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去年9月,有92个单位131名代表参加了大连会议,以通信线路发展方向为主题进行了学术交流和10年的工作总结,并表彰了先进。会议对以下主要问题进行了讨论,并取得了较一致的看法。1.光缆结构的多样化和增加纤芯数与速率问题。长途干线光缆可能增至24～30芯,市内中继光缆可能增至48芯;若长途干线采用5次群、市内中继线采用4次群的光纤数字传输系统,则可立即获得减少光缆纤芯数和降低工程投资的实效。同时,应继续开发1550mm 波长区域的低衰减性能;当5次群设备开发后,还应研究色散位移光纤、气送光纤。
In September last year, 131 delegates from 92 units attended the Dalian conference and conducted academic exchanges and 10-year work summary with the theme of the development of communication lines, and commended advanced technologies. The meeting discussed the following major issues and obtained a more consistent view. 1. Cable structure diversification and increase the number of cores and rate issues. Long-distance trunk optical cable may be increased to 24 to 30 cores, the city may be increased to 48 core optical cable; long-distance trunk with 5 times the group, the city trunk 4 times the optical fiber digital transmission system, you can immediately reduce the fiber optic cable Core number and reduce the effectiveness of project investment. At the same time, the low attenuation performance of 1550mm wavelength region should be further developed. After 5 times of group equipment development, dispersion-shifted optical fiber and air-fed optical fiber should also be researched.