Juniper Networks M20 User Manual

Page 18

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Single-mode fiber

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Duplex SC/PC connector (RX and TX)

Cables and connectors

One tricolor per port:

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Off—Not enabled

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Green—Online with no alarms or failures

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Amber—Online with alarms for remote failures

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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 Signal Degrade (BERR-SD), Bit Error Rate Signal Fail (BERR-SF)

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Bit Error Rate Testing (BERT) per E1 channel

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Bit Interleaved Parity Errors B1, B2, B3 (CV-S, CV-L, CV-P)

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Loss of Frame (LoF), Loss of Pointer (LoP-P), Loss of Signal (LoS)

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Payload Mismatch (PLM-P), Payload Unequipped (UNEQ-P)

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Remote Defect Indication (RDI-L, RDI-P)

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Errored Seconds (ES-S, ES-L, ES-P), Severely Errored Framing (SEF), Severely Errored
Framing Seconds (SEFS-S), Severely Errored Seconds (SES-S, SES-L, SES-P), Unavailable
Seconds (UAS-L, UAS-P)

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Yellow alarm bit (X-bit) disagreements

Alarms, errors, and
events

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Channelized STM1 to E1 PIC

M20 Internet Router PIC Guide: End-of-Life PICs