主幹子系統線纜用計算方法

主幹子系統線纜用計算方法

主幹布線由主幹纜、中間交叉連接和主交叉連接、機械終接及主幹交叉連接使用的軟線或跳線組成。

主幹子系統，銅線纜用量計算方法

電纜平均長度=(遠IDF距離+近IDF距離)/2

實際電纜平均長度= 電纜平均長度×1.1+(端接容限，通常取6)

每軸線纜布線根數= 每軸電纜長度/實際電纜平均長度

電纜需要軸數= IDF的總數/每箱線纜布線根數

註：遠、近IDF距離是從IDF到MDF的實際距離，主要取決於樓層高度和弱電井到MDF的水平距離。

主幹子系統，光纜用量計算方法

光纜平均長度=(遠IDF距離+近IDF距離)/2

實際光纜平均長度=光纜平均長度×1.1+(端接容限，通常取6)

光纜需要總量=IDF的總數×實際光纜平均長度

註：遠、近IDF距離是從IDF到MDF的實際距離，主要取決於樓層高度和弱電井到MDF的水平距離。

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Backbone subsystem, copper cable usage calculation method

Average cable length = (farthest IDF distance + nearest IDF distance)/2

Actual average cable length = average cable length × 1.1+ (termination tolerance, usually 6)

Number of cables per axis = cable length per axis / average length of actual cables

The number of cable shafts = the total number of IDF / the number of cables per box

Note: The farthest and nearest IDF distance is the actual distance from IDF to MDF, which mainly depends on the floor height and the horizontal distance from the weak current well to the MDF.

Backbone subsystem, calculation method of optical cable usage

Average length of optical cable = (farthest IDF distance + nearest IDF distance)/2

The actual average length of the optical cable = the average length of the optical cable × 1.1 + (termination tolerance, usually 6)

The total number of optical cables required = the total number of IDFs × the actual average length of optical cables

Note: The farthest and nearest IDF distance is the actual distance from IDF to MDF, which mainly depends on the floor height and the horizontal distance from the weak current well to the MDF.

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