• If Expansion KSU(s) are installed, turn the power on/off in the order of Expan-
sion 2 KSU, Expansion 1 KSU and then Main KSU.
• DO NOT power off by disconnecting the AC (or DC for battery backup) power.
Always use the Power Switch on the Main/Expansion KSU.
• All calls in progress will be cut off when the system is powered off, and if the
Power Failure is set, the applicable extension will become operational.
• All user's setting (such as Call Forward, Camp-On, etc) will be kept.
Always use the Power Switch on the Main/Expansion KSU.
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