ZXR10 8900E series Core Switch Product Description
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ZXR10 8900E active/standby main control modules always synchronize clock information.
When receiving Bits and GPS signals, one main control module sends the signals to the
other main control module. Line card receives the clock signal from active and standby
main control modules at the same time, but one line card only takes the clock of active
main control module as system reference clock. When a fault happens to active main
control module, line card can switch the clock to take the clock of standby main control
module as system reference clock.
3.7
Reliability protection
3.7.1
Equipment-level protection
3.7.1.1
Main control board protection
ZXR10 8900E adopts the carrier-class reliability design. It has two main control boards.
Each main control board has control module and switching module, and two main control
boards can make load balance and redundant backup, and supports the redundancy of
switching module and main control module. When a fault occurs to active module,
services and data can be switched from active main control board to standby main
control board to forward data and operate services without interruption.
3.7.1.2
Power supply module protection
To comply with strict equipment reliability requirements of telecom carriers, ZXR10
8900E adopts hot backup design for power supply, and employs 48V DC and 220V AC.
DC adopts 1+1 mode, and AC adopts 1+1 or 2+1 backup according to different racks to
improve the reliability of power supply system. Furthermore, 8900E power supply
supports several intelligent protection mechanisms, and provides protection, detection
and fault report for power supply according to such parameters as voltage, current and
temperature.
3.7.1.3
System supervision protection
ZXR10 8900E meets the carrier-class reliability requirements and provides a whole set of
system supervision means to drop user maintenance cost and improve equipment
stability and reliability.
In terms of hardware, ZXR10 8900E can supervise such information as environment
temperature, board temperature, fan status, power supply status, power supply power
sampling (including PoE power supply). In terms of software, it can collects such status
information as environment temperature, board temperature, fan status, power supply
status, power supply power sampling (including PoE power supply). When going wrong
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