Hardware Reliability - Huawei Airbridge BTS3606A Technical Manual

Technical Manual
Airbridge BTS3606A CDMA Base Station
V. Redundancy design
For the purpose of reliability, the system is designed with several sets of units
performing the same function. The system will not fail unless the number of units failed
amounts to the specified quantity.
VI. Reliability design for input voltage
The system is protected against reverse connection of power supply.
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The input voltage is tested and alarm signal will be generated when the voltage is
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too low or too high.
The system is protected against sharp voltage drop and lightning strikes.
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The system can protect program and data in the case of power failure.
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VII. Maintainability design
The reasonable internal wiring of the BTS facilitates board replacement. To replace a
faulty board, user only needs to remove the cable of this board. The board can be
removed and inserted directly from the front of the cabinet.
In addition, board indicators are provided to help users identify board status.
VIII. Fault monitoring and handling
The BTS3606A system can self-detect and diagnose the faults of software and
hardware. It can record, output and print various fault information. In addition, it collects
environment condition information and generates alarms if there is any problem.
When faults occur to the hardware, the system locates the fault, isolates the faulty
component, and automatically carries out switchover to the standby components that
operate normally.
The system makes a final confirmation on a hardware fault through repeated detection,
thus avoiding the reconfiguration of the system or the degradation of QoS due to
contingent faults.
When faults occur to the software, automatic error-correction and recovery functions
will be executed, including restarting and reloading.
The network management system records, outputs, and notifies the users of critical
faults. In this way, users can operate and maintain the system with ease through
maintenance console.

5.2 Hardware Reliability

The hardware reliability design involves the following aspects:
5-2
System Description
Chapter 5 Reliability Design