PUMA T2
Technical Handbook
General information
Page 22 OTE Proprietary information
P/N: 779-0306/01
Revision 03
1.12 MAINTENANCE
Maintenance concerns all the actions aimed to maintain or restore the equipment
operativity.
Maintenance can be preventive (scheduled maintenance) and corrective
(unscheduled maintenance).
In order to schedule maintenance interventions it is necessary to divide
maintenance into levels according to the operations to be carried out.
The maintenance levels define the actions and the personnel allowed to carry out
the maintenance operations.
Three maintenance levels are thus defined:
• I: Equipment Maintenance Level.
• II: Module Maintenance Level.
• III: Component Maintenance Level.
For example in a TETRA system we can define:
• Equipment: any radio terminal (Hand-held, vehicular or fixed).
• Module: a Base Band of TTU400 of the Base Station BS400.
• Component: any part of a module (e.g. an IC).
A description of the maintenance levels is shown in Tab. 1.3.
Tab. 1.3: Maintenance levels
Maintenance level Action Personnel
I Replacement of an equipment Operator
II Replacement of a module of an
equipment
Maintenance technician
III Replacement of a component of a
module or equipment
OTE technician
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