Nortel Networks 8000 Network Card User Manual


 
Call Management
300861-C Rev. 00 4-3
Call History Statistics
The RAC maintains generic call history statistics for terminated calls (both
completed calls and calls that failed to connect) and makes the information
available to management applications through SNMP MIB objects. The statistics
are used to generate call information for accounting purposes and capacity
planning. The call history MIB object names and descriptions are listed in the
callHistTable in the xylo-callmgmt.mib file, located in the annex_root/src/snmp
directory.
This table is implemented as a sliding window. This means that the starting and
ending indexes will change dynamically. Use callHistStartIdx to find the starting
index and callHistEndIdx to find the last index.
The objects in the callHistTable are indexed by the MIB object callHistIndex
which is a unique index assigned to each call in the order in which it was
terminated.
You can configure the number of calls that are logged in the callHistTable with the
callHistMaxCalls MIB object. The default value is zero (off).
Modem Call History Statistics
A further level of granularity is provided for modem call history statistics. The
callHistAsyTable in the xylo-callmgmt.mib file provides additional call history
statistics specifically for terminated modem calls. The callHistAsyTable is
implemented as a sparse table. The objects in the callHistAsyTable are indexed by
the MIB object callHistIndex which is a unique index assigned to each call in the
order in which it was terminated.
Note: The larger the number specified in callHistMaxCalls, the greater the
memory resources used by the RAC. Each call logged in the callHistTable uses
approximately 600 bytes of memory.