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浜�銆丼DH鐨勭敘(ch菐n)鐢熻儗鏅�

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涓�銆丼DH鐨勫熀鏈偝杓稿師鐞�

銆€銆€SDH閲囩敤鐨勪俊鎭祼(ji茅)妲�(g貌u)绛夌礆(j铆)绋辩偤鍚屾鍌抽€佹ā濉奡TM-N(Synchronous Transport锛孨=1锛�4锛� 16锛�64)锛屾渶鍩烘湰鐨勬ā濉婄偤STM-1锛屽洓鍊�(g猫)STM-1鍚屾寰�(f霉)鐢ㄦ(g貌u)鎴怱TM-4锛�16鍊�(g猫)STM-1鎴栧洓鍊�(g猫) STM-4鍚屾寰�(f霉)鐢ㄦ(g貌u)鎴怱TM-16;SDH閲囩敤濉婄媭鐨勫箑绲�(ji茅)妲�(g貌u)渚�(l谩i)鎵胯級淇℃伅锛屾瘡骞€鐢辩副鍚�9琛屽拰姗悜 270脳N鍒楀瓧绡€(ji茅)绲勬垚锛屾瘡鍊�(g猫)瀛楃瘈(ji茅)鍚�8bit锛屾暣鍊�(g猫)骞€绲�(ji茅)妲�(g貌u)鍒嗘垚娈甸枊(k膩i)閵�(Section OverHead锛孲DH)鍗€(q奴)銆丼TM-N鍑堣矤(f霉)鑽峰崁(q奴)鍜岀鐞嗗柈鍏冩寚閲�(AU PTR)鍗€(q奴)涓夊€�(g猫)鍗€(q奴)鍩燂紝鍏朵腑娈甸枊(k膩i)閵峰崁(q奴)涓昏鐢ㄤ簬缍�(w菐ng)绲�(lu貌)鐨勯亱(y霉n)琛屻€佺鐞�銆佺董璀�(h霉)鍙婃寚閰嶄互淇濊瓑淇℃伅鑳藉姝ｅ父闈堟椿鍦板偝閫�锛屽畠鍙堝垎鐐哄啀鐢熸闁�(k膩i)閵�(Rege nerator Section OverHead锛孯SOH)鍜屽京(f霉)鐢ㄦ闁�(k膩i)閵�(Multiplex Section OverHead锛� MSOH);鍑堣矤(f霉)鑽峰崁(q奴)鐢ㄤ簬瀛樻斁鐪熸鐢ㄤ簬淇℃伅妤�(y猫)鍕�(w霉)鐨勬瘮鐗瑰拰灏戦噺鐨勭敤浜庨€氶亾缍(h霉)绠＄悊鐨勯€氶亾闁�(k膩i)閵峰瓧绡€(ji茅);绠＄悊鍠厓鎸囬嚌鐢ㄤ締(l谩i)鎸囩ず鍑堣矤(f霉)鑽峰崁(q奴)鍏�(n猫i)鐨勪俊鎭瀛楃瘈(ji茅)鍦⊿TM-N骞€鍏�(n猫i)鐨勬簴(zh菙n)纰轰綅缃互渚挎帴鏀舵檪(sh铆)鑳芥纰哄垎闆㈠噲璨�(f霉)鑽枫€係DH鐨勫箑鍌宠几鏅�(sh铆)鎸夌敱宸﹀埌鍙�銆佺敱涓婂埌涓嬬殑闋嗗簭鎺掓垚涓插瀷纰兼祦渚濇鍌宠几锛屾瘡骞€鍌宠几鏅�(sh铆)闁撶偤125渭s锛屾瘡绉掑偝杓�1/125脳1000000骞€锛屽皪(du矛)STM-1鑰岃█姣忓箑瀛楃瘈(ji茅)鐐�8bit脳(9脳270脳1)=19440bit锛屽墖STM-1鐨勫偝杓搁€熺巼鐐�19440脳8000=155.520Mbit/s;鑰孲TM-4鐨勫偝杓搁€熺巼鐐�4脳155.520Mbit/s=622.080Mbit/s;STM-16鐨勫偝杓搁€熺巼鐐�16脳155.520(鎴�4脳622.080)=2488.320Mbit/s銆�

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鍥涖€丼DH鐨勭壒榛�(di菐n)锛�

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銆€銆€(1)SDH鍌宠几绯荤当(t菕ng)鍦ㄥ湅(gu贸)闅涗笂鏈夌当(t菕ng)涓€鐨勫箑绲�(ji茅)妲�(g貌u)锛屾暩(sh霉)瀛楀偝杓告(bi膩o)婧�(zh菙n)閫熺巼鍜屾(bi膩o)婧�(zh菙n)鐨勫厜璺帴鍙�锛屼娇缍�(w菐ng)绠＄郴绲�(t菕ng)浜掗€�锛屽洜姝ゆ湁寰堝ソ鐨勬┇鍚戝吋瀹规€�锛屽畠鑳借垏鐝�(xi脿n)鏈夌殑PDH瀹屽叏鍏煎锛屽苟瀹圭磵鍚勭ó鏂扮殑妤�(y猫)鍕�(w霉)淇¤櫉(h脿o)锛屽舰鎴愪簡鍏ㄧ悆绲�(t菕ng)涓€鐨勬暩(sh霉)瀛楀偝杓搁珨鍒舵(bi膩o)婧�(zh菙n)锛屾彁楂樹簡缍�(w菐ng)绲�(lu貌)鐨勫彲闈犳€�;

銆€銆€(2)SDH鎺ュ叆绯荤当(t菕ng)鐨勪笉鍚岀瓑绱�(j铆)鐨勭⒓娴佸湪骞€绲�(ji茅)妲�(g貌u)鍑堣矤(f霉)鑽峰崁(q奴)鍏�(n猫i)鐨勬帓鍒楅潪甯告湁瑕�(gu墨)寰�锛岃€屽噲璨�(f霉)鑽疯垏缍�(w菐ng)绲�(lu貌)鏄悓姝ョ殑锛屽畠鍒╃敤杌熶欢鑳藉皣楂橀€熶俊铏�(h脿o)涓€娆＄洿鎺ュ垎鎻掑嚭浣庨€熸敮璺俊铏�(h脿o)锛屽(sh铆)鐝�(xi脿n)浜嗕竴娆″京(f霉)鐢ㄧ殑鐗规€�锛屽厠鏈嶄簡PDH婧�(zh菙n)鍚屾寰�(f霉)鐢ㄦ柟寮忓皪(du矛)鍏ㄩ儴楂橀€熶俊铏�(h脿o)閫�(j矛n)琛岄€愮礆(j铆)鍒嗚В鐒跺悗鍐嶇敓寰�(f霉)鐢ㄧ殑閬�(gu貌)绋�锛岀敱浜庡ぇ澶х啊(ji菐n)鍖栦簡DXC锛屾笡灏戜簡鑳岄潬鑳岀殑鎺ュ彛寰�(f霉)鐢ㄨō(sh猫)鍌�锛屾敼鍠勪簡缍�(w菐ng)绲�(lu貌)鐨勬キ(y猫)鍕�(w霉)鍌抽€侀€忔槑鎬�;

銆€銆€(3)鐢变簬閲囩敤浜嗚純鍏堥€�(j矛n)鐨勫垎鎻掑京(f霉)鐢ㄥ櫒(ADM)銆佹暩(sh霉)瀛椾氦鍙夐€ｆ帴(DXC)銆佺恫(w菐ng)绲�(lu貌)鐨勮嚜鎰堝姛鑳藉拰閲嶇祫鍔熻兘灏遍’寰楅潪甯稿挤(qi谩ng)澶�锛屽叿鏈夎純寮�(qi谩ng)鐨勭敓瀛樼巼銆傚洜SDH骞€绲�(ji茅)妲�(g貌u)涓畨鎺掍簡淇¤櫉(h脿o)鐨�5%闁�(k膩i)閵锋瘮鐗�锛屽畠鐨勭恫(w菐ng)绠″姛鑳介’寰楃壒鍒ュ挤(qi谩ng)澶�锛屽苟鑳界当(t菕ng)涓€褰㈡垚缍�(w菐ng)绲�(lu貌)绠＄悊绯荤当(t菕ng)锛岀偤缍�(w菐ng)绲�(lu貌)鐨勮嚜鍕�(d貌ng)鍖�銆佹櫤鑳藉寲銆佷俊閬撶殑鍒╃敤鐜囦互鍙婇檷浣庣恫(w菐ng)绲�(lu貌)鐨勭董绠¤不(f猫i)鍜岀敓瀛樿兘鍔涜捣鍒颁簡绌嶆サ浣滅敤;

銆€銆€(4)鐢变簬SDH鏈夊绋恫(w菐ng)绲�(lu貌)鎷�?f霉)娴(ji茅)妲�(g貌u)锛屽畠鎵€绲勬垚鐨勭恫(w菐ng)绲�(lu貌)闈炲父闈堟椿锛屽畠鑳藉寮�(qi谩ng)缍�(w菐ng)鐩�(ji膩n)锛岄亱(y霉n)琛岀鐞嗗拰鑷嫊(d貌ng)閰嶇疆鍔熻兘锛屽劒(y艒u)鍖栦簡缍�(w菐ng)绲�(lu貌)鎬ц兘锛屽悓鏅�(sh铆)涔熶娇缍�(w菐ng)绲�(lu貌)閬�(y霉n)琛岄潏娲�銆佸畨鍏�銆佸彲闈�锛屼娇缍�(w菐ng)绲�(lu貌)鐨勫姛鑳介潪甯搁綂鍏ㄥ拰澶氭ǎ鍖�;

銆€銆€(5)SDH鏈夊偝杓稿拰浜ゆ彌鐨勬€ц兘锛屽畠鐨勭郴鍒楄ō(sh猫)鍌欑殑妲�(g貌u)鎴愯兘閫氶亷(gu貌)鍔熻兘濉婄殑鑷敱绲勫悎锛屽(sh铆)鐝�(xi脿n)浜嗕笉鍚屽堡娆″拰鍚勭ó鎷�?f霉)娴(ji茅)妲�(g貌u)鐨勭恫(w菐ng)绲�(lu貌)锛屽崄鍒嗛潏娲�;

銆€銆€(6)SDH骞朵笉灏堝爆浜庢煇绋偝杓镐粙璩�(zh矛)锛屽畠鍙敤浜庨洐绲炵窔銆佸悓杌搁浕绾滐紝浣哠DH鐢ㄤ簬鍌宠几楂樻暩(sh霉)鎿�(j霉)鐜囧墖闇€鐢ㄥ厜绾�銆傞€欎竴鐗归粸(di菐n)琛ㄦ槑锛孲DH鏃㈤仼鍚堢敤浣滃共绶氶€氶亾锛屼篃鍙綔鏀窔閫氶亾銆備緥濡�锛屾垜鍦�(gu贸)鐨勫湅(gu贸)瀹惰垏鐪佺礆(j铆)鏈夌窔闆昏骞茬窔缍�(w菐ng)灏辨槸閲囩敤SDH锛岃€屼笖瀹冧篃渚夸簬鑸囧厜绾栭浕绾滄贩鍚堢恫(w菐ng)(HFC)鐩稿吋瀹�銆�

銆€銆€(7)寰濷SI妯″瀷鐨勮榛�(di菐n)渚�(l谩i)鐪�锛孲DH灞簬鍏舵渶搴曞堡鐨勭墿鐞嗗堡锛屽苟鏈皪(du矛)鍏堕珮灞ゆ湁鍤�(y谩n)鏍肩殑闄愬埗锛屼究浜庡湪SDH涓婇噰鐢ㄥ悇绋恫(w菐ng)绲�(lu貌)鎶€琛�(sh霉)锛屾敮鎸丄TM鎴朓P鍌宠几;

銆€銆€(8)SDH鏄毚(y谩n)鏍煎悓姝ョ殑锛屽緸鑰屼繚璀変簡鏁村€�(g猫)缍�(w菐ng)绲�(lu貌)绌�(w臎n)瀹氬彲闈狅紝瑾ょ⒓灏�锛屼笖渚夸簬寰�(f霉)鐢ㄥ拰瑾�(di脿o)鏁�;

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