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One tricolor per port:
■
Off—Not enabled
■
Green—Online with no alarms or failures
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Amber—Online with alarms for remote failures
■
Red—Active with a local alarm; router has detected a failure
LEDs
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Alarm indication signal (AIS)
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Bit error rate test (BERT) functionality on PIC (you can configure one DS3 channel in
BERT mode and configure the remaining channels to transmit and receive normal traffic)
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Equipment failure (does not affect service)
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Far-end block error (FEBE)
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Frame error
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Idle code, Idle received
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Local and remote loopback
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Loss of signal (LOS)
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Out of frame (OOF)
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Parity bit (P-bit) disagreements
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Path parity error
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Yellow alarm bit (X-bit) disagreements
Alarms, errors, and
events
DS3 PIC ■ 33
DS3 PIC