Verilink AS2000: The Basics (880-502981-001) Product Manual Manual de usuario descargar pdf (Pagina 78)

Monitoring and Troubleshooting

5-12 Verilink Access System 2000: The Basics

Unavailable Signal State (UASS)

The application module retroactively declares a UASS at the onset

of 10 consecutive SESs and clears the UASS at the onset of 10

consecutively non-severely errored seconds. The UASS is

equivalent to a Failed Signal State (FSS).

Unavailable Second (UAS)

The application module declares a UAS for any second during

which a UASS exists. An unavailable second is equivalent to a

Failed Second (FS).

Loss of Frame Count (LOFC)

An LOFC is an accumulation of the number of times an LOF is

declared. A loss of frame is declared when an LOS or OOF occurs

continuously for 2 to 3 seconds, and is cleared after 10 seconds

without a LOS or OOF event.

Errored Second-Line (ES-L)

An AMI ES-L is a second in which one or more bipolar violations are

received from the network. A B8ZS ES-L is declared when a bipolar

violation is received that is not part of a B8ZS substitution pattern.

Severely Errored Framing Second (SEFS)

An SEFS is a second experiencing one or more events of two or

more frame bit errors in a 3-millisecond period.

Loss of Signal Second (LOSS)

An LOSS is a second in which an LOS condition exists.

Alarm Indication Signal Second (AISS)

An AISS is a second in which the application module receives an AIS

from the network.

Remote Alarm Indication Second (RAIS)

This is a second during which the application module detects an

RAI (Yellow Alarm) from the network.

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Verilink AS2000: The Basics (880-502981-001) Product Manual Manual de usuario Pagina 78