已解决问题
当前应用是否没有体现出EPON和GPON差异来?
提问者:xjwlmq
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提问时间:2009-6-15 10:42
我一直疑惑,现在EPON的FTTB模式好像用处不大,选EPON、GPON甚至点对点GE口都没有关系,我接触几个企业的设备,上行都可以另外选配成GE口、GPON口、EPON口。
在实际应用中,EPON也是一个固定带宽分配,每个ONU只分配一个固定的带宽值,所谓的动态带宽分配根本就没有用起来,一个感觉,对每个ONU来说,相当于EPON就是一个小一号的GE口,又比FE大一点。
在大家国家,好像点对点GE口方式的楼道交换机(也可以叫FTTB)有1千多万线了,现在的EPON FTTB与之相比也没有什么区别,所以还不如选GE的FTTB,成本更便宜。
困惑之处,请各位专家解惑。
我感觉就FTTH方式而言,PON相比大容量交换机的P2P方式没有什么优点。PON的分光看似节省光纤,但是实际使用上还是需要布放很多纤芯的,每个分支不可能只布1芯,1芯光缆怎么敷设?
回答时间:2009-6-15 11:49
此答案得到3次回应
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