应研究1310 nm和1550 nm波长下10 Gbit/s SDH长途系统的技术可能性，并考虑:-克服光纤色散限制的方法；-应指出不同的时分复用和时分复用及波分复用程序以及光纤放大器（OFA）的应用对现有或新标准的影响

The technical possibilities of 10 Gbit/s SDH long-haul systems at 1310 nm and 1550 nm wavelength shall be investigated, taking into account: - methods for overcoming fibre dispersion limitations; - different TDM and TDM & WDM procedures and - the application of Optical Fibre Amplifiers (OFA) Impacts on existing or new standards shall be pointed out