• Unplug the system from its power source when wiring, and plug the system back in only after allwiring is completed.Notice• Mis-wiring may cause the Control Box to operate improperly.• If an extension does not operate properly, disconnect the telephone from the extension line andconnect it again, or turn off the Control Box using the power switch, then turn it on again.Hardware Maintenance PrecautionsBe sure to follow these instructions when performing hardware maintenance of the unit:CAUTION• If the heat sensor inside the Control Box detects abnormally high temperatures, power supply to theunit will be forcefully stopped. In that case, turn off the Control Box using the power switch, then turn iton again.• If the feature is enabled, an error log will indicate when abnormal fan operation is detected in thesystem heat control. In that case, consult the system administrator to replace of the fan.• The operating conditions (e.g., CPU usage percentage, memory usage, and Main Storage MemoryCard product life) are monitored, and monitoring results will be notified by methods such as the errorlog and system alarm. For details, consult your system administrator.Notice• The following contents will be recorded in the log:– Memory usage– SWAP memory free space– Page In/Out speed– Disk memory usage– Main Storage Memory Card product life time– Amount data sent/received per virtual NIC– Number of sent/received packets and packet loss per virtual NIC3.2 Installation of the Control Box3.2.1 UnpackingUnpack the box and check the items below:• Main unit• Manual(s)• Hook clip• 19-inch rack attachment bracket x 2• Screw x 6• AC power cord (BF, C2)3.2 Installation of the Control BoxInstallation Manual 27