Product Specification for RBS 2302
5.8.9 Dependability
Technical Lifetime
The RBS is designed for a technical lifetime of 20 years (24 hours
operation).
Preventive Maintenance
The RBS has the following availability performance.
Action Interval
Mean repair time (MRT) < 60 minutes
Mean time between failures (MTBF) <8.5 years
Mean accumulated down time (MADT) <6 minutes/year (time to reach
the site is not included)
These preventive maintenance conditions must be fulfilled to guarantee
the availability figures above.
Action Interval
Change of battery < 5 years
Change of lightning protection equipment <10 years
Calibration of "optional" synchronisation oscillator < 3 years
5.8.10 Installation
A quick and easy installation procedure is provided. If the installation
preconditions are met, the RBS can be installed in less than 30 minutes.
A minimum of tools and instruments are required when installing an
RBS.
Preconditions
•
It is possible to adjust the RBS in vertical direction ± 10
.
• Wall mounting with no visible cables is supported.
• The initiation of the BSC is prepared.
• The transport network is available
1)
at the site
• Mains power is available at site
• Preinstalled antennas and feeders are available
1)
• Wall fixture is preinstalled
• Favourable geographic location and environment (means higher
than -10
C, no precipitation and easy access to the site)
1)
"available" means: accessible and with specified function.
70 (306)
EN/LZT 123 2697 R5A
1998-08-13
© Ericsson Radio Systems AB
— All Rights Reserved —
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