As carriernetwork, optical transport network must be built prior to the 3g service network.
作为业务承载网络的3g光传送网，必须要先于业务网络的建设而建设。
2
The external line hasn't registered into carriernetwork. The external line has registered into carriernetwork.
在此窗口，图标会有所不同，如果外线已经进入运营商网路或没有登记。
3
Previously, Average Value Interface and Actual Value Interface have usually been used. Due to both inaccuracy and complexity, probably they are not effective in OFDM/multi-carriernetwork evaluation.