Huawei Airbridge BTS3606A Technical Manual page 39

Technical Manual
Airbridge BTS3606A CDMA Base Station
I. Protection against wrong insertion of boards
When a board is inserted into a wrong slot, the special guide pins will prevent the board
from touching the backplane. This avoids the possible damage to the equipment owing
to wrong insertion.
II. Active -standby switchover of BCKM
The active BCKM can back up the files to the standby BCKM periodically.
Once critical faults occur to the active BCKM, the original standby BCKM will function
as the active BCKM to ensure normal operation of the BTS.
III. BCIM backup slots
The BTS3606A has BCIM backup slots. Normally the BCIMs reside in the upper slots.
When the upper slots are faulty, the lower slots are used instead.
IV. BCIM/BCKM power supply backup
The power modules of the BCIM and BCKM are mutually backed up. When the power
module of one board is faulty, the power module of another board is used instead.
V. N+1 backup for baseband fans
The baseband fans work in the N+1 backup mode. One standby fan is equipped. When
one fan is faulty, this standby fan starts working to ensure the performance of the
baseband ventilation system.
VI. Link backup of Abis interface
The BTS3606A supports the Abis interface link backup function to improve the
reliability of links. When the backup link is configured, if the active link is faulty, the
system can automatically carry out the active -standby link switchover.
VII. CE pool design of the CCPM
The CCPM adopts the CE pool design. The CCPMs are connected into a daisy chain,
which increases the utilization rate of the channel resource and enables flexible
configuration of the channel capacity of each sector carrier. This enhances the
reliability of the system.
VIII. Status monitoring and alarm report
The BCKM can monitor the status of other boards or modules, and report alarms to
ensure timely fault location.
IX. Distributed power supply
The system adopts distributed power supply. The DC/DC power supply module works
in the N+1 redundancy mode.
5-3
System Description
Chapter 5 Reliability Design