Does the clock work properly after an S series fixed switch is powered off

If some models and versions of S series fixed switches (except S1700 switches) are powered off, the clock can recover. For some other models and versions, the clock cannot recover. For details, see the following:
- For switches running a version earlier than V100R006:
The system clock of a switch is implemented by the software. The system saves the system clock if the switch is powered off and restarted manually. If the switch is powered off due to a power failure, the system time is restored to the factory setting.
- For switches running V100R006 or V200R001:
The system clock of the S3700HI, S5700HI, or S6700 is implemented by the hardware. The system obtains the clock from the hardware if the switch is powered off and restarted manually. System clocks of other models are implemented by the software. The system saves the system clock if a switch is powered off and restarted manually. If the switch is powered off due to a power failure, the system time is restored to the factory setting.
- For switches running V200R002 and V200R003:
The system clock of the S5700HI or S6700 is implemented by the hardware. The system obtains the clock from the hardware if the switch is powered off and restarted manually. System clocks of other models are implemented by the software. The system saves the system clock if the switch is powered off and restarted manually. If the switch is powered off due to a power failure, the system time is restored to the factory setting.
- For switches running V200R005 or a later version:
The system clock of the S5700 or S6700 is implemented by the hardware. The system obtains the clock from the hardware if the switch is powered off and restarted manually. System clocks of other models are implemented by the software. The system saves the system clock if a switch is powered off and restarted manually. If the switch is powered off due to a power failure, the system time is restored to the factory setting.

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