ITU-T SG13(IP标准研究主导组)的会议历来都受到各国的关注.在1997～2000研究期的第四次会议上ITU-T作出了从以技术为趋势转向以市场为趋势的战略转移,提高了有关IP技术研究工作的地位,提出了信息通信体系的概念,采用加速程序通过了9个新建议、9个修订建议和2个增补建议,并确定了提交下次会议通过的22个建议. The meeting of ITU-T SG13 (the leading group of IP standards research) has always been of concern to all countries. At the fourth meeting of the 1997-2000 study period, ITU-T made a strategic shift from a technology-based to a market-oriented , Raised the status of research on IP technology, put forward the concept of information and communication system, and adopted 9 new proposals, 9 revised proposals and 2 additional proposals using accelerated procedures and identified 22 proposals for submission to the next meeting Suggest.