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20 MBU 400 Installation Guide
6. To manually register the handset, select Settings->System Settings
->Handset Settings->Register handset and press Yes at the prompt.
The handset begins the registration process immediately.
Note: If multiple handsets are registered with the MBU, you can also
select a specific handset by selecting Handsets in the Handset
Settings menu, choosing the required handset, and pressing the
Register or Deregister softkey.
Registering Additional Handsets with the MBU
You can register additional handsets (up to 8 handsets) with your MBU.
Make sure your handsets are within range of the MBU before registering
them.
To register additional handsets:
1. Press and release the Reset button once (do not hold down) on the rear
of the MBU.
2. Manually De-register the handset being added to initiate the auto-
registration process.
3. Place the handset in the charger.
When the new handsets have successfully registered, the status
indicator in the upper left corner of the screen turns white.
Factory Defaulting the MBU
If required, you can set the MBU back to its factory default settings.
To factory default the MBU:
1. Press and HOLD the Reset button on the rear of the MBU for
approximately 12 seconds, until all the LEDs (Power, I-Net, VOIP,
and Call) on the MBU light up at the same time.
2. Release the Reset button. The LEDs go off as the MBU proceeds to
factory default.
When the factory default is complete, the Power LED lights up steady
and all other LEDs are off.
Note: Factory defaulting the MBU automatically de-registers all
associated handsets. You must manually re-register the
handset(s) with the MBU using the procedure in the section,
“Manually Registering/De-registering the Handset” on
page 19.
Optional MBU and Handset Tasks