9ede\uff0c\u524d\u8005\u80fd\u6e1b\u5c11\u983b\u5bec\u4f7f\u7528\u91cf\uff0c\u5f8c\u8005\u5247\u63d0\u4f9b\u7565\u4f73\u7684\u97f3\u8cea\u3002G.729a\u662f\u61c9\u7528\u5ee3\u6cdb\u7684G.729\u8a9e\u97f3\u58d3\u7e2e\u6f14\u7b97\u6cd5\u7684\u6700\u4f73\u5316\u5be6\u4f5c\uff0c\u5fc5\u9808\u6ce8\u610f\u7684\u662fG.729\u70ba\u57fa\u790e\u6f14\u7b97\u6cd5\uff0c\u5b83\u9084\u80fd\u8207G.729a\u76f8\u4e92\u64cd\u4f5c\u3002G.729ab\u5247\u662f\u9019\u500b\u6f14\u7b97\u6cd5\u7684\u9644\u9304B\u90e8\u4efd\uff0c\u5b83\u76f4\u63a5\u5c07\u8a9e\u97f3\u5075\u6e2c\u529f\u80fd(Voice Activity Detection\uff0cVAD)\u52a0\u5165\u8a9e\u97f3\u7de8\u78bc\u5668\u3002<\/p>\n
\u8a9e\u97f3\u5075\u6e2c<\/p>\n
\u7121\u8ad6\u5167\u5efa\u81f3\u7de8\u78bc\u89e3\u78bc\u5668\u6216\u505a\u70ba\u5916\u90e8\u8edf\u9ad4\u529f\u80fd\uff0cVoIP\u8a2d\u8a08\u90fd\u61c9\u4ee5\u53ef\u8a2d\u5b9a(\u555f\u52d5\/\u95dc\u9589)\u7684\u65b9\u5f0f\u652f\u63f4\u8a9e\u97f3\u5075\u6e2c\u548c\u76f8\u95dc\u7684\u975c\u97f3\u6291\u5236\u529f\u80fd\u3002\u8a9e\u97f3\u5075\u6e2c\u529f\u80fd\u6703\u76e3\u8996\u6240\u6536\u5230\u7684\u8a0a\u865f\uff0c\u5224\u65b7\u5176\u4e2d\u662f\u5426\u5305\u542b\u8a9e\u97f3\u8a0a\u606f\uff0c\u82e5\u5728\u4e00\u6bb5\u6642\u9593\u5167\u672a\u80fd\u5075\u6e2c\u5230\u8a9e\u97f3\u8a0a\u606f\uff0c\u8edf\u9ad4\u5c31\u6703\u66ab\u505c\u4e0d\u5fc5\u8981\u7684\u5c01\u5305\u4f5c\u696d\u548c\u96a8\u5f8c\u7684\u975c\u97f3\u50b3\u9001\u52d5\u4f5c\u3002\u9019\u9805\u529f\u80fd\u9084\u6703\u6e2c\u91cf\u96fb\u8a71\u8a2d\u5099\u4ecb\u9762\u7684\u9592\u7f6e\u96dc\u8a0a\u7279\u6027\uff0c\u7136\u5f8c\u5c07\u96dc\u8a0a\u91cf\u6e2c\u503c\u9001\u5230\u63a5\u6536\u7aef\u7684\u9598\u9053\u5668\u3002\u70ba\u4e86\u8b93\u4f7f\u7528\u8005\u77e5\u9053\u96fb\u8a71\u7dda\u8def\u66a2\u901a\uff0c\u5efa\u8b70\u4f7f\u7528\u8212\u9069\u97f3\u7522\u751f\u529f\u80fd\uff0c\u5b83\u6703\u5728\u63a5\u6536\u7aef\u64ad\u653e\u5f88\u5c0f\u7684\u80cc\u666f\u96dc\u8a0a\u3002<\/p>\n
\u4f4f\u5b85\u9598\u9053\u5668\u9084\u5fc5\u9808\u652f\u63f4\u50b3\u771f\u4e2d\u7e7c\u6280\u8853\uff0c\u5b83\u80fd\u6e1b\u5c11\u983b\u5bec\u4f7f\u7528\u91cf\uff0c\u540c\u6642\u8b93IP \u50b3\u771f\u7dda\u8def\u66f4\u5f37\u56fa\u53ef\u9760\uff0c\u56e0\u6b64\u73fe\u5df2\u6210\u70baSOHO\u548cSMB\u8a2d\u5099\u7684\u5e38\u898b\u529f\u80fd\u3002\u50b3\u771f\u4e2d\u7e7c\u529f\u80fd\u5fc5\u9808\u5c0d\u50b3\u771f\u6383\u63cf\u8cc7\u6599\u9032\u884c\u89e3\u8abf\uff0c\u5c07\u5176\u5c01\u88dd\u6210IP\u5c01\u5305\uff0c\u518d\u7531\u63a5\u6536\u7aef\u9598\u9053\u5668\u5c07\u50b3\u771fIP\u5c01\u5305\u89e3\u8abf\u9084\u539f\u3002\u8981\u63d0\u4f9b\u9019\u4e9b\u529f\u80fd\uff0c\u5c31\u5fc5\u9808\u652f\u63f4\u50b3\u771f\u6a5f\u548cVoIP\u9598\u9053\u5668\u4e4b\u9593\u7684T.30\u50b3\u771f\u5354\u5b9a\uff0c\u4ee5\u53caIP\u50b3\u8f38\u6240\u9700\u7684T.38\u50b3\u771fIP\u5206\u5c01\u5305\u88dd\u5354\u5b9a\u3002<\/p>\n
POTS\u4ecb\u9762<\/p>\n
\u4f4f\u5b85VoIP\u9598\u9053\u5668\u6703\u5229\u7528\u8108\u885d\u7de8\u78bc\u8abf\u8b8a(PCM)\u4ecb\u9762\u7684FXS \u4fe1\u4ee4\u8207\u50b3\u7d71\u96fb\u8a71\u8a2d\u5099\u6e9d\u901a\uff0c\u8a72\u4ecb\u9762\u6703\u63a5\u6536\u985e\u6bd4\u7de8\u78bc\u89e3\u78bc\u5668\u4ecb\u9762\u6240\u9001\u51fa\u7684PCM\u53d6\u6a23\u503c\uff0c\u518d\u628a\u5b83\u5011\u8f49\u9001\u7d66\u9069\u7576\u529f\u80fd\u3002\u9664\u6b64\u4e4b\u5916\uff0c\u9019\u500b\u4ecb\u9762\u9084\u6703\u5c07DSP\u8655\u7406\u5b8c\u6210\u7684 PCM\u53d6\u6a23\u503c\u8f49\u9001\u7d66\u6578\u4f4d\u4ecb\u9762\u3002\u9019\u500bPCM\u4ecb\u9762\u9084\u6703\u5c0d\u8f38\u51fa\u53d6\u6a23\u503c\u6301\u7e8c\u9032\u884c\u518d\u53d6\u6a23\uff0c\u907f\u514d\u53d6\u6a23\u503c\u6f0f\u5931\u3002<\/p>\n
\u64ad\u653e<\/p>\n
\u8a9e\u97f3\u548c\u50b3\u771f\u53d6\u6a23\u503c\u8655\u7406\u5b8c\u6210\u5f8c\uff0c\u5c31\u9808\u5c07\u5b83\u5011\u5206\u5c01\u5305\u88dd\u3002VoIP\u7cfb\u7d71\u901a\u5e38\u63a1\u7528\u5373\u6642\u5c01\u5305\uff0c\u6240\u4ee5\u63a5\u6536\u7aef\u9700\u8981\u4e00\u500b\u8a9e\u97f3\u64ad\u653e\u55ae\u5143\u505a\u70ba\u63a5\u6536\u8a9e\u97f3\u5c01\u5305\u7684\u7de9\u885d\u5668\uff0c\u7136\u5f8c\u5c07\u5b83\u5011\u8f49\u9001\u7d66\u8a9e\u97f3\u7de8\u78bc\u5668\u4ee5\u4fbf\u64ad\u653e\u7d66\u4f7f\u7528\u8005\u3002\u9019\u500b\u64ad\u653e\u55ae\u5143\u9084\u540c\u6642\u64d4\u4efb\u6296\u52d5\u7de9\u885d\u5668\u548c\u7ba1\u7406\u5668\uff0c\u5b83\u80fd\u8b93\u591a\u500b\u5c01\u5305\u4f9d\u5e8f\u7b49\u5f85\u8655\u7406\uff0c\u907f\u514d\u767c\u751f\u8cc7\u6599\u4e0d\u8db3\u6216\u8cc7\u6599\u6ea2\u51fa\u7684\u73fe\u8c61\u3002<\/p>\n
\u529f\u80fd\u5be6\u4f5c<\/p>\n
\u524d\u8ff0\u529f\u80fd\u591a\u534a\u7531\u8edf\u9ad4\u63d0\u4f9b\uff0c\u800c\u4e14\u5927\u90fd\u5728DSP\u5be6\u4f5c\u3002\u5b83\u5011\u4e5f\u80fd\u7531RISC\u8655\u7406\u5668\u63d0\u4f9b\uff0c\u4f46\u53ea\u6709\u5728\u5178\u578bRISC\u529f\u80fd\u9700\u8981\u6700\u5c11\u7684\u904b\u7b97\u8655\u7406\u6642\uff0c\u9019\u7a2e\u505a\u6cd5\u624d\u986f\u5f97\u5408\u9069\u3002\u5c0d\u65bc\u53ea\u63a1\u7528RISC\u8655\u7406\u5668\u7684VoIP\u67b6\u69cb\uff0c\u53ef\u4f9b\u4f7f\u7528\u7684\u8655\u7406\u5668\u9031\u671f(MIPS)\u5fc5\u9808\u8b39\u614e\u7ba1\u7406\uff0c\u4e26\u4ee5\u6700\u9069\u7576\u7684\u65b9\u5f0f\u5206\u914d\u7d66\u8a9e\u97f3\u8655\u7406\u4ee5\u53ca\u7db2\u8def\/\u96fb\u8a71\u8a0a\u865f\u8655\u7406\u3002<\/p>\n
\u5c01\u5305\u548c\u96fb\u8a71\u7db2\u8def\u4fe1\u4ee4<\/p>\n
\u628a\u96fb\u8a71\u8a0a\u865f\u8f49\u63db\u6210\u5c01\u5305\u53ea\u662fVoIP\u9598\u9053\u5668\u89e3\u6c7a\u65b9\u6848\u7684\u4e00\u90e8\u4efd\uff0c\u9598\u9053\u5668\u9084\u5fc5\u9808\u652f\u63f4\u96fb\u8a71\u63a7\u5236\u8a0a\u865f\uff0c\u4f8b\u5982\u96fb\u8a71\u7684\u639b\u65b7\u548c\u63a5\u807d\u529f\u80fd\uff0c\u9084\u6709\u7db2\u8def\u63a7\u5236\u8a0a\u865f\u548cSession Initiated Protocol(SIP)\u4e4b\u985e\u7684\u901a\u8a0a\u5354\u5b9a\uff0c\u9019\u5169\u985e\u529f\u80fd\u5c0d\u65bc\u4e3b\u6a5f\u8655\u7406\u5668\u548c\u8edf\u9ad4\u6709\u8457\u6975\u70ba\u4e0d\u540c\u7684\u8981\u6c42\u3002\u7121\u8ad6\u8981\u5c07\u96fb\u8a71\u8a0a\u865f\u548c\u5354\u5b9a\u8f49\u63db\u6210\u5c01\u5305\u5354\u5b9a\uff0c\u6216\u662f\u53cd\u904e\u4f86\uff0c\u5176\u904e\u7a0b\u90fd\u727d\u6d89\u5230\u8a31\u591a\u8655\u7406\u4f5c\u696d\uff0c\u800c\u4e14\u9019\u4e9b\u4f5c\u696d\u901a\u5e38\u6703\u7531RISC\u8655\u7406\u5668\u57f7\u884c\u3002<\/p>\n
\u985e\u6bd4\u96fb\u8a71\u548cPSTN\u4ecb\u9762<\/p>\n
\u591a\u6578\u61c9\u7528\u6703\u4ee5\u985e\u4f3c\u65bc\u72c0\u614b\u6a5f\u5668\u7684\u8edf\u9ad4\u670d\u52d9\u505a\u70ba\u901a\u8a71\u63a7\u5236\u5668\uff0c\u5c08\u9580\u8655\u7406\u9019\u4e9b\u529f\u80fd(\u57163)\u3002\u5728\u9598\u9053\u5668\u4e2d\uff0c\u9019\u500b\u901a\u8a71\u63a7\u5236\u5668\u6703\u5728\u6bcf\u4e00\u901a\u96fb\u8a71\u7684\u67d0\u500b\u968e\u6bb5\u57f7\u884c\u9019\u4e9b\u5fc5\u8981\u529f\u80fd\u3002\u7db2\u8def\u5354\u5b9a\u5806\u758a\u5247\u662f\u4fe1\u4ee4\u8655\u7406\u7684\u53e6\u4e00\u9805\u95dc\u9375\u8981\u7d20\uff0cSIP\u662f\u4f4f\u5b85\u9598\u9053\u5668\u5e02\u5834\u975e\u5e38\u6d41\u884c\u7684\u4e00\u7a2e\u5354\u5b9a\uff0c\u4f46\u4e5f\u6709\u8a31\u591a\u7522\u54c1\u63a1\u7528MGCP\u4ee5\u53caH.323\u5354\u5b9a\u3002<\/p>\n
\u589e\u6dfb\u670d\u52d9\u548c\u8a2d\u5099\u914d\u7f6e<\/p>\n
\u4f4f\u5b85\u61c9\u7528\u6240\u4f7f\u7528\u7684VoIP\u9598\u9053\u5668\u9808\u652f\u63f4\u4eca\u65e5\u96fb\u8a71\u670d\u52d9\u5e38\u898b\u7684\u5404\u7a2e\u529f\u80fd\uff0c\u5305\u62ec\u8a71\u4e2d\u63d2\u63a5\u3001\u6307\u5b9a\u8f49\u63a5\u3001\u7559\u8a00\u6307\u793a\u8a0a\u865f\u548c\u96fb\u8a71\u8f49\u63a5\uff0c\u7cfb\u7d71\u9700\u8981\u9069\u7576\u8edf\u9ad4\u4f86\u89e3\u8b6f\u9019\u4e9b\u7db2\u8def\u50b3\u4f86\u7684\u547d\u4ee4\uff0c\u4e26\u4e14\u7d93\u7531\u9598\u9053\u5668\u5230\u96fb\u8a71\u4e0a\u57f7\u884c\u9019\u9805\u529f\u80fd\u3002<\/p>\n
\u505a\u70ba\u670d\u52d9\u4f9b\u61c9\u5546\u7db2\u8def\u7684\u9060\u7aef\u88dd\u7f6e\uff0c\u4f4f\u5b85\u9598\u9053\u5668\u9808\u80fd\u5728\u73fe\u5834\u6216\u5f9e\u9060\u65b9\u8a2d\u5b9a\u5176\u7d44\u614b\uff0c\u4e14\u5176\u904e\u7a0b\u4e0d\u9700\u7368\u7acb\u7684\u76e3\u8996\u5668\u6216\u5176\u5b83\u8a2d\u5099\u3002\u8981\u652f\u63f4\u9019\u7a2e\u7d44\u614b\u8a2d\u5b9a\uff0c\u9598\u9053\u5668\u9808\u63d0\u4f9b\u9069\u7576\u8edf\u9ad4\u4f86\u63a5\u53d7\u548c\u8655\u7406\u9019\u9805\u914d\u7f6e\u8981\u6c42\uff0c\u4f7f\u7528\u8005\u4ecb\u9762\u4e5f\u61c9\u7c21\u55ae\u6613\u7528\uff0c\u9019\u985e\u8a2d\u5099\u914d\u7f6e\u8edf\u9ad4\u7684\u8a2d\u8a08\u4e26\u975e\u6613\u4e8b\u3002\u53e6\u5916\uff0c\u5e02\u5834\u9084\u5e0c\u671b\u4f4f\u5b85\u9598\u9053\u5668\u63d0\u4f9b\u96d9\u93e1\u50cf(\u7a0b\u5f0f\u8ca0\u8f09)\u5132\u5b58\u80fd\u529b\uff0c\u8b93\u66f4\u65b0\u7a0b\u5f0f\u80fd\u5920\u76f4\u63a5\u4e0b\u8f09\u81f3\u9598\u9053\u5668\uff0c\u4e0d\u9700\u8981\u522a\u9664\u73fe\u6709\u7684\u93e1\u50cf\uff0c\u9019\u6703\u5f71\u97ff\u6574\u9ad4\u7684\u8edf\u9ad4\u7a0b\u5f0f\u8a2d\u8a08\u4ee5\u53caFLASH\u548cSDRAM\u9700\u6c42\u3002\u9664\u6b64\u4e4b\u5916\uff0c\u6211\u5011\u4e5f\u4e0d\u61c9\u5ffd\u7565\u88dd\u7f6e\u9a45\u52d5\u7a0b\u5f0f\u3001\u4e59\u592a\u7db2\u8def\u4ecb\u9762\u3001\u5373\u6642\u4f5c\u696d\u7cfb\u7d71\u548cIP\u5806\u758a\u3002<\/p>\n
\u820a\u578b\u985e\u6bd4\u96fb\u8a71\u9700\u8981FXS(Foreign Exchange Station)\u624d\u80fd\u9023\u81f3\u8a9e\u97f3\u9598\u9053\u5668(\u57164)\uff0c\u67d0\u4e9b\u61c9\u7528\u5247\u9700\u8981FXO(Foreign Exchange Office)\u7dda\u8def\u624d\u80fd\u4f7f\u7528PSTN\u5c0d\u5916\u64a5\u865f(\u57165)\u3002FXS\u5305\u542b\u5169\u500b\u90e8\u4efd\uff0c\u5206\u5225\u662f\u7de8\u78bc\u89e3\u78bc\u5668\u548c\u7528\u6236\u7dda\u8def\u4ecb\u9762\u96fb\u8def(Subscriber Line Interface Circuit\uff0cSLIC)\u3002<\/p>\n
\u8a9e\u97f3\u9598\u9053\u5668\u7684\u7528\u6236\u7aef\u88dd\u7f6e\u9700\u8981FXO\u4ecb\u9762\u624d\u80fd\u9023\u63a5\u81f3\u7576\u5730\u7684\u96fb\u8a71\u516c\u53f8(\u57165)\u3002FXO\u5305\u542b\u7de8\u78bc\u89e3\u78bc\u5668\u548cDAA(Data Access Arrangement)\uff0c\u7de8\u78bc\u89e3\u78bc\u5668\u7684\u529f\u80fd\u548c\u5b83\u5728FXS\u6642\u5b8c\u5168\u76f8\u540c\uff0cDAA\u5247\u6703\u6a21\u64ecPOTS\uff0c\u5176\u4e3b\u8981\u529f\u80fd\u662f\u9664\u53bb\u9ad8\u58d3\u76f4\u6d41\u504f\u58d3\u3002DAA\u6703\u5728PSTN\u7aef\u5f62\u6210\u9589\u8ff4\u8def\uff0c\u4f7f\u5f97PSTN\u7cfb\u7d71\u9001\u4f86\u7684\u8a0a\u865f\u4e2d\uff0c\u53ea\u6709\u985e\u6bd4\u4ea4\u6d41\u8a0a\u865f\u80fd\u5920\u901a\u904e\u3002<\/p>\n
\u8a9e\u97f3\u9598\u9053\u5668\u7684\u8cc7\u6599\u529f\u80fd<\/p>\n
\u5728\u7528\u6236\u7aef\u8a2d\u5099\u7684\u4f4f\u5b85\u61c9\u7528\u4e2d\uff0c\u8a9e\u97f3\u9598\u9053\u5668\u901a\u5e38\u6703\u9023\u63a5\u81f3\u5bec\u983b\u6578\u64da\u6a5f\u7684\u5340\u57df\u7db2\u8def\u7aef\uff0c\u82e5\u4f7f\u7528\u8005\u5bb6\u88e1\u6709\u4e00\u90e8\u4ee5\u4e0a\u7684\u500b\u4eba\u96fb\u8166\uff0c\u8a9e\u97f3\u9598\u9053\u5668\u5c31\u6709\u53ef\u80fd\u662f\u7368\u7acb\u5f0f\u88dd\u7f6e\uff0c\u7531\u5b83\u9023\u63a5\u53e6\u4e00\u90e8\u8def\u7531\u5668\u6216\u96c6\u7dda\u5668\uff0c\u505a\u70baIP \u9023\u7dda\u7684\u7d42\u9ede\u3002\u82e5\u4f7f\u7528\u8005\u5bb6\u88e1\u53ea\u6709\u4e00\u90e8\u500b\u4eba\u96fb\u8166\uff0c\u90a3\u9ebc\u96a8\u8457\u8a9e\u97f3\u9598\u9053\u5668\u7684\u52a0\u5165\uff0c\u4f7f\u7528\u8005\u5fc5\u9808\u5148\u67b6\u8a2d\u5bb6\u5ead\u7db2\u8def\uff0c\u540c\u6642\u518d\u63a1\u8cfc\u8def\u7531\u5668\u6216\u96c6\u7dda\u5668\u3002\u8981\u8b93\u5c01\u5305\u8a9e\u97f3\u670d\u52d9\u7684\u61c9\u7528\u66f4\u7c21\u55ae\uff0c\u6700\u5408\u9069\u7684\u8a9e\u97f3\u9598\u9053\u5668\u7d44\u614b\u662f\u589e\u52a0\u8cc7\u6599\u8def\u7531\u529f\u80fd\uff0c\u7531\u5b83\u9023\u63a5\u81f3\u53e6\u4e00\u90e8\u500b\u4eba\u96fb\u8166\uff1b\u6b64\u6642\u6578\u64da\u6a5f\u6703\u9023\u81f3\u5bec\u983b\u6578\u64da\u6a5f\u7684\u5ee3\u57df\u7db2\u8def\u7aef\uff0c\u500b\u4eba\u96fb\u8166\u5247\u9023\u81f3\u5340\u57df\u7db2\u8def\u7aef\u3002\u82e5\u63a1\u7528\u9019\u7a2e\u7d44\u614b\u914d\u7f6e\u65b9\u5f0f\uff0c\u8a9e\u97f3\u9598\u9053\u5668\u5c31\u61c9\u8a72\u5305\u542b\u8cc7\u6599\u8def\u7531\u529f\u80fd\u3002<\/p>\n
\u77ad\u89e3\u5bec\u983b\u9023\u7dda\u7684\u61c9\u7528\u548c\u7d44\u614b\u914d\u7f6e\u5c0d\u65bc\u8cc7\u6599\u529f\u80fd\u548c\u6548\u80fd\u7684\u6c7a\u5b9a\u6703\u6709\u5f88\u5927\u5e6b\u52a9\u3002\u9664\u4e86VDSL\u4e4b\u5916\uff0c\u591a\u6578\u4f4f\u5b85\u5bec\u983b\u6578\u64da\u6a5f\u7684\u50b3\u8f38\u5bb9\u91cf\u90fd\u5c0f\u65bc50Mbps\uff0c\u56e0\u6b64\u8a2d\u8a08\u8a9e\u97f3\u9598\u9053\u5668\u6642\uff0c\u5fc5\u9808\u5148\u77ad\u89e3\u6700\u7d42\u4f7f\u7528\u8005\u7684\u61c9\u7528\uff0c\u7136\u5f8c\u624d\u80fd\u6c7a\u5b9a\u9069\u7576\u7684\u50f9\u683c\u548c\u6548\u80fd\u76ee\u6a19\u3002\u9019\u4e9b\u9598\u9053\u5668\u61c9\u8a72\u63d0\u4f9b\u7684\u90e8\u4efd\u529f\u80fd\u5305\u62ec\uff1a<\/p>\n
\u2027\u8def\u7531<\/p>\n
\u2027NAT\u3001NAPT\u3001\u52d5\u614b\u548c\u975c\u614b<\/p>\n
\u2027\u9632\u706b\u7246<\/p>\n
\u2027DHCP\u7528\u6236\/\u4f3a\u670d\u5668<\/p>\n
\u2027PPPoE<\/p>\n
\u2027TFTP<\/p>\n
\u9664\u6b64\u4e4b\u5916\uff0c\u5c07\u8a9e\u97f3\u9598\u9053\u5668\u6574\u5408\u81f3\u8def\u7531\u5668\u6216\u96c6\u7dda\u5668\uff0c\u6d88\u8cbb\u8005\u5c31\u4e0d\u9700\u8981\u591a\u8cb7\u4e00\u90e8\u88dd\u7f6e\uff0c\u6301\u6709\u6210\u672c\u4e5f\u6703\u964d\u4f4e\u3002\u82e5\u6d88\u8cbb\u8005\u5bb6\u88e1\u53e6\u5916\u8cb7\u4e86\u4e00\u90e8\u500b\u4eba\u96fb\u8166\uff0c\u4ed6\u5011\u9084\u53ef\u6dfb\u8cfc\u4ea4\u63db\u5668\uff0c\u4f7f\u4ed6\u5011\u80fd\u900f\u904e\u7db2\u8def\u5c07\u500b\u4eba\u96fb\u8166\u548c\u8a9e\u97f3\u9598\u9053\u5668\u9023\u63a5\u5728\u4e00\u8d77\u3002<\/p>\n
VoIP\u5b89\u5168\u5143\u4ef6<\/p>\n
\u8a31\u591a\u670d\u52d9\u4f9b\u61c9\u5546\u6b63\u5728\u90e8\u7f72\u4f4f\u5b85VoIP\u670d\u52d9\uff0c\u4ed6\u5011\u5c0d\u65bc\u5b89\u5168\u8a9e\u97f3\u901a\u8a0a\u975e\u5e38\u6ce8\u610f\u3002\u5b89\u5168VoIP\u7684\u5be6\u4f5c\u53ef\u4ee5\u5229\u7528\u8cc7\u6599\u901a\u8a0a\u5df2\u7d93\u5efa\u7f6e\u7684\u8a31\u591a\u5b89\u5168\u5143\u4ef6\uff0c\u73fe\u6709\u7db2\u969b\u7db2\u8def\u5b89\u5168\u57fa\u790e\u8a2d\u65bd\u7684\u91cd\u8981\u529f\u80fd\u4e4b\u4e00\u5c31\u662f\u76e3\u6e2c\u50b3\u8f38\u8cc7\u6599\u7684\u5b8c\u6574\u6027\uff0c\u6b64\u5b89\u5168\u5143\u4ef6\u6703\u78ba\u4fdd\u767c\u9001\u7aef\u548c\u63a5\u6536\u7aef\u4e4b\u9593\u7684\u8a0a\u606f\u672a\u88ab\u7ac4\u6539\uff0c\u540c\u6642\u78ba\u8a8d\u63a5\u6536\u65b9\u7684\u8eab\u4efd\u6b63\u78ba\u7121\u8aa4\u3002\u53e6\u4e00\u7a2e\u985e\u4f3c\u7684\u5b89\u5168\u5143\u4ef6\u5247\u662f\u5c0d\u65bc\u4e0d\u53ef\u5426\u8a8d\u6027\u7684\u652f\u63f4\uff0c\u5b83\u662f\u6307\u6578\u4f4d\u7c3d\u7ae0\u8a0a\u606f\u7684\u62d2\u7d55(\u6839\u64da\u91d1\u9470)\u3002\u7db2\u969b\u7db2\u8def\u5b89\u5168\u6027\u7684\u6a5f\u5bc6\u7b49\u7d1a\uff0c\u78ba\u4fdd\u53ea\u6709\u8a0a\u606f\u7684\u767c\u9001\u8005\u548c\u63a5\u6536\u8005\u6703\u770b\u5230\u9019\u985e\u8a0a\u606f\u7684\u5167\u5bb9\uff0c\u5b89\u5168\u5143\u4ef6\u7684\u6388\u6b0a\u529f\u80fd\u5247\u6703\u78ba\u4fdd\u7db2\u8def\u4f7f\u7528\u8005\u5fc5\u9808\u901a\u904e\u8eab\u4efd\u9a57\u8b49\u5f8c\uff0c\u624d\u80fd\u5920\u4f7f\u7528\u7279\u5b9a\u7684\u7db2\u8def\u670d\u52d9\u3002<\/p>\n
\u96a8\u8457\u6700\u7d42\u4f7f\u7528\u8005\u6216\u8005\u662f\u670d\u52d9\u4f9b\u61c9\u5546\u5c0d\u65bc\u5b89\u5168\u9867\u616e\u7684\u4e0d\u540c\uff0c\u63d0\u4f9b\u5404\u7a2e\u7b49\u7d1a\u7684\u5b89\u5168\u529f\u80fd\u5c07\u8b8a\u5f97\u6709\u5176\u5fc5\u8981\uff0c\u4f8b\u5982\u8a9e\u97f3\u627f\u8f09\u8cc7\u6599\u7684\u52a0\u5bc6\u5c31\u662f\u5e38\u898b\u529f\u80fd\u4e4b\u4e00\uff0c\u53e6\u4e00\u7a2e\u5b89\u5168\u7b49\u7d1a\u53ef\u80fd\u9700\u8981\u5c07\u9023\u7dda\u904e\u7a0b\u7684\u4fe1\u4ee4\u8a0a\u606f\u52a0\u5bc6\u3002<\/p>\n
\u5408\u800c\u70ba\u4e00<\/p>\n
\u96d6\u7136\u58d3\u529b\u5df2\u7d93\u51fa\u73fe\uff0c\u5e0c\u671b\u5ee0\u5546\u4ee5\u6700\u4f4e\u6210\u672c\u63d0\u4f9b\u4f4f\u5b85\u9598\u9053\u5668\u89e3\u6c7a\u65b9\u6848\uff0c\u4f46\u5b83\u4e5f\u8981\u6c42\u6240\u9078\u64c7\u7684\u96f6\u4ef6\u5fc5\u9808\u9054\u5230\u6700\u9ad8\u54c1\u8cea\u548c\u6548\u80fd\u3002\u8a9e\u97f3\u8655\u7406\u3001\u7db2\u8def\u548c\u96fb\u8a71\u4fe1\u4ee4\u3001POTS \u4ecb\u9762\u548c\u4e59\u592a\u7db2\u8def\u4ecb\u9762\u662f\u9019\u985e\u9598\u9053\u5668\u767c\u5c55\u6240\u9700\u7684\u6700\u4f4e\u529f\u80fd\u8981\u6c42\uff0c\u5b83\u5c0d\u65bc\u77ad\u89e3\u589e\u6dfb\u670d\u52d9 (supplementary service)\u7684\u985e\u578b\u4ee5\u53ca\u8a2d\u5099\u914d\u7f6e\u529f\u80fd(provisioning function)\u7684\u7bc4\u570d\u90fd\u6975\u70ba\u91cd\u8981\uff0c\u9019\u662f\u78ba\u4fdd\u7522\u54c1\u5b8c\u6574\u6027\u6240\u4e0d\u53ef\u6216\u7f3a\u7684\u8981\u6c42\u3002\u5730\u5340\u6027\u8003\u91cf\u4ee5\u53ca\u53ef\u7a0b\u5f0f\u8981\u6c42\u6703\u4e3b\u5c0ePOTS\u4ecb\u9762\u7684\u985e\u578b\uff0c\u6700\u7d42\u9084\u6703\u5f71\u97ff\u5b83\u5011\u7684\u6210\u672c\uff1b\u9664\u6b64\u4e4b\u5916\uff0c\u4f4f\u5b85\u9598\u9053\u5668\u82e5\u9700\u8981\u5176\u5b83\u7684\u5148\u9032\u529f\u80fd\uff0c\u4f8b\u5982\u8cc7\u6599\u8def\u7531\u6216\u662f\u8a9e\u97f3\u52a0\u5bc6\u6216\u8a8d\u8b49\uff0c\u90a3\u9ebc\u5b83\u5011\u5c31\u9700\u8981\u66f4\u591a\u7684\u8655\u7406\u6548\u80fd\u3002\u82e5\u5c07\u9019\u4e9b\u529f\u80fd\u90fd\u5305\u542b\u9032\u4f86\uff0c\u8a2d\u8a08\u4eba\u54e1\u5c31\u5fc5\u9808\u78ba\u4fdd\u5176\u7522\u54c1\u63a1\u7528\u8db3\u5920\u5f48\u6027\u7684\u67b6\u69cb\uff0c\u4e26\u63d0\u4f9b\u9069\u7576\u7684\u8655\u7406\u6548\u80fd\u4ee5\u652f\u63f4\u9019\u985e\u9700\u6c42\u3002\u9019\u500b\u7cfb\u5217\u7684\u5176\u5b83\u6587\u7ae0\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u4e9b\u529f\u80fd\u7684\u5404\u7a2e\u554f\u984c\u548c\u512a\u7f3a\u9ede\u3002<\/p>\n
VoIP\u96fb\u8a71\u4ecb\u9762<\/p>\n
\u767c\u5c55VoIP\u7cfb\u7d71\u6642\uff0c\u5b83\u8207\u985e\u6bd4\u96fb\u8a71\u7684\u4ecb\u9762\u662f\u91cd\u8981\u8003\u616e\u56e0\u7d20\u4e4b\u4e00\uff0c\u8a2d\u8a08\u4eba\u54e1\u5fc5\u9808\u77ad\u89e3\u516c\u773e\u96fb\u8a71\u4ea4\u63db\u7db2\u8def(PSTN)\u5c0d\u65bc\u96fb\u8a71\u8a2d\u5099\u7684\u8981\u6c42\uff0c\u56e0\u70baVoIP\u7cfb\u7d71\u4e5f\u8981\u652f\u63f4\u9019\u4e9b\u8a2d\u5099\u3002\u4ee5\u4e0b\u6587\u7ae0\u6703\u628a\u91cd\u9ede\u653e\u5728\u6a19\u6e96POTS\u96fb\u8a71\u7684\u5169\u7a2e\u5e38\u7528\u4ecb\u9762\uff1aFXS\u53caFXO\u3002<\/p>\n
FXS\u548cFXO\u662f\u985e\u6bd4\u96fb\u8a71\u4e16\u754c\u5e38\u898b\u7684\u540d\u8a5e\uff0c\u5728\u50b3\u7d71PSTN\u96fb\u8a71\u7dda\u8def\u88e1\uff0c\u5c40\u7aef\u4ea4\u63db\u6a5f\u6703\u5c07\u96fb\u6e90\u548c\u97ff\u9234\u8a0a\u865f\u9001\u81f3\u96fb\u8a71\uff0c\u518d\u7531\u96fb\u8a71\u672c\u8eab\u69cb\u6210\u5b8c\u6574\u7684Tip\/Ring\u7dda\u8def\uff0c\u4ee5\u4fbf\u5411PSTN\u63d0\u51fa\u670d\u52d9\u8981\u6c42\u6216\u63a5\u807d\u4f86\u81eaPSTN\u7684\u96fb\u8a71\u3002\u5c0d\u65bc\u900f\u904e\u7db2\u969b\u7db2\u8def\u64a5\u6253\u7684\u96fb\u8a71\uff0cFXS\u96fb\u8def\u6703\u6a21\u64ec\u96fb\u4fe1\u5c40\u7aef\u4ea4\u63db\u6a5f\uff0c\u4f4f\u5b85\u9598\u9053\u5668\u5247\uff0c\u63d0\u4f9b\u96fb\u6e90\u548c\u97ff\u9234\u8a0a\u865f\u7d66\u96fb\u8a71\uff0c\u540c\u6642\u5075\u6e2c\u8ff4\u8def\u96fb\u6d41\u3002\u53e6\u4e00\u65b9\u9762\uff0cFXO\u96fb\u8def\u5247\u6703\u6a21\u64ec\u96fb\u8a71\uff0c\u4f7f\u5f97\u7dda\u8def\u5f62\u6210\u5b8c\u6574\u8ff4\u8def\uff0c\u4e26\u5075\u6e2c\u9032\u4f86\u7684\u97ff\u9234\u8a0a\u865f\u3002<\/p>\n
FXS\u548cFXO\u539f\u672c\u662f\u70ba\u4e86\u64f4\u5927\u5e02\u5167\u96fb\u8a71\u7bc4\u570d\u3002\u5728800\u514d\u4ed8\u8cbb\u96fb\u8a71\u51fa\u73fe\u4e4b\u524d\uff0c\u60f3\u66ff\u6602\u8cb4\u9577\u9014\u96fb\u8a71\u8cbb\u7528\u5c0b\u627e\u66ff\u4ee3\u65b9\u6848\u7684\u4f01\u696d\u5ba2\u6236\u63d0\u4f9b\u5916\u7dda\u64a5\u865f\u97f3\u670d\u52d9\uff0c\u5ee0\u5546\u4e5f\u767c\u5c55\u8a31\u591a\u96fb\u4fe1\u8a2d\u5099\u652f\u63f4\u9019\u9805\u670d\u52d9\uff0c\u9019\u4e9b\u8a2d\u5099\u6700\u521d\u70ba\u985e\u6bd4\u7cfb\u7d71\uff0c\u7136\u5f8c\u8b8a\u6210\u6578\u4f4d\uff0c\u5b83\u5011\u5c07\u5916\u90e8\u96fb\u4fe1\u7db2\u8def\u4ea4\u63db\u6a5f\u623f(foreign central office\uff0c\u53c8\u7a31\u70baForeign eXchange Office)\u50b3\u4f86\u7684\u64a5\u865f\u97f3\u8f49\u9001\u7d66\u591a\u500b\u5167\u90e8\u96fb\u4fe1\u7db2\u8def\u4ea4\u63db\u6a5f(local central office sites\uff0c\u53c8\u7a31\u70baForeign eXchange Stations)(\u57166)\u3002\u9019\u9805\u61c9\u7528\u662fFXO\u4ecb\u9762\u7684\u65e9\u671f\u7528\u9014\u4e4b\u4e00\uff0c\u4e5f\u662f\u6b64\u6280\u8853\u76ee\u524d\u4ecd\u80fd\u5b58\u5728\u7684\u4e3b\u8981\u539f\u56e0\u3002<\/p>\n
\u985e\u6bd4\u96fb\u8a71\u548cPSTN\u4ecb\u9762<\/p>\n
FXS\u96fb\u8def\u5305\u542b\u5169\u90e8\u4efd\uff0c\u5206\u5225\u662f\u7de8\u78bc\u89e3\u78bc\u5668\u548c\u7528\u6236\u7dda\u8def\u4ecb\u9762\u96fb\u8def\u3002\u7de8\u78bc\u89e3\u78bc\u5668\u662f\u7531\u985e\u6bd4\u6578\u4f4d\u8f49\u63db\u5668(ADC)\u548c\u6578\u4f4d\u985e\u6bd4\u8f49\u63db\u5668(DAC)\u7d44\u6210\uff0c\u985e\u6bd4\u6578\u4f4d\u8f49\u63db\u5668\u8ca0\u8cac\u5c07\u985e\u6bd4\u96fb\u8a71\u9001\u4f86\u7684\u985e\u6bd4\u8a0a\u865f\u8f49\u63db\u6210\u6578\u4f4d\u8a0a\u865f\uff0c\u4ee5\u4fbf\u900f\u904eVoIP \u7db2\u8def\u50b3\u8f38\uff0c\u6578\u4f4d\u985e\u6bd4\u8f49\u63db\u5668\u5247\u5c07\u6578\u4f4d\u8a0a\u865f\u8f49\u63db\u6210\u985e\u6bd4\u96fb\u58d3\uff0c\u7136\u5f8c\u518d\u4f86\u9a45\u52d5\u985e\u6bd4\u96fb\u8a71\u3002\u70ba\u4e86\u9054\u52304KHz\u7684\u97f3\u8a0a\u983b\u5bec\uff0c\u985e\u6bd4\u6578\u4f4d\u8f49\u63db\u5668\u548c\u6578\u4f4d\u985e\u6bd4\u8f49\u63db\u5668\u7684\u53d6\u6a23\u901f\u7387\u901a\u5e38\u6703\u57288KHz\u5de6\u53f3\u3002SLIC\u5143\u4ef6\u6703\u6a21\u64ecPSTN\u7db2\u8def\u7684\u96fb\u58d3\u4f4d\u6e96\uff0c\u5b83\u9808\u5075\u6e2c\u96fb\u8a71\u7684\u639b\u65b7\u548c\u63a5\u807d\u52d5\u4f5c\uff0c\u540c\u6642\u7522\u751f\u9ad8\u9054120V\u7684\u97ff\u9234\u96fb\u58d3\u3002<\/p>\n
FXO\u662f\u7531\u7de8\u78bc\u89e3\u78bc\u5668\u548cDAA\u7d44\u6210\uff0c\u7de8\u78bc\u89e3\u78bc\u5668\u7684\u529f\u80fd\u548c\u5b83\u5728FXS\u6642\u5b8c\u5168\u76f8\u540c\uff0c\u8ca0\u8cac\u985e\u6bd4\u8a9e\u97f3\u548c\u6578\u4f4d\u8a0a\u865f\u7684\u8f49\u63db\uff0cDAA\u5247\u80fd\u6a21\u64ecPOTS\u96fb\u8a71\uff0c\u5176\u4e3b\u8981\u529f\u80fd\u662f\u9664\u53bb\u9ad8\u58d3\u76f4\u6d41\u504f\u58d3\u3002DAA\u6703\u5728PSTN\u7aef\u5f62\u6210\u9589\u8ff4\u8def\uff0c\u4f7f\u5f97PSTN\u7cfb\u7d71\u9001\u4f86\u7684\u8a0a\u865f\u4e2d\uff0c\u53ea\u6709\u985e\u6bd4\u4ea4\u6d41\u8a0a\u865f\u80fd\u5920\u901a\u904e\u3002<\/p>\n
FXO\u5c0d\u6620FXS<\/p>\n
\u5728VoIP\u9598\u9053\u5668\u4e2d\uff0cFXS\u96fb\u8def\u662f\u900f\u904e\u5c01\u5305\u7db2\u8def\u64a5\u6253\u96fb\u8a71\u548c\u63a5\u807d\u96fb\u8a71\u7684\u4e3b\u8981\u4ecb\u9762\u3002\u5728\u5c40\u7aef\u61c9\u7528\u88e1\uff0cFXS\u4ecb\u9762\u662f\u7531POTS\u7dda\u8def\u5361\u7684\u5169\u7dda\u5f0fSLIC\u4ecb\u9762\u64d4\u4efb\u3002\u5728\u7528\u6236\u7aef\u61c9\u7528\u4e2d\uff0cFXS\u96fb\u8def\u5247\u662f\u5167\u5efa\u65bc\u9598\u9053\u5668\uff0c\u8ca0\u8cac\u63d0\u4f9b\u64a5\u865f\u97f3\u3001\u96fb\u6c60\u96fb\u6d41\u548c\u97ff\u9234\u96fb\u58d3\uff0c\u540c\u6642\u5075\u6e2c\u8a71\u6a5f\u6240\u5f62\u6210\u7684\u9589\u8ff4\u8def\uff1b\u7531\u65bc\u9019\u500b\u5207\u63db\u529f\u80fd\u662f\u5728\u7528\u6236\u7aef\u8a2d\u5099\u5c64\u7d1a\u63d0\u4f9b\uff0c\u56e0\u6b64\u8207PSTN\u7684\u76f4\u63a5\u9023\u7dda\u5c31\u8b8a\u5f97\u6beb\u7121\u5fc5\u8981\u3002\u7136\u800c\u5728\u67d0\u4e9b\u60c5\u5f62\u4e0b\uff0c\u5229\u7528FXO\u4ecb\u9762\u9023\u7dda\u81f3PSTN\u4ecd\u7136\u6709\u5176\u7528\u8655\uff0c\u56e0\u70ba\u53ea\u8981\u7a0d\u70ba\u505a\u4e9b\u6539\u9032\uff0c\u5b83\u5c31\u80fd\u540c\u6642\u505a\u70ba\u5c40\u7aef\u548c\u666e\u901aPOTS\u96fb\u8a71\u7684\u4ecb\u9762\u3002FXO\u9023\u63a5\u57e0\u7684\u90e8\u4efd\u91cd\u8981\u7528\u9014\u70ba\uff1a<\/p>\n
\u2027\u96fb\u6e90\u6545\u969c\u6642\u7684\u7dca\u6025\u9023\u63a5\u7dda\u8def\uff1a\u8a9e\u97f3\u9598\u9053\u5668\u7684\u96fb\u6e90\u4e2d\u65b7\u6642\uff0c\u9598\u9053\u5668\u5c07\u7121\u6cd5\u9023\u63a5\u81f3\u5c01\u5305\u7db2\u8def\uff0c\u4e5f\u4e0d\u80fd\u64a5\u6253\u6216\u63a5\u807d\u96fb\u8a71\uff0c\u6b64\u6642\u53ef\u5229\u7528\u7e7c\u96fb\u5668\u5c07\u985e\u6bd4\u96fb\u8a71\u76f4\u63a5\u9023\u81f3PSTN\u3002\u9019\u7a2e\u60c5\u5f62\u51fa\u73fe\u6642\uff0cFXO\u96fb\u8def\u5373\u53ef\u767c\u63ee\u5176\u667a\u6167\u529f\u80fd\uff0c\u5075\u6e2c\u901a\u8a71\u662f\u5426\u4ecd\u5728\u9032\u884c\uff0c\u9632\u6b62\u9019\u901a\u96fb\u8a71\u5728\u96fb\u6e90\u6062\u5fa9\u5f8c\u88ab\u5207\u65b7\u3002<\/p>\n
\u2027\u901a\u8a71\u91cd\u65b0\u5c0e\u5411\uff1a\u5c01\u5305\u7db2\u8def\u7121\u6cd5\u9023\u63a5\u81f3\u7528\u6236\u6240\u64a5\u7684\u865f\u78bc\u6642\uff0c\u5373\u53ef\u4f7f\u7528\u9019\u9805\u529f\u80fd\uff0c\u6b64\u6642\u70ba\u4e86\u63a5\u901a\u96fb\u8a71\uff0c\u8a9e\u97f3\u9598\u9053\u5668\u6703\u5c07\u5b83\u91cd\u65b0\u5c0e\u5411FXO\u9023\u63a5\u57e0\u3002\u5c0d\u65bc\u4e00\u90e8\u64cd\u4f5c\u65b9\u4fbf\u7684\u9598\u9053\u5668\uff0c\u7528\u6236\u7aef\u88dd\u7f6e\u6703\u5c07\u6240\u64a5\u7684\u865f\u78bc\u76f4\u63a5\u9001\u81f3FXO\u9023\u63a5\u57e0\uff0c\u9019\u6a23\u4f7f\u7528\u8005\u5c31\u4e0d\u5fc5\u91cd\u65b0\u64a5\u865f\u3002<\/p>\n
\u2027\u9060\u8dddVoIP\u64a5\u865f\uff1a\u7528\u6236\u51fa\u9580\u5728\u5916\u6642\u4ecd\u80fd\u900f\u904ePSTN\u7db2\u8def\uff0c\u5229\u7528\u5bb6\u88e1\u96fb\u8a71\u865f\u78bc\u64a5\u6253VoIP\u96fb\u8a71\uff0c\u8a9e\u97f3\u9598\u9053\u5668\u6703\u900f\u904eFXO\u9023\u63a5\u57e0\u63a5\u807d\u9019\u901a\u96fb\u8a71\uff0c\u518d\u5c07\u5b83\u8f49\u63a5\u5230VoIP\u7db2\u8def\u3002<\/p>\n
\u57167\u548c8\u986f\u793aFXS\u548cFXO\u4ecb\u9762\u63d0\u4f9b\u67d0\u4e9b\u5171\u540c\u529f\u80fd\uff0c\u5b83\u5011\u53c8\u7a31\u70baBORSCHT\u529f\u80fd\uff0c\u9019\u500b\u540d\u8a5e\u4e3b\u8981\u4ee3\u8868FXS\u529f\u80fd\uff0cFXO\u5247\u8f03\u50cf\u5176\u4e2d\u90e8\u4efd\u529f\u80fd\u7684\u93e1\u50cf\u3002BORSCHT\u53ef\u7c21\u8ff0\u5982\u4e0b\uff1a<\/p>\n
\u2027B\uff1aFXS\u7dda\u8def\u994b\u9001\u4ecb\u9762\u6240\u63d0\u4f9b\u7684\u96fb\u6e90\u994b\u9001\u529f\u80fd\uff0cFXO\u4ecb\u9762\u8207\u5176\u5c0d\u61c9\u7684\u5247\u662f\u96fb\u6e90\u6c72\u53d6\u529f\u80fd\u3002\u5f9e\u57168\u5373\u53ef\u770b\u51fa\uff0cFXO\u7684\u96fb\u8a71\u63a5\u807d\u7e7c\u96fb\u5668(off-hook relay)\u6703\u5c07\u5c40\u7aefTip\u548cRing\u63a5\u8173\u9023\u63a5\u5728\u4e00\u8d77\uff0c\u9650\u6d41\u529f\u80fd\u5247\u662f\u7531FXO\u63d0\u4f9b\u3002<\/p>\n
\u2027O\uff1aFXO\u5fc5\u9808\u63d0\u4f9b\u904e\u96fb\u58d3\u4fdd\u8b77\u529f\u80fd\uff0c\u56e0\u70ba\u9583\u96fb\u6253\u96f7\u6216\u96fb\u6e90\u4ea4\u4e92\u5e72\u64fe\u7b49\u60c5\u5f62\u90fd\u53ef\u80fd\u767c\u751f\u3002\u5728FXS\u96fb\u8def\u4e2d\uff0cSLIC\u7684Tip\u548cRing\u8f38\u5165\u7aef\u9084\u7d93\u904e\u7279\u5225\u8a2d\u8a08\uff0c\u4f7f\u5176\u63d0\u4f9b\u984d\u5916\u7684\u904e\u96fb\u58d3\u4fdd\u8b77\u80fd\u529b\u3002<\/p>\n
\u2027R\uff1a\u97ff\u9234\u8a0a\u865f\u7531\u5c40\u7aef\u63d0\u4f9b\uff0c\u4f46\u662fFXO\u61c9\u80fd\u5075\u6e2c\u97ff\u9234\u8a0a\u865f\uff0c\u4e26\u8f49\u9001\u9019\u9805\u8cc7\u8a0a\u3002FXS\u5fc5\u9808\u63d0\u4f9b\u9234\u6d41\u7d66\u8a71\u6a5f\uff0cSLIC\u6703\u5c07\u7de8\u78bc\u89e3\u78bc\u5668\u6216SLIC\u7522\u751f\u7684\u4f4e\u96fb\u58d3\u97ff\u9234\u8a0a\u865f\u653e\u5927\uff0c\u518d\u5c07\u5176\u9001\u81f3\u7528\u6236\u8ff4\u8def\u8b93\u96fb\u8a71\u97ff\u9234\u3002<\/p>\n
\u2027S\uff1a\u4fe1\u4ee4\u662f\u6307FXO\u63a5\u6536\u300c\u639b\u65b7\u96fb\u8a71\/\u63a5\u807d\u96fb\u8a71\u300d\u8cc7\u8a0a\u4ee5\u53ca\u5c07\u63a5\u807d\u96fb\u8a71\u63a7\u5236\u547d\u4ee4\u50b3\u9001\u81f3\u5c40\u7aef\u7684\u80fd\u529b\uff0c\u5b83\u9084\u9808\u5075\u6e2c\u97ff\u9234\u548c\u5176\u5b83\u72c0\u6cc1\uff0c\u4e26\u4e14\u50b3\u9001\u9019\u9805\u8cc7\u8a0a\u3002FXS\u5fc5\u9808\u80fd\u5920\u5075\u6e2c\u96fb\u8a71\u7684\u639b\u65b7\/\u63a5\u807d\u72c0\u614b\u3001\u5075\u6e2c\u548c\u7522\u751f\u96d9\u97f3\u8907\u983b(DTMF)\u64a5\u865f\u97f3\u4ee5\u53ca\u7522\u751f\u4f86\u96fb\u865f\u78bc\u7684\u986f\u793a\u8a0a\u865f\u3002<\/p>\n
\u2027C\uff1a\u7de8\u78bc\u662f\u7de8\u78bc\u89e3\u78bc\u5668\u7684\u529f\u80fd\u4e4b\u4e00\uff0c\u5b83\u662f\u6307\u8a9e\u97f3\u8a0a\u865f\u7684\u985e\u6bd4\u81f3\u6578\u4f4d\u7de8\u78bc\u4ee5\u53ca\u6578\u4f4d\u81f3\u985e\u6bd4\u7de8\u78bc\uff0cFXS\u548cFXO\u4ecb\u9762\u90fd\u5305\u542b\u7de8\u78bc\u89e3\u78bc\u5668\u3002<\/p>\n
\u2027H\uff1a\u6df7\u5408\u96fb\u8def\u529f\u80fd(hybrid functionality)\u5c0d\u65bc\u7a69\u5b9a\u6027\u548c\u826f\u597d\u7684\u97f3\u8cea\u6975\u70ba\u91cd\u8981\uff0c\u5b83\u5728FXS\u548cFXO\u4ecb\u9762\u7684\u91cd\u8981\u6027\u5b8c\u5168\u76f8\u540c\u3002<\/p>\n
\u2027T\uff1a\u6e2c\u8a66\u901a\u5e38\u4e0d\u662fFXO\u7684\u529f\u80fd\uff0c\u9019\u8207\u81ea\u52d5\u7dad\u8b77\u4e26\u4e0d\u76f8\u540c\uff0c\u6e2c\u8a66\u529f\u80fd\u662f\u7531\u5c40\u7aef\u63d0\u4f9b\uff0c\u4f46\u7531\u65bcFXS\u96fb\u8def\u6703\u7e5e\u904ePSTN\uff0c\u56e0\u6b64\u6240\u9700\u7684\u6e2c\u8a66\u548c\u8a3a\u65b7\u529f\u80fd\u5df2\u5167\u5efa\u81f3\u7de8\u78bc\u89e3\u78bc\u5668\u548cSLIC\u3002<\/p>\n
\u56de\u97f3<\/p>\n
\u7121\u8ad6\u900f\u904ePSTN\u6216\u5c01\u5305\u7db2\u8def\u64a5\u6253\u96fb\u8a71\uff0c\u7a69\u5b9a\u6027\u548c\u97f3\u8cea\u90fd\u6975\u70ba\u91cd\u8981\u3002\u56de\u97f3\u5c0d\u65bcFXS\u548cFXO\u4ecb\u9762\u529f\u80fd\u7684\u6f5b\u5728\u885d\u64ca\u975e\u5e38\u5927\uff0c\u53e6\u5916\u8981\u6ce8\u610f\u7684\u662f\u5728\u9019\u5169\u7a2e\u60c5\u5f62\u4e0b\uff0c\u7528\u6236\u7aef\u8a2d\u5099\u90fd\u5fc5\u9808\u5167\u5efa\u7279\u6b8a\u7684\u6df7\u5408\u96fb\u8def\u529f\u80fd\uff0c\u9019\u6a23\u624d\u80fd\u61c9\u4ed8\u4e16\u754c\u5404\u5730\u7684\u4e0d\u540c\u7dda\u8def\u963b\u6297\u3002\u666e\u901a\u7684POTS\u96fb\u8a71\u5927\u7d04\u6703\u6709200\u03a9\u81f3400\u03a9\u7684\u672a\u53d7\u63a7\u963b\u6297\uff0c\u7531\u65bc\u5f9e\u5c40\u7aef\u5230\u7528\u6236\u7aef\u7684\u96fb\u6d41\u662f\u5169\u7dda\u5f0f\uff0c\u53c8\u4e0d\u6703\u63d0\u9ad8\u589e\u76ca\uff0c\u56e0\u6b64\u5e38\u898b\u7684\u963b\u6297\u8b8a\u52d5\u73fe\u8c61\u4e26\u4e0d\u6703\u5f71\u97ff\u96fb\u8def\u6548\u80fd\u3002\u4f46\u82e5\u96fb\u4fe1\u7cfb\u7d71\u5728\u6bcf\u4e00\u7aef\u90fd\u4f7f\u75282\u81f34\u7dda\u7684\u97f3\u983b\u6df7\u5408\u96fb\u8def\uff0c\u6216\u662f4\u7dda\u96fb\u8def\u63d0\u4f9b\u4e86\u67d0\u4e9b\u589e\u76ca\uff0c\u90a3\u9ebc\u7a69\u5b9a\u6027\u548c\u56de\u97f3\u554f\u984c\u5c31\u53ef\u80fd\u51fa\u73fe\u3002<\/p>\n
\u7dda\u8def\u56de\u97f3\u6709\u5169\u500b\u4f86\u6e90\uff0c\u4e00\u662f\u50b3\u9001\u7684\u8a9e\u97f3\u8a0a\u865f\u5728\u6df7\u5408\u96fb\u8def(2\u81f34\u7dda\u8f49\u63db\u9ede)\u7d93\u904e\u4e00\u6bb5\u5ef6\u9072\u6642\u9593\u5f8c\u6ef2\u5165\u63a5\u6536\u8def\u5f91\uff0c\u53e6\u4e00\u5247\u662f\u963b\u6297\u4e0d\u5339\u914d\u4f7f\u5f97\u8a0a\u865f\u5728\u7528\u6236\u8ff4\u8def\u88e1\u53cd\u5c04\u56de\u4f86\u3002PSTN\u7cfb\u7d71\u7e3d\u662f\u6703\u51fa\u73fe\u56de\u97f3\uff0c\u4f46\u5b83\u5011\u4e0d\u5fc5\u7136\u6703\u9020\u6210\u554f\u984c\uff1b\u4e8b\u5be6\u4e0a\uff0c\u60a8\u7d93\u7531\u96fb\u8a71\u6240\u50b3\u9001\u7684\u8a0a\u865f\u6703\u6709\u4e00\u90e8\u4efd\u8026\u5408\u81f3\u63a5\u6536\u8def\u5f91\u4ee5\u7522\u751f\u5074\u97f3\u3002\u5074\u97f3\u8b93\u7528\u6236\u80fd\u5f9e\u807d\u7b52\u88e1\u807d\u5230\u81ea\u5df1\u7684\u8072\u97f3\uff0c\u5982\u679c\u6c92\u6709\u5074\u97f3\uff0c\u7528\u6236\u5c07\u7121\u6cd5\u78ba\u5b9a\u5c0d\u65b9\u662f\u5426\u807d\u5230\u4ed6\u7684\u8072\u97f3\uff0c\u9019\u6703\u4f7f\u5f97\u901a\u8a71\u904e\u7a0b\u8b8a\u5f97\u5f88\u7cdf\u7cd5\u3002<\/p>\n
\u7136\u800c\u7dda\u8def\u56de\u97f3\u82e5\u672a\u53d7\u63a7\u5236\uff0c\u4f7f\u5176\u97f3\u91cf\u8b8a\u5f97\u592a\u5927\uff0c\u5c31\u53ef\u80fd\u5c0d\u6253\u96fb\u8a71\u7684\u4eba\u9020\u6210\u5169\u65b9\u9762\u5f71\u97ff\uff1a1.\u56de\u97f3\u8d8a\u5927\uff0c\u5c0d\u65bc\u901a\u8a71\u904e\u7a0b\u7684\u5f71\u97ff\u5c31\u8d8a\u5927\u3002\u96fb\u8a71\u7dda\u8def\u901a\u5e38\u90fd\u6709\u56de\u97f3\uff0c\u53ea\u4e0d\u904e\u5b83\u5011\u7684\u97f3\u91cf\u5f88\u5c0f\uff0c\u7528\u6236\u7121\u6cd5\u5bdf\u89ba\u30022.\u56de\u97f3\u7684\u5ef6\u9072\u6642\u9593\u4e5f\u6703\u5c0d\u97f3\u8cea\u7522\u751f\u6975\u5927\u5f71\u97ff\uff0c\u9019\u500b\u5ef6\u9072\u6642\u9593\u662f\u5f9e\u7528\u6236\u8b1b\u8a71\u958b\u59cb\uff0c\u76f4\u5230\u4ed6\u807d\u5230\u81ea\u5df1\u56de\u97f3\u7684\u6240\u9700\u6642\u9593\uff0c\u53ea\u8981\u5168\u7a0b\u56de\u97f3\u6642\u9593\u8d85\u904e25\u6beb\u79d2\uff0c\u97f3\u8cea\u5c31\u6703\u53d7\u5230\u5f71\u97ff\u3002<\/p>\n
\u6df7\u5408\u96fb\u8def\u63d0\u4f9b2\u81f34\u7dda\u8f49\u63db\u4ee5\u53ca4\u81f32\u7dda\u8f49\u63db\uff0c\u5176\u4e3b\u8981\u529f\u80fd\u662f\u9650\u5236\u5916\u9001\u8a0a\u865f\u300c\u6ef2\u5165\u300d\u63a5\u6536\u8def\u5f91\u7684\u7a0b\u5ea6\u3002\u7531\u65bc\u50b3\u8f38\u6df7\u5408\u4e0d\u5e73\u8861(\u6df7\u5408\u96fb\u8def\u96f6\u4ef6\u4e0d\u5b8c\u7f8e\uff0c\u963b\u6297\u4e0d\u5339\u914d\u7b49\u539f\u56e0)\uff0c\u7e3d\u6703\u6709\u4e9bTx\u8a0a\u865f\u9032\u5165Rx\u8def\u5f91(\u57169)\u3002<\/p>\n
\u9664\u4e86\u50b3\u8f38\u6df7\u5408\u4e0d\u5e73\u8861\u6240\u5c0e\u81f4\u7684\u56de\u97f3\uff0c\u6df7\u5408\u96fb\u8def\u7d42\u7aef\u963b\u6297\u4e0d\u5339\u914d\u4e5f\u6703\u9020\u6210\u7dda\u8def\u56de\u97f3\uff0c\u82e5\u7d42\u7aef\u963b\u6297\u4e0d\u7b49\u65bc\u7dda\u8def\u7279\u6027\u963b\u6297\uff0c\u56de\u97f3\u5c31\u6703\u7522\u751f\uff0c\u56e0\u70ba\u5169\u7dda\u5f0f\u7528\u6236\u8ff4\u8def\u9032\u4f86\u7684\u8a0a\u865f\u6703\u649e\u4e0a\u6df7\u5408\u96fb\u8def\u7684\u7d42\u7aef\u963b\u6297\uff0c\u7136\u5f8c\u53cd\u5c04\u56de\u7dda\u8def(\u571610)\u3002\u96fb\u8a71\u6216\u6578\u64da\u6a5f\u7b49\u7d42\u7aef\u5339\u914d\u4e0d\u826f\u7684\u7528\u6236\u7aef\u8a2d\u5099\u4e5f\u53ef\u80fd\u5728\u7528\u6236\u8ff4\u8def\u7522\u751f\u56de\u97f3\u3002<\/p>\n
\u60f3\u66f4\u77ad\u89e3\u7dda\u8def\u56de\u97f3\u7684\u4f86\u6e90\uff0c\u5c31\u9700\u8981PSTN\u7684\u67d0\u4e9b\u80cc\u666f\u77e5\u8b58\uff0c\u9019\u7a2e\u96fb\u8a71\u7db2\u8def\u5305\u542b\u5169\u500b\u57fa\u672c\u7d44\u6210\u55ae\u5143\uff1a\u4ea4\u63db\u50b3\u9001\u6838\u5fc3\u53ca\u7528\u6236\u8ff4\u8def\u3002<\/p>\n
\u4ea4\u63db\u548c\u50b3\u9001\u55ae\u5143\u8ca0\u8cac\u901a\u8a71\u5167\u5bb9\u7684\u50b3\u9001\u548c\u8def\u7531\u3001\u901a\u8a71\u670d\u52d9\u548c\u8a08\u8cbb\u7b49\u3002\u5728\u9019\u500b\u90e8\u4efd\uff0c\u6240\u6709\u7684\u8a9e\u97f3\u548c\u8cc7\u6599\u8a0a\u865f\u90fd\u662f\u4ee5\u6578\u4f4d\u50b3\u9001\uff0cTx\u548cRx\u8a0a\u865f\u4e5f\u6703\u4f7f\u7528\u4e0d\u540c\u7684\u8def\u5f91\uff0c\u9019\u4f7f\u5f97\u8a0a\u865f\u7684\u9577\u8ddd\u96e2\u50b3\u9001\u66f4\u7c21\u55ae\uff0c\u9084\u80fd\u4f7f\u7528\u4e2d\u7e7c\u5668\u3001\u5fae\u6ce2\u50b3\u8f38\u5854\u6216\u662f\u5176\u5b83\u8a2d\u5099\u3002\u7528\u6236\u8ff4\u8def\u662f\u7531\u300c\u6700\u5f8c\u4e00\u6bb5\u300d\u7684\u9285\u6750\u8cea\u7dda\u8def\u6240\u69cb\u6210\uff0c\u5b83\u6703\u5c07\u5c40\u7aef\u548c\u7528\u6236\u7aef\u9023\u63a5\u5728\u4e00\u8d77\u3002<\/p>\n
\u5728\u571611\u4e2d\uff0c\u82e5\u6211\u5011\u8ffd\u8e64\u96fb\u8a71A\u7684Tx\u8a0a\u865f\uff0c\u5247\u5c0f\u6b63\u65b9\u5f62\u65b9\u584a\u5c31\u4ee3\u8868\u53ef\u80fd\u7684\u56de\u97f3\u7522\u751f\u9ede(Echo Generation Point\uff0cEGP)\uff0c\u539f\u56e0\u662f\u50b3\u8f38\u6df7\u5408\u4e0d\u5e73\u8861\u6216\u963b\u6297\u4e0d\u5339\u914d\u3002\u5728\u9019\u500b\u4f8b\u5b50\u88e1\uff0c\u6211\u5011\u5047\u8a2d\u9019\u4e9bEGP\u6703\u7522\u751f\u5f88\u5927\u7684\u56de\u97f3\uff0c\u4e26\u4e14\u9020\u6210\u554f\u984c\u3002\u5f9e\u5716\u4e2d\u53ef\u4ee5\u770b\u51fa\u96fb\u8a71A\u5171\u6709 3\u500b\u5730\u65b9\u6703\u7522\u751f\u56de\u97f3(EGP 2\u30013\u548c4)\uff0c\u5176\u4e2dEGP2\u7684\u56de\u97f3\u662f\u7531\u65bc\u6df7\u5408\u96fb\u8def\u8207\u96fb\u8a71\u7dda\u8def\u7684\u963b\u6297\u4e0d\u5339\u914d\u800c\u7522\u751f\uff0c\u7136\u5f8c\u518d\u50b3\u56de\u96fb\u8a71A\u3002\u9019\u500b\u56de\u97f3\u4e0d\u6703\u9020\u6210\u56f0\u64fe\uff0c\u56e0\u70ba\u5168\u7a0b\u5ef6\u9072\u6642\u9593\u4e0d\u9577\uff0c\u6240\u4ee5\u4f7f\u7528\u8005\u4e0d\u6703\u6ce8\u610f\u5230\u5b83\u7684\u5b58\u5728\uff1b\u9664\u6b64\u4e4b\u5916\uff0c\u5074\u97f3\u4e5f\u6703\u84cb\u6389\u9019\u500b\u56de\u97f3\u3002EGP3\u548c4\u7522\u751f\u7684\u56de\u97f3\u624d\u662f\u6709\u554f\u984c\u7684\u56de\u97f3\uff0c\u56e0\u70ba\u5b83\u5011\u7684\u5168\u7a0b\u5ef6\u9072\u6642\u9593\u5f88\u9577\uff0c\u53ef\u80fd\u6703\u8d85\u904e25\u6beb\u79d2\uff1b\u4e00\u822c\u8aaa\u4f86\uff0c\u7db2\u8def\u300c\u9060\u7aef\u300d\u7522\u751f\u7684\u56de\u97f3\u6703\u9020\u6210\u6700\u5927\u554f\u984c\u3002EGP3\u7684\u56de\u97f3\u662f\u7531\u65bc\u50b3\u8f38\u6df7\u5408\u4e0d\u5e73\u8861\uff0cEGP4\u5247\u662f\u56e0\u70ba\u8a71\u6a5f\u548c\u7dda\u8def\u7684\u963b\u6297\u4e0d\u5339\u914d\u3002<\/p>\n
\u70ba\u4e86\u5e6b\u52a9\u6d88\u9664\u4e0d\u5fc5\u8981\u56de\u97f3\uff0c\u96fb\u8a71\u670d\u52d9\u4f9b\u61c9\u5546\u901a\u5e38\u6703\u5728PSTN\u5167\u90e8\u5b89\u88dd\u56de\u97f3\u6d88\u9664\u5668\u3002\u4ee5\u571611\u70ba\u4f8b\uff0c\u82e5\u8981\u6d88\u9664\u96fb\u8a71A\u7684\u7dda\u8def\u56de\u97f3\uff0c\u5c31\u5fc5\u9808\u5728\u7b2c2\u500bClass5\u4ea4\u63db\u6a5f\u7684\u524d\u9762\u6216\u5167\u90e8\u5b89\u88dd\u56de\u97f3\u6d88\u9664\u5668\u3002\u5c07\u56de\u97f3\u6d88\u9664\u5668\u52a0\u5165\u7db2\u8def\u76844\u7dda\u96fb\u8def\u90e8\u4efd\uff0c\u5b83\u7684\u5de5\u4f5c\u662f\u91dd\u5c0d\u5305\u542bEGP3\u548c4\u5728\u5167\u7684\u7528\u6236\u8ff4\u8def\uff0c\u70ba\u5176\u5efa\u7acb\u56de\u97f3\u7279\u5fb5\u6a21\u578b\uff0c\u7136\u5f8c\u914d\u5408\u96fb\u8a71A\u7684Tx\u8a0a\u865f\u77e5\u8b58\uff0c\u4f7f\u5b83\u80fd\u5728\u96fb\u8a71B\u7684Tx\u8a0a\u865f\u50b3\u9001\u56de\u96fb\u8a71A\u4e4b\u524d\uff0c\u5148\u5c07EGP3\u548c4\u7522\u751f\u7684\u56de\u97f3\u6d88\u9664\u3002\u5728VoIP\u7cfb\u7d71\u4e2d\uff0c\u51e1\u7531VoIP\u7528\u6236\u7aef\u9598\u9053\u5668\u64a5\u51fa\u6216\u662f\u63a5\u807d\u7684\u96fb\u8a71\uff0c\u5176\u56de\u97f3\u90fd\u61c9\u7531VoIP\u9598\u9053\u5668\u8655\u7406\u3002\u82e5\u96fb\u8a71\u9808\u7e5e\u7dda\u81f3 PSTN\uff0c\u5247PSTN\u6703\u7e7c\u7e8c\u57f7\u884c\u56de\u97f3\u6d88\u9664\u529f\u80fd\u3002<\/p>\n
\u6a19\u6e96<\/p>\n
\u96d6\u7136\u900f\u904e\u5c01\u5305\u7db2\u4e0d\u9700\u76f4\u63a5\u9023\u7dda\u81f3PSTN\uff0c\u4f46\u9019\u4e26\u4e0d\u8868\u793a\u7cfb\u7d71\u8a2d\u8a08\u4eba\u54e1\u4e0d\u5fc5\u6eff\u8db3PSTN\u7684\u8981\u6c42\u3002VoIP\u4f4f\u5b85\u9598\u9053\u5668\u7684\u8a2d\u8a08\u4eba\u54e1\u5fc5\u9808\u77ad\u89e3\u76ee\u524d\u7684\u96fb\u8a71\u8a2d\u5099\u9700\u6c42\uff0c\u7136\u5f8c\u5c07\u5b83\u5011\u7528\u65bc\u7cfb\u7d71\u7684FXS\u548cFXO\u4ecb\u9762\u3002\u4e0b\u52174\u7a2e\u4e3b\u8981\u6a19\u6e96\u662f\u77ad\u89e3PSTN\u884c\u70ba\u548c\u9700\u6c42\u7684\u95dc\u9375\uff1a<\/p>\n
\u2027GR57\u898f\u5b9a\u4e86\u6578\u4f4d\u8ff4\u8def\u8f09\u6ce2(Digital Loop Carrier)\u7cfb\u7d71\u5728\u5c40\u7aefTip\/Ring\u63a5\u9ede\u548c\u7cfb\u7d71\u7528\u6236\u7aefTip\/Ring\u63a5\u9ede\u4e4b\u9593\u7684\u884c\u70ba\u3002<\/p>\n
\u2027TA909\u63cf\u8ff0\u4e86\u5149\u7e96\u5230\u8def\u908a(Fiber-to-the-Curb)\u7cfb\u7d71\u5728\u5c40\u7aef\u6578\u4f4d\u4ecb\u9762(\u5317\u7f8e\u70baT1)\u548c\u7cfb\u7d71\u7528\u6236\u7aefTip\/Ring\u4ecb\u9762\u4e4b\u9593\u7684\u884c\u70ba\u3002Fiber-to-the-Curb\u7cfb\u7d71\u901a\u5e38\u662f16\u81f324\u901a\u9053\u7cfb\u7d71\u3002<\/p>\n
\u2027GR303\u8a0e\u8ad6\u300c\u6574\u5408\u5f0f\u300d\u6578\u4f4d\u8ff4\u8def\u8f09\u6ce2\u7cfb\u7d71\u7684\u884c\u70ba\uff0c\u4e26\u4e14\u898f\u5b9a\u6b64\u7cfb\u7d71\u5728\u5c40\u7aef\u6578\u4f4d\u4ecb\u9762(T1)\u548c\u7cfb\u7d71\u7528\u6236\u7aefTip\/Ring\u4ecb\u9762\u4e4b\u9593\u7684\u884c\u70ba\u3002\u9019\u985e\u7cfb\u7d71\u901a\u5e38\u76f8\u7576\u9f90\u5927\uff0c\u7528\u6236\u7aef\u53ef\u80fd\u6709\u6578\u767e\u5c0dTip\/Ring\u63a5\u9ede\u3002<\/p>\n
\u2027GR1089\u6307\u5b9a\u96fb\u8a71\u57fa\u790e\u8a2d\u65bd\u5728\u5317\u7f8e\u5730\u5340\u6240\u61c9\u7b26\u5408\u7684\u74b0\u4fdd\u6a19\u6e96\uff0c\u5176\u4e2d\u5305\u62ec\u5b83\u5011\u5c0d\u65bc\u9583\u96fb\u3001\u96fb\u6e90\u4ea4\u4e92\u5e72\u64fe(power cross)\u548c\u96fb\u78c1\u5e72\u64fe\u7684\u62b5\u6297\u80fd\u529b\uff0c\u5b83\u9084\u898f\u5b9a\u4e86\u975e\u6545\u610f\u96fb\u78c1\u5e45\u5c04\u503c(EMI)\u7684\u9650\u5236\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u767c\u5c55\u4f4f\u5b85VoIP\u9598\u9053\u5668 VoIP\u7cfb\u7d71\u5c64\u7d1a\u8207\u96fb\u8a71\u4ecb\u9762\u4ecb\u7d39 \u3010T Y Chan\u7b49\u4e09\u4f4d\u3011 2005.02 \u96d6\u7136VoIP\u7522\u54c1\u5728\u5e02\u5834\u51fa\u73fe\u5df2\u8d85\u904e\u4e03\u5e74\uff0c\u4f46Vonage\u3001 AT&T\u3001Sprint\u548c\u5176\u5b83\u670d\u52d9\u4f9b\u61c9\u5546\u5728\u6700\u8fd1\u6240\u505a\u7684\u5ba3\u4f48\u5f15\u8d77\u5f88\u5927\u9a37\u52d5\uff0c\u4f7f\u5f97\u6d88\u8cbb\u6027\u8a2d\u5099\u88fd\u9020\u5546\u7af6\u76f8\u63a8\u51fa\u4f4f\u5b85VoIP\u9598\u9053\u5668\u7522\u54c1\u3002\u672c\u6587\u5373\u91dd\u5c0d VoIP\u4f4f\u5b85\u9598\u9053\u5668\u7522\u54c1\u7684\u6240\u6709\u4e3b\u8981\u90e8\u4efd\uff0c\u8a73\u7d30\u8aaa\u660e\u5b83\u5011\u7684\u8a2d\u8a08\u8003\u91cf\uff0c\u4e26\u4ecb\u7d39\u4eca\u65e5VoIP\u4f4f\u5b85\u9598\u9053\u5668\u5e38\u898b\u7684\u4e3b\u8981\u7d44\u4ef6\u529f\u80fd\uff0c\u9ad8\u54c1\u8ceaVoIP\u901a\u8a71\u6240\u5fc5\u5099\u7684\u95dc\u9375\u8981\u7d20\uff0c\u7279\u5225\u662f\u96fb\u8a71\u96fb\u8def\u7684\u67d0\u4e9b\u8a2d\u8a08\u8003\u91cf\uff0c\u4ee5\u53ca\u6982\u8981\u4ecb\u7d39\u5b89\u5168\u3001\u8cc7\u6599\u8def\u7531\u548cQoS\u76e3\u6e2c\u7b49\u8981\u7d20\uff0c\u4f7f\u5176\u80fd\u63d0\u4f9b\u66f4\u6df1\u5165\u7684\u8a2d\u8a08\u5206\u6790\u3002<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1,21],"tags":[],"class_list":["post-115","post","type-post","status-publish","format-standard","hentry","category-general","category-voip"],"_links":{"self":[{"href":"http:\/\/www.banbanli.net\/blog\/index.php?rest_route=\/wp\/v2\/posts\/115","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.banbanli.net\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.banbanli.net\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.banbanli.net\/blog\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"http:\/\/www.banbanli.net\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=115"}],"version-history":[{"count":1,"href":"http:\/\/www.banbanli.net\/blog\/index.php?rest_route=\/wp\/v2\/posts\/115\/revisions"}],"predecessor-version":[{"id":3621,"href":"http:\/\/www.banbanli.net\/blog\/index.php?rest_route=\/wp\/v2\/posts\/115\/revisions\/3621"}],"wp:attachment":[{"href":"http:\/\/www.banbanli.net\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=115"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.banbanli.net\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=115"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.banbanli.net\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=115"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}