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          PON+EOC

          EOC由局端及用戶端組成,局端將CATV信號和EPON網絡的數據信號進行復用,通過原有同軸電纜傳送到用戶側,最終通過用戶側的用戶端CNU分離出CATV信號和數據信號,從而實現對點播信號回傳及寬帶上網業務的承載。對于PON+EOC的解決方案,根據OLT及ONU放置位置不同,通常也可以分為兩種建網方式。

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          PON+EOC

           
          PON+EOC解決方案示意圖
           
                 EOC由局端及用戶端組成,局端將CATV信號和EPON網絡的數據信號進行復用,通過原有同軸電纜傳送到用戶側,最終通過用戶側的用戶端CNU分離出CATV信號和數據信號,從而實現對點播信號回傳及寬帶上網業務的承載。對于PON+EOC的解決方案,根據OLT及ONU放置位置不同,通常也可以分為兩種建網方式。

                 方式一:將OLT放置于分前端機房,由少量OLT完成對整個區域用戶的雙向網改覆蓋;適合于業務開通初期,用戶雙向網改接入率較低的場景,OLT放置位置靠前,便于對用戶的廣覆蓋,現有光纖和銅纜資源無需調整,低投資,高收益。

                 方式二:將OLT下沉至小區或樓棟,由OLT對多棟樓內的用戶進行雙向網改覆蓋。則適合于業務發展成熟期,用戶雙向改造需求旺盛、雙向改造接入率較高的場景,此時需要將光纖下移至樓棟,ONU均安裝于樓道內,滿足用戶高帶寬、高滲透率的需求。


          EOC系列產品(PON+EOC)

                 基于Homeplug AV(IEEE P1901),產品已形成系列化:

                 ●       獨立局端設備(室內型、野外型;1-4路RF輸入輸出;1-4路獨立數據模塊);

                        EOC+ONU二合一設備(1-4路獨立數據模塊、1-4路RF輸出);

                        EOC+光接收機二合一設備(1-4路獨立數據模塊、1-4路RF輸出);

                        EOC+光接收機+ONU三合一設備(1-4路獨立數據模塊,1-4路RF輸出);

                        EOC終端設備(1/2/4網口),可選WIFI終端或內置機頂盒終端;

                        EOC網管軟件,并可與EPON網管、HFC網管、綜合網管整合。

          組網及部署建議

                 OLT設備放在分前端機房,建議每個PON口下掛16~32個ONU設備。建議每PON口不超過 1024個用戶。具體分光比,請根據原HFC網絡的情況,從最大保護投資的角度設計。

                 光節點設備可內置ONU和CATV接收模塊,同有線電視廣播網絡相連;通過內置ONU模塊,同上層節點機房內的OLT設備相連。光節點設備部署在居民小區的樓道或者樓頭,CNU終端部署在用戶家中。

                 對光節點設備考慮到建網和業務開展情況有如下建議:


                        業務開展初期采用FTTC的組網模式,光節點放到小區光站位置,下接64線以內,為用戶提供2~5Mbps的接入帶寬; 

                        業務成熟期采用FTTB的組網模式,光節點設備放到樓道、地下室、弱電井等位置,下接10~40線用戶,單用戶帶寬最高可達到30Mbps。

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