M120 Internet Router PIC Guide
Cables and connectors
LEDs
Alarms, errors, and events
Instrumentation (counters)
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One bicolor per E1 port:
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■
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■Alarm indication signal (AIS)
■Loss of frame (LOF)
■Out of frame (OOF)
■Failed signal rate (FSR)
■Layer 2
36■ Channelized E1 IQ PIC