User Manual

ArchitectureNortel Networks Confidential 3–17
S8000/S8002/S8006 BTS Reference Manual
Overall configuration data includes the following:
the size of message queues
two queue overflow thresholds
the period defining the moment observation messages are sent
A connection configuration connects a TEI in a single time slot to a second
concentrated time slot.
Disconnecting may affect a TEI in a single time slot or in a concentrated time slot.
Disconnecting a concentrated time slot automatically triggers disconnection of
the concentrated TEI it contained.
Observations
The DSC returns its status to the CSWM as requested. The status report contains
overload alarms and hardware failures.
The DSC sends regular observation messages to the CSWM that contain the
following for the last traffic period and per time slot and TEI:
queue size
the maximum size reached by the queue
number of messages handled since the last status request
Tests
The DSC constantly tests unused time slots. It performs external loop tests on
CSWM request.
The results of unused time slot tests are returned to the CSWM in regular status
messages.
The CSWM may request the DSC to perform external tests. The DSC checks that
links are free and accepts (or refuses) start–up. The DSC returns the results of these
tests as requested.
Monitoring
The DSC supervises its own equipment parts and issues one the following fault
messages:
queue overload
receipt of unexpected frames
PCM link hardware malfunction