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apsChanStatusTable

apasChanStatusTable provides APS channel statistics.

apsChanStatusEntry objects have read access only and are listed in Table 1.

Table 1: apsChanStatusTable

Object

Object Identifier

Description

apsChanStatusCurrent

apsChanStatusEntry 1

The current state of the port. This object has the following values:

lockedOut—This bit, when applied to a working channel, indicates that the channel is prevented from switching to the protection line. When applied to the null channel, this bit indicates that no working channel can switch to the protection line.

sd—A signal degrade condition is in effect.

sf—A signal failure condition is in effect switched. The switched bit is applied to a working channel if that channel is currently switched to the protection line.

wtr—A wait-to-restore state is in effect.

apsChanStatusSignalDegrades

apsChanStatusEntry 2

A count of signal degrade conditions. A signal degrade condition occurs when the line bit error rate (BER) exceeds the currently configured value of the relevant instance of apsConfigSdBerThreshold. Discontinuities in the value of this counter can occur when the management system is reinitialized, and at other times as indicated by the value of apsChanStatusDiscontinuityTime.

apsChanStatusSignalFailures

apsChanStatusEntry 3

A count of signal failure conditions that have been detected on the incoming signal. A signal failure condition occurs when a loss of signal, loss of frame, AIS-L or line bit error rate exceeds the currently configured value of the relevant instance of apsConfigSfBerThreshold. Discontinuities in the value of this counter can occur when the management system is reinitialized, and at other times as indicated by the value of apsChanStatusDiscontinuityTime.

apsChanStatusSwitchovers

apsChanStatusEntry 4

When queried with index value apsChanConfigNumber other than 0, this object returns the number of times this channel has switched to the protection line.

When queried with index value s set to 0, which is the protection line, this object returns the number of times that any working channel has switched back to the working line from this protection line. Discontinuities in the value of this counter can occur when the management system is reinitialized, and at other times as indicated by the value of apsChanStatusDiscontinuityTime.

apsChanStatusLastSwitchover

apsChanStatusEntry 5

When queried with index value apsChanConfigNumber other than 0, this object returns the value of sysUpTime when this channel last completed a switch to the protection line. If this channel has never switched to the protection line, the value 0 is returned.

When queried with index value apsChanConfigNumber set to 0, which is the protection line, this object returns the value of sysUpTime the last time that a working channel was switched back to the working line from this protection line. If no working channel has ever switched back to the working line from this protection line, the value 0 is returned.

apsChanStatusSwitchoverSeconds

apsChanStatusEntry 6

The cumulative Protection Switching Duration (PSD) time, in seconds. For a working channel, this is the cumulative number of seconds that service was carried on the protection line. For the protection line, this is the cumulative number of seconds that the protection line has been used to carry any working channel traffic.

This information is only valid if revertive switching is enabled. The value 0 is returned. Otherwise, discontinuities in the value of this counter can occur at reinitialization of the management system, and at other times as indicated by the value of apsChanStatusDiscontinuityTime. For example, if the value of an instance of apsChanStatusSwitchoverSeconds changes from a nonzero value to zero due to revertive switching being disabled. It is expected that the corresponding value of apsChanStatusDiscontinuityTime is updated to reflect the time of the configuration change.

apsChanStatusDiscontinuityTime

apsChanStatusEntry 7

The value of sysUpTime on the most recent occasion at which any one or more of this channel's counters suffered a discontinuity. The relevant counters are the specific instances associated with this channel of any Counter32 object contained in apsChanStatusTable. If no such discontinuities have occurred since the last reinitialization of the local management subsystem, then this object contains a zero value for apsChanStatusEntry.


Published: 2010-04-27

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