首页>
外国专利>
Directional fault indication in data transmission systems - has TTL circuit to activate both indicators if fault is on incoming line
Directional fault indication in data transmission systems - has TTL circuit to activate both indicators if fault is on incoming line
展开▼
机译:数据传输系统中的定向故障指示-如果输入线路上存在故障,则具有TTL电路来激活两个指示器
展开▼
页面导航
摘要
著录项
相似文献
摘要
The control mode of alarm indicator display in data transmission systems is modified to allow not only the occurrence of a fault to be indicated, but also the transmission direction. Two alarm contacts; one for general fault indication and one for direction are coupled to a transistor switching stage controlled by a latch circuit. The switching stage is externally clocked by two signals. An output transistor is coupled to transistor stages controlling indicator lamps. - In the event of a fault on an incoming transmission line both lamps are activated and if the fault occurs on an outgoing line then only one lamp is illuminated.
展开▼