| 1. | Use dxx series transmission equipment to improve base station transmission quality of beijing mobile telephone network , including : equipment configuration , network structure , network management facility , and network synchronization scheme
利用dxx系列传输设备对北京移动通信的基站传输网进行了改进，包括：设备组成、网络结构、网管系统结构和功能以及同步时钟方案等。 |
