Datacommunication lines can be formulated in two ways to connect: point to point and multi-point line connection.
数据通讯线路可以以两种配制方式连接：点到点和多点线路连接。
2
The system composition, line warning device, main warning device and inner datacommunication protocol were introduced.
介绍了系统的组成、列告警器、总造警仪设计和内部数据通信具体约定。
3
The thesis investigates the design of the data center, the module of low power line carrier and the data administration center, the thesis also constitutes the correlative communication protocols.