??????????????:?? ?????????

????:????:???????????

????????????1???????????23? ???????????,??22??,?,?????,??????

????????,??40??????????(?????????????????NGN),?????«???»??«?????»??????1996?????2011??????

?????????????????,NGN????,“NGN???«???»???????????????????????1996???????????????????????????2011?????(?????????????????)?,??????«??????»??,???????????????????”

???????????????,????????“??????????????????”??,???“??????????????”?

?????,???NGN??????«???»?????????????,???????????,????????,??????1000?????,???????????

???“?????”,???? ??????????????????????:??????????