User Manual

CDMA PicoBTSTM Hardware Description Page 22
The mean time between critical failures (MTBCF) is greater
than 2.5 years for a three-sector base station and includes all
critical functions.
4.2.2 Failure types
A critical failure is a failure that is service critical and
requires immediate repair. Specific cases include:
• Capacityreductionbymorethan50%(inanomniorsector
configuration)
• Failure of one sector (in a sector configuration)
A reliability failure includes any event or inoperable state
resulting in a failure by the PicoBTS
TM
base station to perform
a critical function. Critical functions include, but are not
limited to the following list:
• Call processing of an emergency call
• Call processing of a call during normal or peak traffic hours
4.3 Performance requirements
4.3.1 Industry compliance requirements
The PicoBTS meets the minimum performance requirements of
J-STD-019.
4.3.2 Maintainability
Samsung has designated craft and technical support personnel
to perform depot and factory maintenance on the PicoBTS
TM
base station.
Module replacement at the site is limited to replacing a field
replaceable unit (FRU). The PicoBTS
TM
base station FRUs are
the PMU, a PRU, an antenna, or a cable.