最新刊期
      卷 ， 期 1 ， 1992
      • Liu Yunyao Liu Gu
        Issue 1, Pages: 1-13(1992) DOI: 10.13756/j.gtxyj.1992.01.001
        摘要：Based on two kinds of the frame structure of tributary mapping interface in synchronous transport module （STM） recommended by CCITT, this paper analysises and calculates the stuff jitter with positive justification method and positve/zero/negative justification method respectively.  
          
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      • Qin Yun
        Issue 1, Pages: 14-18(1992) DOI: 10.13756/j.gtxyj.1992.01.002
        摘要：This paper gives information on current status of communication system and development of optical communication in Wuhan. Owing to such rapid development at various administrative levels, communication capacity has been greatly expanded, and quality of service has been improved.  
          
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      • Chui Li
        Issue 1, Pages: 19-24(1992) DOI: 10.13756/j.gtxyj.1992.01.003
        摘要：This paper introduces a simulator of Poission errors for bit rate of 2048kbit/s.  
          
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      • Wang An
        Issue 1, Pages: 25-36(1992) DOI: 10.13756/j.gtxyj.1992.01.004
        摘要：This paper discusses the network confi guration of supervisory system in optical communication with emphasis on application and maintenance, experience is given for validity of supervision setting, reliability of operation,security and perfection of functionality of supervisory system. The commoness and differentiation between the concept of "transmission" and "exchange" are also described as well as the property of "transmission station" and that of "supervision station", which shall be conducive to acquisition, research and establishing of supervisory system in optical communication.  
          
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      • Zou Linsen Chen Yongshi
        Issue 1, Pages: 37-39(1992) DOI: 10.13756/j.gtxyj.1992.01.005
        摘要：This paper describes pulse delay-temperature dependence in fibre. Some ambiguity is also clarified in this paper.  
          
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      • Jiang Zhengquan
        Issue 1, Pages: 40-46(1992) DOI: 10.13756/j.gtxyj.1992.01.006
        摘要：Designs on the wall-thickness of high-polymer round loose-tube to be used as the secondary coating of fibers （or fiber-bundles ） are discussed in this paper. The relations between the wall-thickness and two typical forces applied to the tube (laterally and circumferentially, tube deformation ratio, tube outdiameter, elastic modulus of tube material are analyzed in details. Meanwhile, the quantified curves are given for the different high-polymer naterials suitable for loose tube （HDPE, PP, NYLON-12, TR-55, PBT）.  
          
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      • Chen Zhihao Cai Shengzhen
        Issue 1, Pages: 47-54(1992) DOI: 10.13756/j.gtxyj.1992.01.007
        摘要：In this paper we discuss the mode conversion in the nonlinear SELFOC fiber. The formula is given for the calculation of the axisymmetric mode conversion. It is shown that the Kerr nonlinear effect leads to the mode conversion if the value of n2P（n2: the nonlinear coefficient, P: the power） is large.  
          
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      • Huang Dingguo
        Issue 1, Pages: 55-62(1992) DOI: 10.13756/j.gtxyj.1992.01.008
        摘要：This paper introduces the application of optical transmission equipments employing H bit insertion coding to the rural communication network.The emphasis of this paper is placed on the unique advantage of network configuration in city and prefectural office level and under with opto-electronic transmission equipments adopting LSIC 1B1H coder.  
          
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      • Xu Yuanzhong et al.
        Issue 1, Pages: 63-67(1992) DOI: 10.13756/j.gtxyj.1992.01.009
        摘要：This paper introduces a noval monomode fixed optical attenuator suitable for engineering applications. Its theory, configuration and mechanical and environmental stability are described.  
          
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      • Issue 1, Pages: 67(1992) DOI: 10.13756/j.gtxyj.1992.01.010
        摘要：<正> 北京——武汉——广州通信干线,全长2800km,是我国通信网中的中轴线,有人称为干线中的干线。它对于我国大部分地区通信能否畅通,起着举足轻重的作用。目前,广州到北京的长途电话,忙时溢出率达90%以上,电话接通率仅1%～2%。为了迅速缓解京汉广一级中心间以及省际间通信严重紧张状况,邮电部决定在不放慢京汉广直埋光缆工程建设进度的同时,利用京汉广明线杆路建设京汉广架空光缆工程。采用12芯单模光缆,建成五主一备140Mbit/s系统。  
          
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