 .  ᥬ ⮢  STS-1 ।⠢ 㦥
 ( 室),  ⠢訥 87 ⮫殢 ( 9 ,
 室  । 9 冷) ᮤঠ .  -
,  STS-1   744  ଠ樨.  SONET ।
஢ STS-1 ⢫  125 ᥪ㭤,  ⭮
। 8000 ஢  ᥪ㭤.

ᯮ짮 
ᨭ஭ । ()

 ᨭ஭ । ( - Asynchronous Transfer Mode) -
 孮, ஥   SONET.  , 뢠
祩,   48 ⮢   ᭮ 楩  ।
  .    祩     5 ,
 ᮤন ଠ   祭,   
祩 ⠢ 53 .  㯫 ⮪ ᮮ饭  ,
 ᯮ  ନ   ࠧ ᮮ饭 
祩   㧫-筨   ᨭ⥧  㧫 祭. 㦡
४祭 ⮢    ᯮ짮  প
࠭樨 ஢ ⠪ ,    㣮 㦡 । ᮮ饭
 쭮 ୮ . ⨯஢ 祥   
 䥪⨢ ᯮ짮   ய᪠ -
 裡.  뤥  祩  砥 室  让
㦥 䨪 ,  ॠ  㦤  ⥩
 ।  ਥ ᮮ饭.

ࠢ   MAN

த᪠ ᫨⥫쭠  (MAN - Metropolitan Area Network)
筠 .   뢠 ୠ   த,
㤮⢮ ⠭ IEEE 802.6.  ⠭  -
  묨  ᪮  155 /. ⮪, ᯮ㥬
 MAN, 뢠 DQDB (Dual Queue Dual Bus -  । 
 設)  ⮨   ⥫ ⮢,  
祭 㧫 . ᫨⥫쭠    DQDB ࠧ 
⠪ ࠧ, ⮡ 業ࠫ 㧥  ⠭  ନ஢
᫥⥫쭮 ᨭ஭ ᨣ  ࠢ  -
 ࠢ쭮 宦 ஢.  ⮪ DQDB ᯮ 
⫨, ⮡ ᯥ 㧫  ⠢   ॡ-
 ।  । ।.  ⮤  
ਥ ॠ     ᨬ   䨧᪮
殮.

ᯮ짮 ४砥
-⭮ 㦡 (SMDS)

   SONET, ଠ Bellcore ࠧࠡ⠫ ⮪ ,
뢠 ४砥 -⭠ 㦡 

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