'Summary Period' ISDN Primary Rate Interface Statistics

There are eight 'Summary Period' ISDN Primary Rate Interface Statistics objects, which each display statistics collected over a different time interval. Note that the summary periods are preconfigured; you cannot change the summary periods or create new 'Summary Period' ISDN Primary Rate Interface Statistics objects. All the 'Summary Period' ISDN Primary Rate Interface Statistics objects have the same fields. All the fields are read only and there are no management actions associated with this object. However, you can reset all the fields of these objects by clicking on the 'Reset statistics' pushbutton displayed in the ISDN Primary Rate Interface object.


Parameter

Type of statistic

Description
Channels configured - number Gauge The number of B-channels configured on this ISDN PRI. This does not include DS0s used as D-channels. A channel is counted as configured if the ISDN PRI is active and its parent DS1 is enabled.
Channels configured - low water mark Low The lowest number of B-channels configured on this ISDN PRI at any time during the summary period.
Channels configured - high water mark High The highest number of B-channels configured on this ISDN PRI at any time during the summary period.
Channels available - number Gauge The number of B-channels available for use on this ISDN PRI. This includes channels that are currently in use for calls.
Channels available - low water mark Low The lowest number of B-channels available for use on this ISDN PRI at any time during the summary period.
Channels available - high water mark High The highest number of B-channels available for use on this ISDN PRI at any time during the summary period.
Channels in use for calls - number Gauge The total number of B-channels in use for calls on this ISDN PRI.
Channels in use for calls - low water mark Low The lowest number of B-channels in use for calls on this ISDN PRI at any time during the summary period.
Channels in use for calls - high water mark High The highest number of B-channels in use for calls on this ISDN PRI at any time during the summary period.
Channels in use for originating calls - number Gauge The number of B-channels in use for originating calls on this ISDN PRI. For an access PRI, this is the count of channels in use by calls made by ISDN subscribers; for a trunk PRI, this is the count of channels in use by calls coming in to the MetaSwitch NE over this PRI.
Channels in use for originating calls - low water mark Low The lowest number of B-channels in use for originating calls on this ISDN PRI at any time during the summary period.
Channels in use for originating calls - high water mark High The highest number of B-channels in use for originating calls on this ISDN PRI at any time during the summary period.
Channels in use for terminating calls - number Gauge The number of B-channels in use for terminating calls on this ISDN PRI. For an access PRI, this is the count of channels in use by calls from the MetaSwitch NE to local ISDN subscribers; for a trunk PRI, this is the count of channels in use by calls going out from the MetaSwitch NE over this PRI.
Channels in use for terminating calls - low water mark Low The lowest number of B-channels in use for terminating calls on this ISDN PRI at any time during the summary period.
Channels in use for terminating calls - high water mark High The highest number of B-channels in use for terminating calls on this ISDN PRI at any time during the summary period.
Channels deactivated or in use by maintenance - number Gauge The number of B-channels deactivated (when the parent DS1 is not active) or in use by maintenance on this ISDN PRI.
Channels deactivated or in use by maintenance - low water mark Low The lowest number of B-channels deactivated or in use by maintenance on this ISDN PRI at any time during the summary period.
Channels deactivated or in use by maintenance - high water mark High The highest number of B-channels deactivated or in use by maintenance on this ISDN PRI at any time during the summary period.
Channels failed - number Gauge The number of failed B-channels on this ISDN PRI.
Channels failed - low water mark Low The lowest number of failed B-channels on this ISDN PRI at any time during the summary period.
Channels failed - high water mark High The highest number of failed B-channels on this ISDN PRI at any time during the summary period.
Originating call attempts - total Counter Total number of originating call attempts over this interface. For an access PRI, this is the count of calls made by ISDN subscribers; for a trunk PRI, this is the count of calls coming in to the MetaSwitch NE over this PRI.
Originating call attempts - successfully connected Counter Number of originating call attempts over this interface for which the call was connected successfully.
Originating call attempts - unconnected (normal reasons) Counter Number of originating call attempts over this interface for which the call could not be connected for one of the following reasons.
  • Called party busy
  • No answer
  • Caller abandon
  • Called party reject
  • Core network failure (independent of the ISDN interface)
Originating call attempts - unconnected (no channels available) Counter Number of originating call attempts over this interface for which the call could not be connected because there were no available B-channels.
Originating call attempts - unconnected (failures) Counter Number of originating call attempts over this interface for which the call could not be connected because of a failure related to the ISDN interface.
Terminating call attempts - total Counter Total number of terminating call attempts over this interface. For an access PRI, this is the count of calls from the MetaSwitch NE to local ISDN subscribers; for a trunk PRI, this is the count of calls going out from the MetaSwitch NE over this PRI.
Terminating call attempts - successfully connected Counter Number of terminating call attempts over this interface for which the call was connected successfully.
Terminating call attempts - unconnected (normal reasons) Counter Number of terminating call attempts over this interface for which the call could not be connected for one of the following reasons.
  • Called party busy
  • No answer
  • Caller abandon
  • Called party reject
Terminating call attempts - unconnected (no channels available) Counter Number of terminating call attempts over this interface for which the call could not be connected because there were no available B-channels.
Terminating call attempts - unconnected (failures) Counter Number of terminating call attempts over this interface for which the call could not be connected for one of the following reasons.
  • ISDN protocol errors
  • Dual seizure
  • Unexpected ISDN timer expiry
  • Media failure
  • Other abnormal failure conditions
Call usage - all calls Usage Total call usage on this interface.
Call usage - originating calls Usage Call usage for originating calls on this interface (calls made by ISDN subscribers).
Call usage - terminating calls Usage Call usage for terminating calls on this interface.
Channel utilization - percentage Percentage Average channel utilization during the summary period. This represents the number of B-channels in use as a percentage of the number of B-channels available.
Channel utilization - low water mark Low Minimum percentage channel utilization during the summary period.
Channel utilization - high water mark High Maximum percentage channel utilization during the summary period.
ISDN layer 2 signaling failures - primary D-channel Counter Number of ISDN layer 2 signaling failures on the primary D-channel for this interface during the summary period.
ISDN layer 2 signaling failures - secondary D-channel Counter Number of ISDN layer 2 signaling failures on the secondary D-channel for this interface during the summary period. This field is valid only if the ISDN Primary Rate Interface is using D-channel backup.
ISDN layer 2 signaling failures - calls released Counter Number of times an ISDN layer 2 signaling failure on this interface caused a call to be released during the summary period.
Protocol errors - associated with calls Counter Number of protocol errors in messages associated with a specific call on this interface during the summary period.
Protocol errors - not associated with calls Counter Number of protocol errors in messages associated with the interface as a whole, rather than with a specific call, on this interface during the summary period.