trunk line office 中文意思是什麼
trunk line office
解釋
長途電話局-
The epon network includes optical line terminal ( olt ) and optical network unit ( onu ). onuses share the optical distribution network ( odn ) trunk fiber back to the central office
Epon系統採用局端機( olt ) -用戶端機( olt )兩級結構,中間由無源光分配網路完成下行光功率分配和上行光耦合。
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