本ETR描述了在接入网（本报告中称为光接入网（OAN））中使用单模光纤的研究结果。它已经确定了一些需要的功能，并开始列出需要研究的功能。甚至可能要求不定义（标准化）已识别的某些功能。如果可以在适当的文本中为函数提供定义，则在本报告中给出。然而，如果定义需要进一步研究，则会相应地指出。由于该网络可承载模拟和数字信号，本ETR描述了用户网络和本地交换机或前端之间使用单模光纤（单模）的接入网络的特性，该接入网络允许从普通旧电话服务（POTS）和类似承载服务演变为宽带综合业务数字网络（B- ISDN）承载业务，无需重新连接已安装的光纤接入。还发现，其他标准化机构的研究可能会对接入网络的要求产生影响。由于这些机构目前没有提供任何意见，因此没有考虑它们的要求。[将TM-TR 002转换为ETR以供参考]

This ETR describes the results of the studies of the use of single-mode fibre in the access network, referred to in this report as the Optical Access Network (OAN). It has identified a number of functions that are required and has begun to list those functions that require to be studied. There may even be a requirement not to define (standardize) some of the functions identified. Where it has been possible to provide a definition in suitable text for a function, it is given in this report. However where a definition requires further study, this is indicated accordingly. As this network may carry analogue and digital signals, this ETR describes the characteristics of an access network using monomode fibre (single mode) between the user network and the local exchange, or head end, that allows evolution from the Plain Old Telephony Service (POTS) and similar bearer services to the Broadband Integrated Services Digital Network (B-ISDN) bearer service without the requirement to re-cable the installed fibre access. It has also been identified that there may be studies in other standardisation bodies that could have an impact on the requirements of the access network. As there has not been any input from these bodies at this time, their requirements have not been considered. [conversion of TM-TR 002 to ETR for referential purposes]