Operation and Maintenance Terminal
48 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.
48.1 References
/G.703/
/G.704/
/GSM:11.20/
/GSM:05.05/
Whenever a reference is made to a function described in another chapter,
please refer to the table of contents to find the appropriate chapter.
48.2 Concepts
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).
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 relation with a physical unit in the
RBS, and the MO comprises either both
hardware and software or software only.
Spare Bits A number of additional bits for spare use
in a timeslot 0 multiframe structure. This
is defined in /G. 704/. The use of these
bits is defined by the customer.
Timeslot 0 The timeslot 0 multiframe structure is
defined in /G. 704/.
CMRU Central Main Replaceble Unit. An RBS
has exactly one CMRU. In the RBS 2000
hardware architecture, the DXU is the
CMRU.
EN/LZT 720 0008 P2A
2001-11-28
383 (485)
© Ericsson Radio Systems AB
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