Reference Manual

Operation and Maintenance Support
configured and enabled to fulfil its
purpose.
Local Configuration When a RU reads necessary information
from its database and a signal is sent
when it is ready.
Main RU Contains one or more processors, to which
SW can be downloaded from the BSC. A
main RU is either central or distributed. A
main RU may or may not have a direct
signalling link to the BSC.
Master Cabinet In a multiple cabinet configuration, the
Master Cabinet is the cabinet with the SO
CF. In this document a Master Cabinet is
considered to be equal to a stand-alone
cabinet.
MO Managed Object. The BSC manages the
O & M of the RBS via the A-bis O & M
interface. The RBS equipment is seen as
MOs by the BSC. This is a means of
describing the RBS in a functional-
oriented way, and a logical model of the
RBS in terms of MOs, is built in the BSC.
All O & M actions are based on this
logical model structure created in the
BSC. An MO does not necessarily have a
one-to-one relationship with a physical
unit in the RBS and the MO comprises
either both HW and SW or SW only.
RFU Ready For Use (Op. State). When in
operational state "Ready For Use" the
instance is started by the BSC with the
correct SW.
RSSI Received Signal Strength Indicator
RU Replaceable Unit. An RU is the smallest
unit that can be handled on site or in a
repair centre and of which information can
be retrieved via OMT or BSC.
SO Service Object. A Service Object is an
abstract subclass of MO. An SO instance
carries service functions for a set of MO
instances, including itself. The Service
functions include Layer 2 termination and
Layer 3 distribution. They may also
include HW supervision and SW handling.
Sub-RU A sub-RU is always connected to a
superior main RU. This connection is used
for retrieval of equipment information. A
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Preliminary