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急需用电话,而又久打不通,这是最急人的了。假若你在南京要往重庆挂一个长途电话,可就难了。局外人不知道,这个电话,往往要舍近求远,绕道北京或其他地方,经过好几道转接才能到达。很多地方长途电话久挂不通,其原因就是电话线路少,迂回路线长。因此,空等半天一日,而又一无所获,这是常有的事。如今,这个状况有了转机,不要多久,打长途电话就可以很快接通了。1989年底,我国邮电通信部门作了很大努力,在中部地区打开一条新的通路——宁汉渝光缆数字通信工程。 1989年年底,我国已从南京到武汉,在全长1000公里的地下,敷设了一条不及半根头发丝粗的通信光缆,它是被当今世界称为高、新技术的我国“七·五”期间国家重点建设工程项目之一,也是迄今为止我国第一条长距离光缆数
Urgent need to use the phone, but for a long time to get through, this is the most urgent man. If you want to go to Chongqing to hang a long distance phone, but difficult. Outsiders do not know, this phone, often approaching, bypass Beijing or other places, after several transfers to arrive. Long-distance calls in many places long-lost, the reason is less telephone lines, circuitous route long. Therefore, it is not uncommon for us to wait for half a day and nothing. Now, this situation has been a turning point, not long before, make a long-distance calls can be quickly connected. By the end of 1989, China’s post and telecommunications department made great efforts to open a new channel in the central region - Ninghan Yu optical cable digital communications project. By the end of 1989, our country had already laid a less-than-one-half-long communication optical fiber cable cable from Nanjing to Wuhan underground in a 1,000-kilometer-long underground. It is one of the “Seventh-Five-Year” high-tech projects in the world today, During the national key construction projects is one of the first so far the number of long-distance fiber optic cable