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鉴于祖国进行大规模地建设并开始自己制造多路载波电话通讯设备,这篇报告及时地提出架空明线十二路载波电话系统的新型设计方法.报告内容包含频率分配和变换程序,传输质量和电平选择,频率交叉法使用问题,压缩扩展器使用问题,以及自动调节电平设备,振铃讯号设备,终端机和增音机设备,线路进站和远距供电设备等各种制度的选择和比较,都提出初步意见,以供讨论.一、应用目的和经济意义二、频率分配和变换程序的讨论三、传输质量和电平选择的讨论四、频率交叉法使用的讨论五、压缩扩展器使用的讨论六、调节电平设备的讨论七、振铃讯号方法的讨论八、终端机和增音机设备的讨论九、线路进站设备的讨论十、远距供电设备的讨论参考交资料
In view of the large-scale construction of the motherland and the beginning of its own manufacture of multi-carrier telephony equipment, this report presents in time a new design methodology for the overhead metro line 12. The report covers frequency allocation and conversion procedures, transmission quality and electricity Ping choice, the use of frequency cross method, the use of compressed expander problems, as well as the automatic adjustment of level equipment, ringing signal equipment, terminal and repeater equipment, line inbound and long-range power supply equipment and other systems of choice and Comparison, have put forward the initial comments for discussion. First, the purpose of the application and economic significance Second, the frequency allocation and conversion process of discussion Third, the transmission quality and level of choice Fourth, the discussion of the use of frequency crossover method Five, The discussion of the use of six adjustment level device discussion seven ring signal method discussion eight terminal and the discussion of the sound device equipment nine line discussion of the pit stop device ten discussion of remote power supply equipment reference material