Moreover , burying cabling can take anywhere from six to 12 months , whereas an fso link can be up and running in a few days 除此之外，传统缆线的埋设得花上6 ~ 12个月不等的时间，但是无线光通讯连结只需要几天的架设时间就可运作。
There is no messing about with radio - spectrum licences or digging up roads , and fso can also bypass prohibitive planning restrictions 另外，也用不着折腾申请无线电频道许可证或者把道路挖开埋光缆，同时，无线光通信也能够绕过禁止性的规划限制。
In places where transmitters are not allowed on roofs , for example , indoor fso transceivers can simply send and receive data through closed windows 例如，在屋顶不得设置传送器的地方，室内的无线光通信接收器也能简单地通过封闭的窗户传送和接收数据。
Depending on weather conditions , fso links can extend from a few city blocks to one kilometer ? far enough , though , to get broadband traffic from the backbone to many end users and back 视天气情况的不同，无线光通讯连结的距离可从几条街到一公里不等；不过这已经够远了，可以让宽频资讯从骨干传输到很多终端用户，或者是进行反方向传输。
So if dca combines with classified methods , the ordination effect on samples and species is better than that of dcca and cca . 2 . fso study on plant communities : we applly fuzzy set ordination ( fso ) to analyze the environmental factors and vegetation data 植物群落的模糊数学排序研究：运用模糊数学排序对样地的环境因子和植被数据进行了直接梯度分析，结合twinspan分类结果，与dcca比较，模糊数学排序直观的得出了环境因子和植物群落间的关系，分辨率较高。
