DC12V / DC24V / AC220V / AC110V LED Flash Flash Industrial Signal
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The AIS is also known as a "All-Ones", "Blue-Alarm" or "Keep-Alive" signal. When a data path is broken the first downstream device to detect this LOS/OOF condition sends an AIS-Alarm on down the line (2.5 seconds of an OOF condition will also cause the device to go into Red-Alarm and send a Yellow-Alarm back up the line).This AIS-Alarm consists of an unframed all ones signal sent to maintain.. Alarm Indication Signal (AIS)—AIS alarms are reported downstream from a detecting device, and to prevent consequential downstream failures or alarms from being raised. Remote Defect Indicator (RDI)—RDI alarms are always reported upstream from the detecting device.
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AIS (Alarm Indication Signal) Alarm in T1 Lines. The AIS Alarm, also known as "All-Ones," "Blue Alarm," or "Keep-Alive" signal, plays a vital role in T1 networks.When a break in the data path occurs, the first downstream device that detects this loss of signal (LOS) or Out-Of-Frame (OOF) condition sends an AIS Alarm down the line.. This section addresses alarms and procedures to correct them. After each step, issue the show controller e1 command to determine if any alarms occur. Receive Alarm Indication Signal. A receive (rx) Alarm Indication Signal (AIS) means that there is an alarm on the line upstream from the equipment connected to the port.