Document Title Security Level
2006-10-04 HUAWEI Confidential Page18, Total35
6 Reliability
6.1 System Reliability
The BTS3012 is designed after overall analysis on system reliability. The
BTS3012 uses the following methods to enhance the system reliability:
z Active/standby mode
z Load sharing
z Redundant configuration
z Optimized fault detection of boards and system
z Optimized fault isolation
Redundancy
The BTS3012 uses the redundancy design. The key clock bus, control bus, data
bus, DTMU modules use 1+1 backup mode. The transceivers mutual aid is also
supported.
System Monitoring
The BTS3012 can automatically detect and diagnose faults in the hardware or
software and report them in form of alarms. It can also detect environmental
status and report abnormalities in time.
6.2 Hardware Reliability
The BTS3012 uses the following methods to enhance hardware reliability:
z Prevention against Mistakenly Inserted Boards
z Redundancy Design of Fan Box
z Protection against Excessive Rise in Temperature of the DTRU
z Reliability Design for Power Supply
z Excellent Lightning Protection Design
Prevention against Mistakenly Inserted Boards
When a functional board is inserted into a wrong slot, it cannot get into full contact
with the backplane. This prevents the equipment from being damaged.
Redundancy Design of Fan Box
The fan uses N+1 redundancy backup mode. If a fan is faulty, the other fans run
at full speed. Under normal temperature, this design can meet the heat
dissipation requirement.
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