Reference Manual

Transport network O&M functions-DXX Support
51.4.4 DXX Node access control
This function is initiated during restart of the DXU if the parameter
TNOM_use in RBS DB is already set to ON, otherwise the function is
initiated when the parameter is set to ON.
The RBS support a node access control that is used to limit access
rights to the node from DXX. This function maintains the node access
registers.
The value for node access possible to set from DXX are 1 to 65535 for
limited access rights. If the node access list is empty (i.e. it does not
contain any non-zero access control id) then all management operations
are allowed. If the node access control list contains one or more non-
zero access id:s then only the Invokes (requests) having the access id
which can be found in the node access list are processed.
The RBS node will always respond on an invoke containing the node
access id equal to zero.
51.4.5 DXX Real time control
This function is initiated during restart of the DXU if the parameter
TNOM_use in RBS DB is already set to ON, otherwise the function is
initiated when the parameter is set to ON.
This function controls the administration of “Real time of node” and
“Relative time of unit” clocks.
It is possible from DXX to set a real time clock (Real time of node).
This clock is used for time stamps in alarm and performance reports.
The real time clock is used with a relative clock counter (Relative time
of unit), that is used to make time-stamps on individual fault events.
The real time of node counter has the possible values between 0 and
4 294 967 295. The relative time of unit counter has the same value
range. Both counters are incremented by one every 10 ms, where the
real time counter can be reset by NMS command while the relative
counter is free running.
51.4.6 DXX Current alarm report
This function is initiated during restart of the DXU if the parameter
TNOM_use in RBS DB is already set to ON, otherwise the function is
initiated when the parameter is set to ON.
This function sends Alarm reports from RBS to DXX upon requests.
The DXX polls the RBS asking for changes in fault events , and request
reports if the fault event condition has changed since the last poll.
Alarm reports can be sent for monitored faults such as Loss Of Signal
(LOS), Loss Of Frame (LOF), Alarm Indication Signal (AIS), Remote
Alarm Indication (RAI) etc. the fault conditions supervised are related
to PCM-A, PCM-B and common parts respectively.
The reports uses the Real time of node for time stamps and the
individual faults uses the Relative time of unit for their time stamps.
See Section 51.4.5 on page 389.
EN/LZT 720 0008 R1A
2001-06-26
389 (421)
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