目前美日等国正在开展光缆通信网干线和中继系统的实验及商用试验工作。其中,光纤用户系统是当前光纤通信研究的热门课题。下表收集了六国光用户传输系统的实验以及商用情况。其中具有代表性的是法国的 At present, the United States and Japan and other countries are carrying out optical fiber communication network trunks and trunk system experiments and commercial trials. Among them, the optical fiber subscriber system is a hot topic in the current optical fiber communication research. The following table collects the experiment and business case of Liuguanguang user transmission system. One of the most representative is France