简要介绍了集传输与接入、干线与站场一体化的专用通信结构模式的全业务专用通信系统。
The paper briefly introduced a special communication system with full services, which combined transmission and access and integrated the trunk network with station and yard networks.
干线综合测试仪是对通信系统中的干线传输设备进行检测的仪器。
Trunk Tester is equipment that is used to test trunk transmission equipment of the communications system.
铝管外导体物理发泡射频同轴电缆主要用于有线电视系统中作干线、配线传输线。
RF coaxial cable with gas expanded, PE insulation and aluminium tube sheath is mainly used in cable TV system as trunk and distrubution transmission lines.
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