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Line 7: There are a number of types of AIS signals, which signal failure of different logical or physical segments of the system, including: * '''Alarm indication signal path''' (AIS-P) * '''Alarm indication signal line''' (AIS-L)12 These are [[SONET]] OC-xx level indications that indicate if the errored element is in a section, segment, line segment, or path segment of the SONET circuit.

Alarm indication signal: Difference between revisions