How is the S7700&S9700 grounded

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The chassis of an S7712 or S7706 has a ground screw on the lower right part of the front, and the chassis of an S7703 has a ground screw on the lower left part of the rear.
The chassis of an S9712, S9706, or S9703 has a ground screw on the lower left part of the rear.
Ensure correct grounding to guarantee the normal operation of the S7700&S9700.

Other related questions:
Does the S7700&S9700 support hot backup
The S7700&S9700 supports hot backup. When the master main control board fails, the S7700&S9700 automatically switches services to the slave board without interrupting the services. The software versions of the master board and slave board must be the same. You can also run the slave switchover command to trigger the active/standby switchover manually. [HUAWEI] slave switchover Caution!!! Confirm switch slave to master[Y/N]?y Ensure that data on the master board is backed up to the slave board before you trigger the master/slave switchover. That is, the slave board is in the real-time backup state. If the board is backing up data, you cannot perform switchover. In this case, you can run the display switch state command to view the status of the slave board. display switch state Master MPU: Realtime and routine backup. Slave MPU: Receiving realtime and routine data.

What are the functions of the CF card of the S7700&S9700
The S7700&S9700 series switches support standard CF cards. The default capacity of a CF card is 512 MB, expandable to 1 GB or 2 GB. The CF card is used to store system files, configuration files, paf, License, and log files. The S7700&S9700 series switches can start by using the startup file in the CF card. In this case, the system software package is stored on the CF card. It is required to specify the system software package on the CF card as the boot file. On the S7700&S9700 series switches, logs can be stored on the CF cards. Do not use the uncertified CF cards to prevent unpredictable problems.

What is the temperature of the S7700&S9700 in different situations
The temperature range of the S7700&S9700 is as follows: Operating temperature: 0°C to 45°C Storage temperature: -40°C to +70°C You can run the display temperature command to view the temperature of the S7700&S9700 card. If no alarm is generated, the device is working normally and the temperature is within the allowed range. NOTE: The set transceiver temperature threshold command sets the temperature threshold for adjusting the fan speed. When the temperature of an optical module exceeds the upper threshold, the fan speed is increased. When the temperature of an optical module falls below the lower threshold, the fan speed is reduced. The display transceiver temperature threshold command displays the upper and lower temperature thresholds for adjusting the fan speed.

Are the power modules of the S7700&S9700 hot swappable
Power modules of the S7700&S9700 are hot swappable. Before removing a power module, ensure that the chassis can work normally without the power module. When removing or installing a power module, take electrical protective measures to avoid electric shock.

How does the S7700&S9700 write logs to CF card
The logs are cached instead of being immediately written into the log files on the CF card. The S7700&S9700 supports two methods to write the logs: On the S7700&S9700, the cache can store 33 KB logs. When the cache is full, the logs are written into the log file on the CF card. You can also store logs to the CF card manually. That is, run the save logfile command in the user view. The information in the cache can be immediately written into the log file on the CF card. NOTE: Before providing the logs to R&D, import the logs into log files.

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