Operation and Maintenance Terminal
28 Operation and Maintenance Terminal
The OMT is a tool that provides efficient aid for installation, site
acceptance, diagnostics and maintenance of RBSs within the RBS 2000
series.
28.1 References
/G.703/ CCITT Recommendation G.703, White
Book
/G.704/ CCITT Recommendation G.704, White
Book
/GSM:11.20/ GSM 11.20 (phase 1)
/GSM:05.05/ GSM 05.05 (phase 2)
28.2 Concepts
CMRU Central Main RU. Subclass of Main RU.
An RBS has only one CMRU.
DMRU Distributed Main RU. Subclass of Main
RU. A DMRU is subordinate to the
CMRU.
Installation Database Each RBS has a built-in database where
information about installed hardware is
stored. The information reflects the
configuration as well as the history of the
hardware. Within the RBS, each RU
carries a database. The installation
database is used by the operator (via the
OMT), by RBS internal functions and
partly by the BSC (via A-bis).
Main RU A Main RU:
- contains one or more processors to which
software can be downloaded from the BSC.
- is either central or distributed, see above.
- may, or may not, have a direct signalling
link to the BSC.
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 function-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.
EN/LZT 123 2697 R5A
1998-08-13
169 (306)
© Ericsson Radio Systems AB
— All Rights Reserved —
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