User Manual

CDMA PicoBTSTM Hardware Description Page 23

If the PicoBTS

base station is installed in accordance with

the clearances prescribed for installation, the PicoBTS

base

station allows easy access to the faulty module for

replacement. The PicoBTS

base station is designed to

minimize the number of steps required to remove and replace a

module.

4.3.3 Mean time to repair (MTTR)

MTTR applies to the length of time required to replace a FRU)

and includes the following operations by field personnel:

• Time required to perform fault detection and isolate the

problem to a single FRU

• Time required to disassemble mounting fixtures (if any)

• Time required to replace the failed FRU

• Time required to reassemble mounting fixtures

• Time required to align and check out of the replacement FRU.

At the site level, the PicoBTS

base station has a MTTR of

thirty (30) minutes or less, and a maximum time to repair

(MTTR

MAX

) of ninety (90) minutes or less at the 95

percentile.

Note: MTTR and MTTR

MAX

do not include the time required to

travel to the PicoBTS

base station site or to climb the tower.