Alarm Indication Signal (AIS)
                        
                            GPTKB entity
                        
                    
                Statements (18)
| Predicate | Object | 
|---|---|
| gptkbp:instanceOf | gptkb:telecommunications_signal | 
| gptkbp:alsoKnownAs | all-ones signal blue alarm | 
| gptkbp:category | network management fault indication | 
| gptkbp:detects | network equipment | 
| gptkbp:effect | prevents false alarms downstream | 
| gptkbp:purpose | indicate upstream failure maintain downstream synchronization | 
| gptkbp:standardizedBy | gptkb:ITU-T gptkb:ANSI | 
| gptkbp:type | continuous stream of 1s | 
| gptkbp:usedIn | gptkb:Synchronous_Digital_Hierarchy_(SDH) Plesiochronous Digital Hierarchy (PDH) Synchronous Optical Networking (SONET) | 
| gptkbp:bfsParent | gptkb:SONET_OAM | 
| gptkbp:bfsLayer | 7 | 
| https://www.w3.org/2000/01/rdf-schema#label | Alarm Indication Signal (AIS) |