Operation and Maintenance Terminal
DMRU Distributed Main Replaceble Unit. A
Main RU is said to be distributed if it is
subordinated to the CMRU.
Main RU Contains one or more processors, to which
software can be downloaded from the
BSC. A Main RU is either central or
distributed, see above. A Main RU may
or may not have a direct signalling link to
the BSC.
Passive RU A passive RU is an RU with a very low
level of intelligence. It is independent of
the processor system, for example, it has
no connection for O&M communication.
In the RBS 2000, for example the cables
are Passive RUs.
RU Replaceble Unit. An RU is the smallest
unit that can be handled on site or in a
repair center and of which information can
be retrieved via OMT or BSC.
Sub-RU A Sub-RU is always connected to a
superior Main RU. This connection is
used for retrieval of equipment
information. A Sub-RU normally does not
have a processor. Note that an RU with a
processor that is not loadable, is classified
as a Sub-RU. In the RBS 2000 hardware
architecture, for example the CDUs are
Sub-RUs.
48.3 Functions
48.3.1 User Interface
The OMT provides an easy-to-use graphical user interface. Well-known
hardware units and functions, for example, a transmitter, appear as
graphical objects. There are a number of operations attached to each
graphical object, for example for retrieving information about it.
The user interface is based on a number of views. Each view contains a
set of objects, chosen so that the natural work flow of the user is
supported.
For user convenience there is an on-line help facility in the OMT.
48.3.2 Radio Base Station
The following user functions, related to the RBS as a whole, are
available in the OMT:
• Display RBS configuration, see Chapter Installation Data
Handling.
384 (485)
EN/LZT 720 0008 P2A
2001-11-28
© Ericsson Radio Systems AB
— All Rights Reserved —
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