NEC SL1100 Installation Instructions Manual page 16

12.
Press the Mute Key Four Times to back out of 10-12 programming.
13.
Press the Exit Key.
GIVE THE PHONE SYSTEM 5 MINUTES TO SAVE CHANGES
Even though the phone's display has come back up, the changes are still
being written to the processor! Do NOT reboot the system during this time.
Also, IF this is a pre-existing phone system and it already has custom
programming, we strongly recommend backing up the phone system's
database before continuing.
14.
After 5 Minutes, Power off the Phone System.
15.
Plug in your Ethernet Cable to the Ethernet Port on the CPU Card of the SL1100. (See the diagram of
the SL1100's Ethernet Port below)
16.
Wait 2 Minutes Before Turning the Power Back On.
17.
Turn the NEC SL1100 on and wait for the phones and KSU to power up (approx. 3-5 minutes).
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SL1100 Installation Instructions
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